TY - JOUR A1 - Knox-Brown, Patrick A1 - Rindfleisch, Tobias A1 - Günther, Anne A1 - Balow, Kim A1 - Bremer, Anne A1 - Walther, Dirk A1 - Miettinen, Markus S. A1 - Hincha, Dirk K. A1 - Thalhammer, Anja T1 - Similar Yet Different BT - Structural and Functional Diversity among Arabidopsis thaliana LEA_4 Proteins JF - International Journal of Molecular Sciences N2 - The importance of intrinsically disordered late embryogenesis abundant (LEA) proteins in the tolerance to abiotic stresses involving cellular dehydration is undisputed. While structural transitions of LEA proteins in response to changes in water availability are commonly observed and several molecular functions have been suggested, a systematic, comprehensive and comparative study of possible underlying sequence-structure-function relationships is still lacking. We performed molecular dynamics (MD) simulations as well as spectroscopic and light scattering experiments to characterize six members of two distinct, lowly homologous clades of LEA_4 family proteins from Arabidopsis thaliana. We compared structural and functional characteristics to elucidate to what degree structure and function are encoded in LEA protein sequences and complemented these findings with physicochemical properties identified in a systematic bioinformatics study of the entire Arabidopsis thaliana LEA_4 family. Our results demonstrate that although the six experimentally characterized LEA_4 proteins have similar structural and functional characteristics, differences concerning their folding propensity and membrane stabilization capacity during a freeze/thaw cycle are obvious. These differences cannot be easily attributed to sequence conservation, simple physicochemical characteristics or the abundance of sequence motifs. Moreover, the folding propensity does not appear to be correlated with membrane stabilization capacity. Therefore, the refinement of LEA_4 structural and functional properties is likely encoded in specific patterns of their physicochemical characteristics. KW - IDP KW - LEA protein KW - abiotic stress KW - dehydration KW - conformational rearrangement KW - membrane stabilization KW - sequence-structure-function relationship Y1 - 2020 U6 - https://doi.org/10.3390/ijms21082794 SN - 1422-0067 VL - 21 IS - 8 PB - Molecular Diversity Preservation International CY - Basel ER - TY - JOUR A1 - Singh, Jasbir A1 - Dani, Harinder M. A1 - Sharma, Reeta A1 - Steinberg, Pablo T1 - Inhibition of the biosynthesis of SRP polypeptides and secretory proteins by aflatoxin B-1 can disrupt protein targeting JF - Cell biochemistry and function N2 - Cell culture and western blotting studies revealed that aflatoxin B-1 (AFB(1)) inhibits the biosynthesis of two of the constituent polypeptides of signal recognition particle (SRP) (SRP54 and 72). SRP escorts polyribosomes carrying signal peptides from free form in the cytosol to the bound form on endoplasmic reticulum (ER) membrane during protein targeting. These effects of AFB(1) on SRP biosynthesis may inhibit the formation of functional SRP Our experiments have further shown that AFB(1) also inhibits the biosynthesis/translocation of a secretory protein, preprolactin, which fails to appear in the lumen of ER consequent to the treatment with this hepatocarcinogen. The results of the experiments presented in this article therefore enable us to infer for the first time that aflatoxin B-1 may inhibit the functioning of SRP as an escort and deplete the ER of polyribosomes for secretory protein synthesis. As these secretory proteins are important components of the plasma membrane, gap junctions and intercellular matrix, their absence from these locations could disturb cell to cell communication leading to tumorigenesis. KW - aflatoxin B-1 KW - SRP KW - protein targeting KW - protein translocation KW - western blotting Y1 - 2005 U6 - https://doi.org/10.1027/cbf.1285 SN - 0263-6484 VL - 24 SP - 507 EP - 510 PB - Wiley CY - Chichester ER - TY - JOUR A1 - Oberauer, Klaus T1 - Reasoning with conditionals: A test of formal models of four theories JF - Cognitive psychology N2 - The four dominant theories of reasoning from conditionals are translated into formal models: The theory of mental models (Johnson-Laird, P. N., & Byrne, R. M. J. (2002). Conditionals: a theory of meaning, pragmatics, and inference. Psychological Review, 109, 646-678), the suppositional theory (Evans, J. S. B. T., & Over, D. E. (2004). If. Oxford: Oxford University Press), a dual-process variant of the model theory (Verschueren, N., Schaeken, W., & d'Ydewalle, G. (2005). A dual-process specification of causal conditional reasoning. Thinking & Reasoning, 11, 278-293), and the probabilistic theory (Oaksford, M., Chater, N., & Larkin, J. (2000). Probabilities and polarity biases in conditional inference. Journal of Experimental Psychology: Learning, Memory, and Cognition, 26, 883-899). The first three theories are formalized as multinomial models. The models are applied to the frequencies of patterns of acceptance or rejection across the four basic inferences modus ponens, acceptance of the consequent, denial of the antecedent, and modus tollens. Model fits are assessed for two large data sets, one representing reasoning with abstract, basic conditionals, the other reflecting reasoning with pseudo-realistic causal and non-causal conditionals. The best account of the data was provided by a modified version of the mental-model theory, augmented by directionality, and by the dual-process model. KW - conditionals KW - reasoning KW - multinomial models Y1 - 2006 U6 - https://doi.org/10.1016/j.cogpsych.2006.04.001 SN - 0010-0285 VL - 53 IS - 3 SP - 238 EP - 283 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Mohsen, Ayman A1 - Kind, Rainer A1 - Sobolev, Stephan Vladimir A1 - Weber, Michael T1 - Thickness of the lithosphere east of the Dead Sea Transform JF - Geophysical journal international N2 - We use the S receiver function method to study the lithosphere at the Dead Sea Transform (DST). A temporary network of 22 seismic broad-band stations was operated on both sides of the DST from 2000 to 2001 as part of the DESERT project. We also used data from six additional permanent broad-band seismic stations at the DST and in the surrounding area, that is, in Turkey, Saudi Arabia, Egypt and Cyprus. Clear S-to-P converted phases from the crust-mantle boundary (Moho) and a deeper discontinuity, which we interpret as lithosphere-asthenosphere boundary (LAB) have been observed. The Moho depth (30-38 km) obtained from S receiver functions agrees well with the results from P receiver functions and other geophysical data. We observe thinning of the lithosphere on the eastern side of the DST from 80 km in the north of the Dead Sea to about 65 km at the Gulf of Aqaba. On the western side of the DST, the few data indicate a thin LAB of about 65 km. For comparison, we found a 90-km-thick lithosphere in eastern Turkey and a 160-km-thick lithosphere under the Arabian shield, respectively. These observations support previous suggestions, based on xenolith data, heat flow observations, regional uplift history and geodynamic modelling, that the lithosphere around DST has been significantly thinned in the Late Cenozoic, likely following rifting and spreading of the Red Sea. KW - Dead Sea Transform KW - S receiver functions KW - thickness of the lithosphere Y1 - 2006 U6 - https://doi.org/10.1111/j.1365-246X.2006.03185.x SN - 0956-540X SN - 1365-246X VL - 167 IS - 2 SP - 845 EP - 852 PB - Blackwell CY - Oxford ER - TY - JOUR A1 - Garcia, A. L. A1 - Steiniger, J. A1 - Reich, S. C. A1 - Weickert, M. O. A1 - Harsch, I. A1 - Machowetz, A. A1 - Mohlig, M. A1 - Spranger, Joachim A1 - Rudovich, N. N. A1 - Meuser, F. A1 - Doerfer, J. A1 - Katz, N. A1 - Speth, M. A1 - Zunft, Hans-Joachim Franz A1 - Pfeiffer, Andreas F. H. A1 - Koebnick, Corinna T1 - Arabinoxylan fibre consumption improved glucose metabolism, but did not affect serum adipokines in subjects with impaired glucose tolerance JF - Hormone and metabolic research N2 - The consumption of arabinoxylan, a soluble fibre fraction, has been shown to improve glycemic control in type 2 diabetic subjects. Soluble dietary fibre may modulate gastrointestinal or adipose tissue hormones regulating food intake. The present study investigated the effects of arabinoxylan consumption on serum glucose, insulin, lipids, leptin, adiponectin and resistin in subjects with impaired glucose tolerance. In a randomized, single-blind, controlled, crossover intervention trial, 11 adults consumed white bread rolls as either placebo or supplemented with 15g arabinoxylan for 6 weeks with a 6-week washout period. Fasting serum glucose, insulin, triglycerides, unesterified fatty acids, apolipoprotein A1 and B, adiponectin, resistin and leptin were assessed before and after intervention. Fasting serum glucose, serum triglycerides and apolipoprotein A-1 were significantly lower during arabinoxylan consumption compared to placebo (p = 0.029, p = 0.047; p = 0.029, respectively). No effects of arabinoxylan were observed for insulin, adiponectin, leptin and resistin as well as for apolipoprotein B, and unesterified fatty acids. In conclusion, the consumption of AX in subjects with impaired glucose tolerance improved fasting serum glucose, and triglycerides. However, this beneficial effect was not accompanied by changes in fasting adipokine concentrations. KW - dietary fibre KW - arabinoxylan KW - adiponectin KW - resistin KW - leptin Y1 - 2006 U6 - https://doi.org/10.1055/s-2006-955089 SN - 0018-5043 VL - 38 IS - 2 SP - 761 EP - 766 PB - Thieme CY - Stuttgart ER - TY - JOUR A1 - Maares, Maria A1 - Keil, Claudia A1 - Koza, Jenny A1 - Straubing, Sophia A1 - Schwerdtle, Tanja A1 - Haase, Hajo T1 - In Vitro Studies on Zinc Binding and Buffering by Intestinal Mucins JF - International Journal of Molecular Sciences N2 - The investigation of luminal factors influencing zinc availability and accessibility in the intestine is of great interest when analyzing parameters regulating intestinal zinc resorption. Of note, intestinal mucins were suggested to play a beneficial role in the luminal availability of zinc. Their exact zinc binding properties, however, remain unknown and the impact of these glycoproteins on human intestinal zinc resorption has not been investigated in detail. Thus, the aim of this study is to elucidate the impact of intestinal mucins on luminal uptake of zinc into enterocytes and its transfer into the blood. In the present study, in vitro zinc binding properties of mucins were analyzed using commercially available porcine mucins and secreted mucins of the goblet cell line HT-29-MTX. The molecular zinc binding capacity and average zinc binding affinity of these glycoproteins demonstrates that mucins contain multiple zinc-binding sites with biologically relevant affinity within one mucin molecule. Zinc uptake into the enterocyte cell line Caco-2 was impaired by zinc-depleted mucins. Yet this does not represent their form in the intestinal lumen in vivo under zinc adequate conditions. In fact, zinc-uptake studies into enterocytes in the presence of mucins with differing degree of zinc saturation revealed zinc buffering by these glycoproteins, indicating that mucin-bound zinc is still available for the cells. Finally, the impact of mucins on zinc resorption using three-dimensional cultures was studied comparing the zinc transfer of a Caco-2/HT-29-MTX co-culture and conventional Caco-2 monoculture. Here, the mucin secreting co-cultures yielded higher fractional zinc resorption and elevated zinc transport rates, suggesting that intestinal mucins facilitate the zinc uptake into enterocytes and act as a zinc delivery system for the intestinal epithelium. KW - intestinal zinc resorption KW - zinc binding KW - mucus layer KW - intestinal mucins KW - in vitro intestinal model KW - goblet cells KW - Caco-2/HT-29-MTX-model Y1 - 2018 U6 - https://doi.org/10.3390/ijms19092662 SN - 1422-0067 VL - 19 IS - 9 ER - TY - JOUR A1 - Damaschun, Ferdinand T1 - Christian Gottfried Ehrenberg und die Entwicklung der Mikroskop-Technik im 19. Jahrhundert BT - Lebensbilder eines Naturforschers JF - HiN : Alexander von Humboldt im Netz = Christian Gottfried Ehrenberg N2 - Ab Mitte der 1820er Jahre erfuhr die Mikroskop- Technik eine stürmische Entwicklung. Dadurch, dass es gelang, nach und nach die optischen Fehler zu korrigieren, verbesserte sich die Auflösung bis zum Ende des Jahrhunderts um den Faktor 10 von 3 μm auf 0,3 μm. Um 1820 begann Christian Gottfried Ehrenberg mit mikroskopischen Untersuchungen. Er nutzte zunächst ein einfaches Nürnberger Mikroskop. 1832 erwarb er ein Mikroskop aus der Berliner Werkstatt von Pistor & Schiek, das er dann zeitlebens nutzte. Ein Vergleich der Leistungsfähigkeit seines Instruments mit der für seine Untersuchungen notwendigen Auflösung zeigt, dass es für seine Untersuchungen vollkommen genügte. Für seine Untersuchungsobjekte entwickelte er Präparationstechniken und Aufbewahrungsmethoden für die Dauerpräparate. Da er auch die mikroskopischen Abbildungen bis hin zu den Vorlagen für die Kupfertafeln selbst anfertigte, behielt er den gesamten Prozess von der Präparation bis zum Druck der Ergebnisse stets in der Hand. N2 - From the mid-1820s onwards, microscope technology underwent a rapid development. Thanks to new possibilities for correcting optical errors, microscope resolution improved by a factor of 10 from 3 μm to 0.3 μm by the end of the century. Ehrenberg began his investigations in 1820 with a simple “Nürnberger Mikroskop”. In 1832, he acquired a microscope from the Berlin workshop of Pistor & Schiek, which he then used throughout his life. By comparing the performance of his instrument with the resolution required for his objects, this article demonstrates that the Pistor & Schiek was perfectly adequate for his investigations. Furthermore, it traces Ehrenberg’s process of producing microscopic images, which he controlled from start to finish: from the preparation and storage of specimens according to special methods he developed himself to the execution of the illustrations that would be used as templates for the copper plates. N2 - À partir du milieu des années 1820, la technologie des microscopes a connu un développement rapide. Grâce aux nouvelles possibilités de correction des erreurs optiques, il a été possible de corriger et d’améliorer la résolution des microscopes par un facteur de 10, passant de 3 μm à 0,3 μm à la fin du siècle. Ehrenberg a commencé ses recherches en 1820 avec un simple « Nürnberger Mikroskop ». En 1832, il a acquis un microscope de l’atelier berlinois de Pistor & Schiek, qu’il a ensuite utilisé toute sa vie. En comparant les performances de son instrument avec la résolution requise pour ses objets, cet article montre que le Pistor & Schiek était parfaitement adapté à ses investigations. En outre, il retrace le processus de production d’images microscopiques d’Ehrenberg, qu’il a contrôlé de bout en bout: de la préparation et du stockage des spécimens selon des méthodes spéciales qu’il a lui-même développées jusqu’à l’exécution des illustrations qui allaient servir de modèles pour les plaques de cuivre. KW - Ehrenberg KW - Mikroskop KW - Glas KW - Infusorien KW - Infusionsthierchen KW - Mikrogeologie KW - Chevalier KW - Pistor & Schiek Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-515218 SN - 1617-5239 SN - 2568-3543 VL - XXII IS - 42 SP - 119 EP - 134 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Böhme, Katrin T1 - Das große Ganze. Christian Gottfried Ehrenberg und die Gesellschaft Naturforschender Freunde zu Berlin BT - Lebensbilder eines Naturforschers JF - HiN : Alexander von Humboldt im Netz = Christian Gottfried Ehrenberg N2 - Als langjähriges und aktives Mitglied der Gesellschaft Naturforschender Freunde zu Berlin bestimmte Ehrenberg ihre Aktivitäten und ihr Ansehen maßgeblich mit. Seine Beiträge zu den Sitzungen und Schriften und seine Rolle als Bewohner des gesellschaftseigenen Hauses förderten in der GNF sowohl Fortschritt als auch Beständigkeit. Das Ziel der Naturgeschichte des 18. Jahrhunderts, also die Entdeckung, Beschreibung und Bewahrung möglichst aller Organismen- und Gesteinsarten, wurde in der GNF bis in die zweite Hälfte des 19. Jahrhunderts tradiert. Ehrenbergs wissenschaftliche Leistungen, insbesondere seine zahlreichen Entdeckungen mit Hilfe des Mikroskops, stehen ganz in dieser Tradition. N2 - As a long-time and active member of the Gesellschaft naturforschender Freunde zu Berlin (Berlin Society of Friends of Natural Research), Ehrenberg played a major role in determining the society’s activities and shaping its reputation. His contributions to the meetings, his writings, and his role as a resident of the house belonging to the society promoted both progress and permanence of the association. The goal of natural history in the 18th century, that is, the discovery, description, and preservation of as many species of organisms and rocks as possible, was carried forth by the Gesellschaft naturforschender Freunde into the second half of the 19th century. Ehrenberg’s scientific achievements, particularly his numerous discoveries with the aid of the microscope, belong entirely to this tradition. N2 - En tant que membre actif et de longue date de la Gesellschaft naturforschender Freunde zu Berlin (Société des amis naturalistes de Berlin), Ehrenberg a joué un rôle majeur en déterminant les activités et la réputation de cette société. Ses contributions aux réunions et aux écrits et son statut d’habitant de la maison appartenant à la société ont favorisé à la fois le progrès et la pérennité de l’association. L’objectif de l’histoire naturelle au XVIIIe siècle, c’est-à-dire la découverte, la description et la préservation d’autant d’espèces d’organismes et de roches que possible, a été perpétué par la Gesellschaft naturforschender Freunde jusqu’à la seconde moitié du XIXe siècle. Les travaux scientifiques d’Ehrenberg, notamment ses nombreuses découvertes à l’aide du microscope, s’inscrivent entièrement dans cette tradition. KW - Gesellschaft Naturforschender Freunde zu Berlin KW - Ehrenberg KW - GNF KW - Infusorienwerke Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-515226 SN - 1617-5239 SN - 2568-3543 VL - XXII IS - 42 SP - 155 EP - 169 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Nitze, Ingmar A1 - Grosse, Guido A1 - Jones, Benjamin M. A1 - Romanovsky, Vladimir E. A1 - Boike, Julia T1 - Remote sensing quantifies widespread abundance of permafrost region disturbances across the Arctic and Subarctic JF - Nature Communications N2 - Local observations indicate that climate change and shifting disturbance regimes are causing permafrost degradation. However, the occurrence and distribution of permafrost region disturbances (PRDs) remain poorly resolved across the Arctic and Subarctic. Here we quantify the abundance and distribution of three primary PRDs using time-series analysis of 30-m resolution Landsat imagery from 1999 to 2014. Our dataset spans four continental-scale transects in North America and Eurasia, covering similar to 10% of the permafrost region. Lake area loss (-1.45%) dominated the study domain with enhanced losses occurring at the boundary between discontinuous and continuous permafrost regions. Fires were the most extensive PRD across boreal regions (6.59%), but in tundra regions (0.63%) limited to Alaska. Retrogressive thaw slumps were abundant but highly localized (< 10(-5)%). Our analysis synergizes the global-scale importance of PRDs. The findings highlight the need to include PRDs in next-generation land surface models to project the permafrost carbon feedback. Y1 - 2018 U6 - https://doi.org/10.1038/s41467-018-07663-3 SN - 2041-1723 VL - 9 PB - Nature Publ. Group CY - London ER - TY - JOUR A1 - Kath, Nadja J. A1 - Boit, Alice A1 - Guill, Christian A1 - Gaedke, Ursula T1 - Accounting for activity respiration results in realistic trophic transfer efficiencies in allometric trophic network (ATN) models JF - Theoretical ecology N2 - Allometric trophic network (ATN) models offer high flexibility and scalability while minimizing the number of parameters and have been successfully applied to investigate complex food web dynamics and their influence on food web diversity and stability. However, the realism of ATN model energetics has never been assessed in detail, despite their critical influence on dynamic biomass and production patterns. Here, we compare the energetics of the currently established original ATN model, considering only biomass-dependent basal respiration, to an extended ATN model version, considering both basal and assimilation-dependent activity respiration. The latter is crucial in particular for unicellular and invertebrate organisms which dominate the metabolism of pelagic and soil food webs. Based on metabolic scaling laws, we show that the extended ATN version reflects the energy transfer through a chain of four trophic levels of unicellular and invertebrate organisms more realistically than the original ATN version. Depending on the strength of top-down control, the original ATN model yields trophic transfer efficiencies up to 71% at either the third or the fourth trophic level, which considerably exceeds any realistic values. In contrast, the extended ATN version yields realistic trophic transfer efficiencies 30% at all trophic levels, in accordance with both physiological considerations and empirical evidence from pelagic systems. Our results imply that accounting for activity respiration is essential for consistently implementing the metabolic theory of ecology in ATN models and for improving their quantitative predictions, which makes them more powerful tools for investigating the dynamics of complex natural communities. KW - Food web KW - Trophic transfer efficiency KW - Allometric trophic network model KW - Allometry KW - Energy transfer KW - Activity respiration Y1 - 2018 U6 - https://doi.org/10.1007/s12080-018-0378-z SN - 1874-1738 SN - 1874-1746 VL - 11 IS - 4 SP - 453 EP - 463 PB - Springer CY - Heidelberg ER - TY - JOUR A1 - Fritz, Michael Andre A1 - Rosa, Stefanie A1 - Sicard, Adrien T1 - Mechanisms Underlying the Environmentally Induced Plasticity of Leaf Morphology JF - Frontiers in genetics N2 - The primary function of leaves is to provide an interface between plants and their environment for gas exchange, light exposure and thermoregulation. Leaves have, therefore a central contribution to plant fitness by allowing an efficient absorption of sunlight energy through photosynthesis to ensure an optimal growth. Their final geometry will result from a balance between the need to maximize energy uptake while minimizing the damage caused by environmental stresses. This intimate relationship between leaf and its surroundings has led to an enormous diversification in leaf forms. Leaf shape varies between species, populations, individuals or even within identical genotypes when those are subjected to different environmental conditions. For instance, the extent of leaf margin dissection has, for long, been found to inversely correlate with the mean annual temperature, such that Paleobotanists have used models based on leaf shape to predict the paleoclimate from fossil flora. Leaf growth is not only dependent on temperature but is also regulated by many other environmental factors such as light quality and intensity or ambient humidity. This raises the question of how the different signals can be integrated at the molecular level and converted into clear developmental decisions. Several recent studies have started to shed the light on the molecular mechanisms that connect the environmental sensing with organ-growth and patterning. In this review, we discuss the current knowledge on the influence of different environmental signals on leaf size and shape, their integration as well as their importance for plant adaptation. KW - plants KW - leaf morphology KW - environment KW - developmental plasticity KW - gene regulatory networks KW - sensory system KW - gene responsiveness Y1 - 2018 U6 - https://doi.org/10.3389/fgene.2018.00478 SN - 1664-8021 VL - 9 PB - Frontiers Research Foundation CY - Lausanne ER - TY - JOUR A1 - Walther, Sophia A1 - Guanter, Luis A1 - Heim, Birgit A1 - Jung, Martin A1 - Duveiller, Gregory A1 - Wolanin, Aleksandra A1 - Sachs, Torsten T1 - Assessing the dynamics of vegetation productivity in circumpolar regions with different satellite indicators of greenness and photosynthesis JF - Biogeosciences N2 - High-latitude treeless ecosystems represent spatially highly heterogeneous landscapes with small net carbon fluxes and a short growing season. Reliable observations and process understanding are critical for projections of the carbon balance of the climate-sensitive tundra. Space-borne remote sensing is the only tool to obtain spatially continuous and temporally resolved information on vegetation greenness and activity in remote circumpolar areas. However, confounding effects from persistent clouds, low sun elevation angles, numerous lakes, widespread surface inundation, and the sparseness of the vegetation render it highly challenging. Here, we conduct an extensive analysis of the timing of peak vegetation productivity as shown by satellite observations of complementary indicators of plant greenness and photosynthesis. We choose to focus on productivity during the peak of the growing season, as it importantly affects the total annual carbon uptake. The suite of indicators are as follows: (1) MODIS-based vegetation indices (VIs) as proxies for the fraction of incident photosynthetically active radiation (PAR) that is absorbed (fPAR), (2) VIs combined with estimates of PAR as a proxy of the total absorbed radiation (APAR), (3) sun-induced chlorophyll fluorescence (SIF) serving as a proxy for photosynthesis, (4) vegetation optical depth (VOD), indicative of total water content and (5) empirically upscaled modelled gross primary productivity (GPP). Averaged over the pan-Arctic we find a clear order of the annual peak as APAR <= GPP < SIF < VIs/VOD. SIF as an indicator of photosynthesis is maximised around the time of highest annual temperatures. The modelled GPP peaks at a similar time to APAR. The time lag of the annual peak between APAR and instantaneous SIF fluxes indicates that the SIF data do contain information on light-use efficiency of tundra vegetation, but further detailed studies are necessary to verify this. Delayed peak greenness compared to peak photosynthesis is consistently found across years and land-cover classes. A particularly late peak of the normalised difference vegetation index (NDVI) in regions with very small seasonality in greenness and a high amount of lakes probably originates from artefacts. Given the very short growing season in circumpolar areas, the average time difference in maximum annual photosynthetic activity and greenness or growth of 3 to 25 days (depending on the data sets chosen) is important and needs to be considered when using satellite observations as drivers in vegetation models. Y1 - 2018 U6 - https://doi.org/10.5194/bg-15-6221-2018 SN - 1726-4170 SN - 1726-4189 VL - 15 IS - 20 SP - 6221 EP - 6256 PB - Copernicus CY - Göttingen ER - TY - JOUR A1 - Kaboth-Bahr, Stefanie A1 - Bahr, André A1 - Zeeden, Christian A1 - Yamoah, Kweku A. A1 - Lone, Mahjoor Ahmad A1 - Chuang, Chih-Kai A1 - Löwemark, Ludvig A1 - Wei, Kuo-Yen T1 - A tale of shifting relations BT - East Asian summer and winter monsoon variability during the Holocene JF - Scientific Reports N2 - Understanding the dynamics between the East Asian summer (EASM) and winter monsoon (EAWM) is needed to predict their variability under future global warming scenarios. Here, we investigate the relationship between EASM and EAWM as well as the mechanisms driving their variability during the last 10,000 years by stacking marine and terrestrial (non-speleothem) proxy records from the East Asian realm. This provides a regional and proxy independent signal for both monsoonal systems. The respective signal was subsequently analysed using a linear regression model. We find that the phase relationship between EASM and EAWM is not time-constant and significantly depends on orbital configuration changes. In addition, changes in the Atlantic Meridional Overturning circulation, Arctic sea-ice coverage, El Niño-Southern Oscillation and Sun Spot numbers contributed to millennial scale changes in the EASM and EAWM during the Holocene. We also argue that the bulk signal of monsoonal activity captured by the stacked non-speleothem proxy records supports the previously argued bias of speleothem climatic archives to moisture source changes and/or seasonality. KW - Environmental sciences KW - Ocean sciences KW - Solid Earth sciences Y1 - 2020 U6 - https://doi.org/10.1038/s41598-021-85444-7 SN - 2045-2322 VL - 11 PB - Macmillan Publishers Limited, part of Springer Nature CY - London ER - TY - JOUR A1 - Schaal, Frederik A1 - Rutloh, Michael A1 - Weidenfeld, Susanne A1 - Stumpe, Joachim A1 - Michler, Peter A1 - Pruss, Christof A1 - Osten, Wolfgang T1 - Optically addressed modulator for tunable spatial polarization control JF - Optics express : the international electronic journal of optics N2 - We present an optically addressed non-pixelated spatial light modulator. The system is based on reversible photoalignment of a LC cell using a red light sensitive novel azobenzene photoalignment layer. It is an electrode-free device that manipulates the liquid crystal orientation and consequently the polarization via light without artifacts caused by electrodes. The capability to miniaturize the spatial light modulator allows the integration into a microscope objective. This includes a miniaturized 200 channel optical addressing system based on a VCSEL array and hybrid refractive-diffractive beam shapers. As an application example, the utilization as a microscope objective integrated analog phase contrast modulator is shown. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement Y1 - 2018 U6 - https://doi.org/10.1364/OE.26.028119 SN - 1094-4087 VL - 26 IS - 21 SP - 28119 EP - 28130 PB - Optical Society of America CY - Washington ER - TY - JOUR A1 - Peng, Junjie A1 - Liu, Danxu A1 - Wang, Yingtao A1 - Zeng, Ying A1 - Cheng, Feng A1 - Zhang, Wenqiang T1 - Weight-based strategy for an I/O-intensive application at a cloud data center JF - Concurrency and computation : practice & experience N2 - Applications with different characteristics in the cloud may have different resources preferences. However, traditional resource allocation and scheduling strategies rarely take into account the characteristics of applications. Considering that an I/O-intensive application is a typical type of application and that frequent I/O accesses, especially small files randomly accessing the disk, may lead to an inefficient use of resources and reduce the quality of service (QoS) of applications, a weight allocation strategy is proposed based on the available resources that a physical server can provide as well as the characteristics of the applications. Using the weight obtained, a resource allocation and scheduling strategy is presented based on the specific application characteristics in the data center. Extensive experiments show that the strategy is correct and can guarantee a high concurrency of I/O per second (IOPS) in a cloud data center with high QoS. Additionally, the strategy can efficiently improve the utilization of the disk and resources of the data center without affecting the service quality of applications. KW - IOPS KW - process scheduling KW - random I KW - O KW - small files KW - weight Y1 - 2018 U6 - https://doi.org/10.1002/cpe.4648 SN - 1532-0626 SN - 1532-0634 VL - 30 IS - 19 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Seiß, Martin A1 - Albers, Nicole A1 - Sremčević, Miodrag A1 - Schmidt, Jürgen A1 - Salo, Heikki A1 - Seiler, Michael A1 - Hoffmann, Holger A1 - Spahn, Frank T1 - Hydrodynamic Simulations of Moonlet-induced Propellers in Saturn's Rings BT - Application to Bleriot JF - The astronomical journal N2 - One of the biggest successes of the Cassini mission is the detection of small moons (moonlets) embedded in Saturns rings that cause S-shaped density structures in their close vicinity, called propellers. Here, we present isothermal hydrodynamic simulations of moonlet-induced propellers in Saturn's A ring that denote a further development of the original model. We find excellent agreement between these new hydrodynamic and corresponding N-body simulations. Furthermore, the hydrodynamic simulations confirm the predicted scaling laws and the analytical solution for the density in the propeller gaps. Finally, this mean field approach allows us to simulate the pattern of the giant propeller Blériot, which is too large to be modeled by direct N-body simulations. Our results are compared to two stellar occultation observations by the Cassini Ultraviolet Imaging Spectrometer (UVIS), which intersect the propeller Blériot. Best fits to the UVIS optical depth profiles are achieved for a Hill radius of 590 m, which implies a moonlet diameter of about 860 m. Furthermore, the model favors a kinematic shear viscosity of the surrounding ring material of ν0 = 340 cm2 s−1, a dispersion velocity in the range of 0.3 cm s−1 < c0 < 1.5 cm s−1, and a fairly high bulk viscosity 7 < ξ0/ν0 < 17. These large transport values might be overestimated by our isothermal ring model and should be reviewed by an extended model including thermal fluctuations. KW - diffusion KW - hydrodynamics KW - planets and satellites: rings Y1 - 2018 U6 - https://doi.org/10.3847/1538-3881/aaed44 SN - 0004-6256 SN - 1538-3881 VL - 157 IS - 1 PB - IOP Publishing Ltd. CY - Bristol ER - TY - JOUR A1 - Traxler, Juliane A1 - Hanssen, Marjolein M. A1 - Lautenbacher, Stefan A1 - Ottawa, Fabian A1 - Peters, Madelon L. T1 - General versus pain-specific cognitions BT - Pain catastrophizing but not optimism influences conditioned pain modulation JF - European journal of pain N2 - Background Previous studies found evidence that dispositional optimism is related to lower pain sensitivity. Recent findings suggest that temporarily increasing optimism by means of imagining a positive future may also have pain-alleviating effects. Objectives The present experiment was designed to investigate conditioned pain modulation (CPM) as a potential underlying mechanism of this pain-alleviating effect of induced optimism. Methods For this purpose, 45 healthy participants were randomized into an optimistic or neutral imagery condition. Additionally, participants completed questionnaires on dispositional optimism, pain catastrophizing and pain expectations. CPM was assessed by delivering a series of five heat pain stimuli on the nondominant hand before and during immersion of the dominant hand in water of 5 degrees C for 70 s. Results A clear CPM effect was found, that is heat pain reports were lower during simultaneous cold water stimulation. Although the optimism manipulation successfully increased optimism, it did not affect pain ratings or CPM. Post hoc analyses indicated that dispositional optimism was not associated with the magnitude of CPM, but pain catastrophizing and pain expectations did significantly correlate with the CPM effect. Conclusion Pain-specific but not general cognitions appear to influence endogenous pain modulation. Significance Conditioned pain modulation is not the underlying mechanism of the pain-alleviating effects of induced optimism. However, pain-specific cognitions including pain catastrophizing and pain expectations affect endogenous pain modulation which should be taken into account in treatment and CPM research. Y1 - 2018 U6 - https://doi.org/10.1002/ejp.1294 SN - 1090-3801 SN - 1532-2149 VL - 23 IS - 1 SP - 150 EP - 159 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Salzwedel, Annett A1 - Heidler, Maria-Dorothea A1 - Meng, Karin A1 - Schikora, Martin A1 - Wegscheider, Karl A1 - Reibis, Rona Katharina A1 - Völler, Heinz T1 - Impact of cognitive performance on disease-related knowledge six months after multi-component rehabilitation in patients after an acute cardiac event JF - European journal of preventive cardiology : the official ESC journal for primary & secondary cardiovascular prevention, rehabilitation and sports cardiology N2 - Background Although associations between cardiovascular diseases and cognitive impairment are well known, the impact of cognitive performance on the success of patient education as a core component of cardiac rehabilitation remains insufficiently investigated so far. Design Prospective observational study in two inpatient cardiac rehabilitation centres between September 2014 and August 2015 with a follow-up six months after cardiac rehabilitation. Method At admission to and discharge from cardiac rehabilitation, the cognitive performance of 401 patients (54.5 ± 6.3 years, 80% men) following an acute coronary syndrome and/or coronary artery bypass graft was tested using the Montreal Cognitive Assessment. Patients’ disease-related knowledge was determined using a quiz (22 items for medical knowledge and 12 items for healthy lifestyle and behaviour) at both times and at follow-up. The change in knowledge after cardiac rehabilitation was analysed in multivariable regression models. Potentially influencing parameters (e.g. level of education, medication, cardiovascular risk factors, coronary artery bypass graft, comorbidities, exercise capacity) were considered. Results During cardiac rehabilitation, disease-related knowledge was significantly enhanced in both scales. At follow-up, the average level of medical knowledge was significantly reduced, while lifestyle knowledge remained at a stable level. The maintenance of knowledge after cardiac rehabilitation was predominantly predicted by prior knowledge, cognitive performance at discharge from cardiac rehabilitation and, in the case of medical knowledge, by coronary artery bypass graft. Conclusion Patient education in cardiac rehabilitation led to enhanced disease-related knowledge, but the maintenance of this essentially depended on patients’ cognitive performance, especially after coronary artery bypass graft. Therefore, patient education concepts in cardiac rehabilitation should be reconsidered and adjusted as needed. KW - Mild cognitive impairment KW - cardiac rehabilitation KW - patient education KW - coronary artery disease KW - secondary prevention Y1 - 2020 U6 - https://doi.org/10.1177/2047487318791609 SN - 2047-4873 SN - 2047-4881 VL - 26 IS - 1 SP - 46 EP - 55 PB - Sage Publ. CY - London ER - TY - JOUR A1 - Maes, Sybryn L. A1 - Perring, Michael P. A1 - Vanhellemont, Margot A1 - Depauw, Leen A1 - Van den Bulcke, Jan A1 - Brumelis, Guntis A1 - Brunet, Jorg A1 - Decocq, Guillaume A1 - den Ouden, Jan A1 - Härdtle, Werner A1 - Hedl, Radim A1 - Heinken, Thilo A1 - Heinrichs, Steffi A1 - Jaroszewicz, Bogdan A1 - Kopecký, Martin A1 - Malis, Frantisek A1 - Wulf, Monika A1 - Verheyen, Kris T1 - Environmental drivers interactively affect individual tree growth across temperate European forests JF - Global change biology N2 - Forecasting the growth of tree species to future environmental changes requires abetter understanding of its determinants. Tree growth is known to respond to global‐change drivers such as climate change or atmospheric deposition, as well as to localland‐use drivers such as forest management. Yet, large geographical scale studiesexamining interactive growth responses to multiple global‐change drivers are relativelyscarce and rarely consider management effects. Here, we assessed the interactiveeffects of three global‐change drivers (temperature, precipitation and nitrogen deposi-tion) on individual tree growth of three study species (Quercus robur/petraea, Fagus syl-vatica and Fraxinus excelsior). We sampled trees along spatial environmental gradientsacross Europe and accounted for the effects of management for Quercus. We collectedincrement cores from 267 trees distributed over 151 plots in 19 forest regions andcharacterized their neighbouring environment to take into account potentially confounding factors such as tree size, competition, soil conditions and elevation. Wedemonstrate that growth responds interactively to global‐change drivers, with species ‐specific sensitivities to the combined factors. Simultaneously high levels of precipita-tion and deposition benefited Fraxinus, but negatively affected Quercus’ growth, high-lighting species‐specific interactive tree growth responses to combined drivers. ForFagus, a stronger growth response to higher temperatures was found when precipita-tion was also higher, illustrating the potential negative effects of drought stress underwarming for this species. Furthermore, we show that past forest management canmodulate the effects of changing temperatures on Quercus’ growth; individuals in plotswith a coppicing history showed stronger growth responses to higher temperatures.Overall, our findings highlight how tree growth can be interactively determined by glo-bal‐change drivers, and how these growth responses might be modulated by past for-est management. By showing future growth changes for scenarios of environmentalchange, we stress the importance of considering multiple drivers, including past man-agement and their interactions, when predicting tree growth. KW - basal area increment KW - climate change KW - Fagus KW - Fraxinus KW - historical ecology KW - nitrogen deposition KW - Quercus KW - tree-ring analysis Y1 - 2018 U6 - https://doi.org/10.1111/gcb.14493 SN - 1354-1013 SN - 1365-2486 VL - 25 IS - 1 SP - 201 EP - 217 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Meiser, Susanne A1 - Esser, Günter T1 - Interpersonal Stress Generation-A Girl Problem? BT - The Role of Depressive Symptoms, Dysfunctional Attitudes, and Gender in Early Adolescent Stress Generation JF - Journal of early adolescence N2 - To provide further insight into stress generation patterns in boys and girls around puberty, this study investigated longitudinal reciprocal relations between depressive symptoms, dysfunctional attitudes, and stress generation, the process by which individuals contribute to the occurrence of stress in interpersonal contexts (e.g., problematic social interactions) or in noninterpersonal contexts (e.g., achievement problems). A community sample of N = 924 German children and early adolescents (51.8% male) completed depressive symptoms and dysfunctional attitudes measures at T1 and again 20 months later (T2). Stressful life events were reported at T2. Dysfunctional attitudes were unrelated to stress generation. Interpersonal, but not noninterpersonal, dependent stress partially mediated the relationship between initial and later depressive symptoms, with girls being more likely to generate interpersonal stress in response to depressive symptoms. Findings underscore the role of interpersonal stress generation in the early development of depressive symptomatology, and in the gender difference in depression prevalence emerging around puberty. KW - stress generation KW - depression KW - dysfunctional attitudes KW - children and adolescents KW - gender differences Y1 - 2017 U6 - https://doi.org/10.1177/0272431617725197 SN - 0272-4316 SN - 1552-5449 VL - 39 IS - 1 SP - 41 EP - 66 PB - Sage Publ. CY - Thousand Oaks ER - TY - JOUR A1 - Pourteau, Amaury A1 - Scherer, Erik E. A1 - Schorn, Simon A1 - Bast, Rebecca A1 - Schmidt, Alexander A1 - Ebert, Lisa T1 - Thermal evolution of an ancient subduction interface revealed by Lu-Hf garnet geochronology, Halilbagi Complex (Anatolia) JF - Geoscience Frontiers N2 - The thermal structure of subduction zones exerts a major influence on deep-seated mechanical and chemical processes controlling arc magmatism, seismicity, and global element cycles. Accretionary complexes exposed inland may comprise tectonic blocks with contrasting pressure-temperature (P-T) histories, making it possible to investigate the dynamics and thermal evolution of former subduction interfaces. With this aim, we present new Lu-Hf geochronological results for mafic rocks of the Halilbagi Complex (Anatolia) that evolved along different thermal gradients. Samples include a lawsonite-epidote blueschist, a lawsonite-epidote eclogite, and an epidote eclogite (all with counter-clockwise P-T paths), a prograde lawsonite blueschist with a "hairpin"-type P-T path, and a garnet amphibolite from the overlying sub-ophiolitic metamorphic sole. Equilibrium phase diagrams suggest that the garnet amphibolite formed at similar to 0.6-0.7 GPa and 800-850 degrees C, whereas the prograde lawsonite blueschist records burial from 2.1 GPa and 420 degrees C to 2.6 GPa and 520 degrees C. Well-defined Lu-Hf isochrons were obtained for the epidote eclogite (92.38 +/- 0.22 Ma) and the lawsonite-epidote blueschist (90.19 +/- 0.54 Ma), suggesting rapid garnet growth. The lawsonite-epidote eclogite (87.30 +/- 0.39 Ma) and the prograde lawsonite blueschist (ca. 86 Ma) are younger, whereas the garnet amphibolite (104.5 +/- 3.5 Ma) is older. Our data reveal a consistent trend of progressively decreasing geothermal gradient from granulite-facies conditions at similar to 104 Ma to the epidote-eclogite facies around 92 Ma, and the lawsonite blueschist-facies between 90 Ma and 86 Ma. Three Lu-Hf garnet dates (between 92 Ma and 87 Ma) weighted toward the growth of post-peak rims (as indicated by Lu distribution in garnet) suggest that the HP/LT rocks were exhumed continuously and not episodically. We infer that HP/LT metamorphic rocks within the Halilbagi Complex were subjected to continuous return flow, with "warm" rocks being exhumed during the tectonic burial of "cold" ones. Our results, combined with regional geological constraints, allow us to speculate that subduction started at a transform fault near a mid-oceanic spreading centre. Following its formation, this ancient subduction interface evolved thermally over more than 15 Myr, most likely as a result of heat dissipation rather than crustal underplating. (C) 2018, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. KW - Subduction KW - Lu/Hf dating of garnet KW - Metamorphic sole KW - Eclogite KW - Blueschist KW - Lawsonite Y1 - 2019 U6 - https://doi.org/10.1016/j.gsf.2018.03.004 SN - 1674-9871 VL - 10 IS - 1 SP - 127 EP - 148 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Coloma, Sebastian A1 - Gaedke, Ursula A1 - Sivonen, Kaarina A1 - Hiltunen, Teppo T1 - Frequency of virus-resistant hosts determines experimental community dynamics JF - Ecology : a publication of the Ecological Society of America N2 - Parasites, such as bacterial viruses (phages), can have large effects on host populations both at the ecological and evolutionary levels. In the case of cyanobacteria, phages can reduce primary production and infected hosts release intracellular nutrients influencing planktonic food web structure, community dynamics, and biogeochemical cycles. Cyanophages may be of great importance in aquatic food webs during large cyanobacterial blooms unless the host population becomes resistant to phage infection. The consequences on plankton community dynamics of the evolution of phage resistance in bloom forming cyanobacterial populations are still poorly studied. Here, we examined the effect of different frequencies of a phage-resistant genotype within a filamentous nitrogen-fixing Nodularia spumigena population on an experimental plankton community. Three Nodularia populations with different initial frequencies (0%, 5%, and 50%) of phage-resistant genotypes were inoculated in separate treatments with the phage 2AV2, the green alga Chlorella vulgaris, and the rotifer Brachionus plicatilis, which formed the experimental plankton community subjected to either nitrogen-limited or nitrogen-rich conditions. We found that the frequency of the phage-resistant Nodularia genotype determined experimental community dynamics. Cyanobacterial populations with a high frequency (50%) of the phage-resistant genotype dominated the cultures despite the presence of phages, retaining most of the intracellular nitrogen in the plankton community. In contrast, populations with low frequencies (0% and 5%) of the phage-resistant genotype were lysed and reduced to extinction by the phage, transferring the intracellular nitrogen held by Nodularia to Chlorella and rotifers, and allowing Chlorella to dominate the communities and rotifers to survive. This study shows that even though phages represent minuscule biomass, they can have key effects on community composition and eco-evolutionary feedbacks in plankton communities. KW - cyanobacteria KW - eco-evolutionary feedbacks KW - experimental evolution KW - host-parasite interaction KW - phage resistance KW - predator-prey interaction Y1 - 2018 U6 - https://doi.org/10.1002/ecy.2554 SN - 0012-9658 SN - 1939-9170 VL - 100 IS - 1 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Foster, William J. A1 - Heindel, Katrin A1 - Richoz, Sylvain A1 - Gliwa, Jana A1 - Lehrmann, Daniel J. A1 - Baud, Aymon A1 - Kolar-Jurkovsek, Tea A1 - Aljinovic, Dunja A1 - Jurkovsek, Bogdan A1 - Korn, Dieter A1 - Martindale, Rowan C. A1 - Peckmann, Jörn T1 - Suppressed competitive exclusion enabled the proliferation of Permian/Triassic boundary microbialites JF - The Depositional Record : the open access journal of the International Association of Sedimentologists N2 - During the earliest Triassic microbial mats flourished in the photic zones of marginal seas, generating widespread microbialites. It has been suggested that anoxic conditions in shallow marine environments, linked to the end-Permian mass extinction, limited mat-inhibiting metazoans allowing for this microbialite expansion. The presence of a diverse suite of proxies indicating oxygenated shallow sea-water conditions (metazoan fossils, biomarkers and redox proxies) from microbialite successions have, however, challenged the inference of anoxic conditions. Here, the distribution and faunal composition of Griesbachian microbialites from China, Iran, Turkey, Armenia, Slovenia and Hungary are investigated to determine the factors that allowed microbialite-forming microbial mats to flourish following the end-Permian crisis. The results presented here show that Neotethyan microbial buildups record a unique faunal association due to the presence of keratose sponges, while the Palaeotethyan buildups have a higher proportion of molluscs and the foraminifera Earlandia. The distribution of the faunal components within the microbial fabrics suggests that, except for the keratose sponges and some microconchids, most of the metazoans were transported into the microbial framework via wave currents. The presence of both microbialites and metazoan associations were limited to oxygenated settings, suggesting that a factor other than anoxia resulted in a relaxation of ecological constraints following the mass extinction event. It is inferred that the end-Permian mass extinction event decreased the diversity and abundance of metazoans to the point of significantly reducing competition, allowing photosynthesis-based microbial mats to flourish in shallow water settings and resulting in the formation of widespread microbialites. KW - Competitive exclusion KW - Permian KW - Triassic KW - mass extinction KW - microbialites KW - palaeoecology Y1 - 2019 U6 - https://doi.org/10.1002/dep2.97 SN - 2055-4877 VL - 6 IS - 1 SP - 62 EP - 74 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Barth, Sophia A1 - Geertsema, Marten A1 - Bevington, Alexandre R. A1 - Bird, Alison L. A1 - Clague, John J. A1 - Millard, Tom A1 - Bobrowsky, Peter T. A1 - Hasler, Andreas A1 - Liu, Hongjiang T1 - Landslide response to the 27 October 2012 earthquake (M-W 7.8), southern Haida Gwaii, British Columbia, Canada JF - Landslides : journal of the International Consortium on Landslides, ICL N2 - In this paper, we examine the influence of the 27 October 2012, M-w 7.8 earthquake on landslide occurrence in the southern half of Haida Gwaii (formerly Queen Charlotte Islands), British Columbia, Canada. Our 1350 km(2) study area is undisturbed, primarily forested terrain that has not experienced road building or timber harvesting. Our inventory of landslide polygons is based on optical airborne and spaceborne images acquired between 2007 and 2018, from which we extracted and mapped 446 individual landslides (an average of 33 landslides per 100 km(2)). The landslide rate in years without major earthquakes averages 19.4 per year, or 1.4/100 km(2)/year, and the annual average area covered by non-seismically triggered landslides is 35 ha/year. The number of landslides identified in imagery closely following the 2012 earthquake, and probably triggered by it, is 244 or an average of about 18 landslides per 100 km(2). These landslides cover a total area of 461 ha. In the following years-2013-2016 and 2016-2018-the number of landslides fell, respectively, to 26 and 13.5 landslides per year. In non-earthquake years, most landslides happen on south-facing slopes, facing the prevailing winds. In contrast, during or immediately after the earthquake, up to 32% of the landslides occurred on north and northwest-facing slopes. Although we could not find imagery from the day after the earthquake, overview reconnaissance flights 10 and 16 days later showed that most of the landslides were recent, suggesting they were co-seismic. KW - Landslide KW - Earthquake KW - British Columbia KW - Haida Gwaii Y1 - 2019 U6 - https://doi.org/10.1007/s10346-019-01292-7 SN - 1612-510X SN - 1612-5118 VL - 17 IS - 3 SP - 517 EP - 526 PB - Springer CY - Heidelberg ER - TY - JOUR A1 - Ryo, Masahiro A1 - Jeschke, Jonathan M. A1 - Rillig, Matthias C. A1 - Heger, Tina T1 - Machine learning with the hierarchy-of-hypotheses (HoH) approach discovers novel pattern in studies on biological invasions JF - Research synthesis methods N2 - Research synthesis on simple yet general hypotheses and ideas is challenging in scientific disciplines studying highly context-dependent systems such as medical, social, and biological sciences. This study shows that machine learning, equation-free statistical modeling of artificial intelligence, is a promising synthesis tool for discovering novel patterns and the source of controversy in a general hypothesis. We apply a decision tree algorithm, assuming that evidence from various contexts can be adequately integrated in a hierarchically nested structure. As a case study, we analyzed 163 articles that studied a prominent hypothesis in invasion biology, the enemy release hypothesis. We explored if any of the nine attributes that classify each study can differentiate conclusions as classification problem. Results corroborated that machine learning can be useful for research synthesis, as the algorithm could detect patterns that had been already focused in previous narrative reviews. Compared with the previous synthesis study that assessed the same evidence collection based on experts' judgement, the algorithm has newly proposed that the studies focusing on Asian regions mostly supported the hypothesis, suggesting that more detailed investigations in these regions can enhance our understanding of the hypothesis. We suggest that machine learning algorithms can be a promising synthesis tool especially where studies (a) reformulate a general hypothesis from different perspectives, (b) use different methods or variables, or (c) report insufficient information for conducting meta-analyses. KW - artificial intelligence KW - hierarchy-of-hypotheses approach KW - machine learning KW - meta-analysis KW - synthesis KW - systematic review Y1 - 2019 U6 - https://doi.org/10.1002/jrsm.1363 SN - 1759-2879 SN - 1759-2887 VL - 11 IS - 1 SP - 66 EP - 73 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - van der Kroef, Ilona A1 - Koszinski, Sylvia A1 - Grinat, Michael A1 - van der Meij, Marijn W. A1 - Hierold, Wilfried A1 - Südekum, Wolfgang A1 - Sommer, Michael T1 - Digital mapping of buried soil horizons using 2D and pseudo-3D geoelectrical measurements in a ground moraine landscape JF - European journal of soil science : EJSS N2 - The identification of buried soil horizons in agricultural landscapes helps to quantify sediment budgets and erosion-related carbon dynamics. High-resolution mapping of buried horizons using conventional soil surveys is destructive and time consuming. Geoelectrical sensors can offer a fast and non-destructive alternative for determining horizon positions and properties. In this paper, we compare the suitability of several geoelectrical methods for measuring the depth to buried horizons (Apb, Ahb and Hab) in the hummocky ground moraine landscape of northeastern Germany. Soil profile descriptions were developed for 269 locations within a 6-ha experimental field "CarboZALF-D". A stepwise linear discriminant analysis (LDA) estimated the lateral position of the buried horizons using electromagnetic induction data and terrain attributes. To predict the depth of a buried horizon, multiple linear regression (MLR) was used for both a 120-m transect and a 0.2-ha pseudo-three-dimensional (3D) area. At these scales, apparent electrical conductivity (ECa), electrical resistivity (ER) and terrain attributes were used as independent variables. The LDA accurately predicted Apb- and Ahb-horizons (a correct classification of 93%). The LDA of the Hab-horizon had a misclassification of 24%, which was probably related to the smaller test set and the higher depth of this horizon. The MLR predicted the depth of the Apb-, Ahb- and Hab-horizons with relative root mean square errors (RMSEs) of 7, 3 and 13%, respectively, in the pseudo-3D area. MLR had a lower accuracy for the 2D transect compared to the pseudo-3D area. Overall, the use of LDA and MLR has been an efficient methodological approach for predicting buried horizon positions. Highlights The suitability of geoelectrical measurements for digital modelling of diagnostic buried soil horizons was determined. LDA and MLR were used to detect multiple horizons with geoelectrical devices and terrain attributes. Geoelectrical variables were significant predictors of the position of the target soil horizons. The use of these tested digital technologies gives an opportunity to develop high-resolution soil mapping procedures. KW - colluvium depth modelling KW - electrical conductivity KW - electrical resistivity tomography KW - electromagnetic induction KW - EM38DD KW - linear discriminant analysis KW - linear regression KW - moraine soil landscape Y1 - 2019 SN - 1351-0754 SN - 1365-2389 VL - 71 IS - 1 SP - 10 EP - 26 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Schaub, Tonio A1 - Klaassen, Raymond H. G. A1 - Bouten, Willem A1 - Schlaich, Almut E. A1 - Koks, Ben J. T1 - Collision risk of Montagu’s Harriers Circus pygargus with wind turbines derived from high-resolution GPS tracking JF - Ibis : the international journal of avian science ; the journal of the British Ornithologists' Union N2 - Flight behaviour characteristics such as flight altitude and avoidance behaviour determine the species-specific collision risk of birds with wind turbines. However, traditional observational methods exhibit limited positional accuracy. High-resolution GPS telemetry represents a promising method to overcome this drawback. In this study, we used three-dimensional GPS tracking data including high-accuracy tracks recorded at 3-s intervals to investigate the collision risk of breeding male Montagu's Harriers Circus pygargus in the Dutch–German border region. Avoidance of wind turbines was quantified by a novel approach comparing observed flights to a null model of random flight behaviour. On average, Montagu's Harriers spent as much as 8.2 h per day in flight. Most flights were at low altitude, with only 7.1% within the average rotor height range (RHR; 45–125 m). Montagu's Harriers showed significant avoidance behaviour, approaching turbines less often than expected, particularly when flying within the RHR (avoidance rate of 93.5%). For the present state, with wind farms situated on the fringes of the regional nesting range, collision risk models based on our new insights on flight behaviour indicated 0.6–2.0 yearly collisions of adult males (as compared with a population size of c. 40 pairs). However, the erection of a new wind farm inside the core breeding area could markedly increase mortality (up to 9.7 yearly collisions). If repowering of the wind farms was carried out using low-reaching modern turbines (RHR 36–150 m), mortality would more than double, whereas it would stay approximately constant if higher turbines (RHR 86–200 m) were used. Our study demonstrates the great potential of high-resolution GPS tracking for collision risk assessments. The resulting information on collision-related flight behaviour allows for performing detailed scenario analyses on wind farm siting and turbine design, in contrast to current environmental assessment practices. With regard to Montagu's Harriers, we conclude that although the deployment of higher wind turbines represents an opportunity to reduce collision risk for this species, precluding wind energy developments in core breeding areas remains the most important mitigation measure. KW - avoidance rate KW - environmental impact KW - flight height KW - human-wildlife conflict KW - mitigation KW - raptors KW - renewable energy KW - wind energy Y1 - 2019 U6 - https://doi.org/10.1111/ibi.12788 SN - 0019-1019 SN - 1474-919X VL - 162 IS - 2 SP - 520 EP - 534 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Herzschuh, Ulrike T1 - Legacy of the Last Glacial on the present-day distribution of deciduous versus evergreen boreal forests JF - Global ecology and biogeography : a journal of macroecology N2 - Issue Despite their rather similar climatic conditions, eastern Eurasia and northern North America are largely covered by different plant functional types (deciduous or evergreen boreal forest) composed of larch or pine, spruce and fir, respectively. I propose that these deciduous and evergreen boreal forests represent alternative quasi-stable states, triggered by their different northern tree refugia that reflect the different environmental conditions experienced during the Last Glacial. Evidence This view is supported by palaeoecological and environmental evidence. Once established, Asian larch forests are likely to have stabilized through a complex vegetation-fire-permafrost soil-climate feedback system. Conclusion With respect to future forest developments, this implies that Asian larch forests are likely to be governed by long-term trajectories and are therefore largely resistant to natural climate variability on time-scales shorter than millennia. The effects of regional human impact and anthropogenic global warming might, however, cause certain stability thresholds to be crossed, meaning that irreversible transitions occur and resulting in marked consequences for ecosystem services on these human-relevant time-scales. KW - boreal forests KW - Glacial refugia KW - Holocene KW - Larix larch KW - permafrost ecosystems KW - Palaeoecology KW - Siberia KW - vegetation-climate-fire-soil feedbacks KW - vegetation states KW - vegetation trajectories Y1 - 2018 U6 - https://doi.org/10.1111/geb.13018 SN - 1466-822X SN - 1466-8238 VL - 29 IS - 2 SP - 198 EP - 206 PB - John Wiley & Sons, Inc. CY - Hoboken ER - TY - JOUR A1 - Roos, Saskia T1 - The Dirac operator under collapse to a smooth limit space JF - Annals of global analysis and geometry N2 - Let (M-i, g(i))(i is an element of N) be a sequence of spin manifolds with uniform bounded curvature and diameter that converges to a lower-dimensional Riemannian manifold (B, h) in the Gromov-Hausdorff topology. Then, it happens that the spectrum of the Dirac operator converges to the spectrum of a certain first-order elliptic differential operator D-B on B. We give an explicit description of D-B and characterize the special case where D-B equals the Dirac operator on B. KW - Collapse KW - Dirac operator KW - Spin geometry Y1 - 2019 U6 - https://doi.org/10.1007/s10455-019-09691-8 SN - 0232-704X SN - 1572-9060 VL - 57 IS - 1 SP - 121 EP - 151 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Engels, Stefan A1 - Medeiros, Andrew S. A1 - Axford, Yarrow A1 - Brooks, Steve A1 - Heiri, Oliver A1 - Luoto, Tomi P. A1 - Nazarova, Larisa B. A1 - Porinchu, David F. A1 - Quinlan, Roberto A1 - Self, Angela E. T1 - Temperature change as a driver of spatial patterns and long-term trends in chironomid (Insecta: Diptera) diversity JF - Global change biology N2 - Anthropogenic activities have led to a global decline in biodiversity, and monitoring studies indicate that both insect communities and wetland ecosystems are particularly affected. However, there is a need for long-term data (over centennial or millennial timescales) to better understand natural community dynamics and the processes that govern the observed trends. Chironomids (Insecta: Diptera: Chironomidae) are often the most abundant insects in lake ecosystems, sensitive to environmental change, and, because their larval exoskeleton head capsules preserve well in lake sediments, they provide a unique record of insect community dynamics through time. Here, we provide the results of a metadata analysis of chironomid diversity across a range of spatial and temporal scales. First, we analyse spatial trends in chironomid diversity using Northern Hemispheric data sets overall consisting of 837 lakes. Our results indicate that in most of our data sets, summer temperature (T-jul) is strongly associated with spatial trends in modern-day chironomid diversity. We observe a strong increase in chironomid alpha diversity with increasing T-jul in regions with present-day T-jul between 2.5 and 14 degrees C. In some areas with T-jul > 14 degrees C, chironomid diversity stabilizes or declines. Second, we demonstrate that the direction and amplitude of change in alpha diversity in a compilation of subfossil chironomid records spanning the last glacial-interglacial transition (similar to 15,000-11,000 years ago) are similar to those observed in our modern data. A compilation of Holocene records shows that during phases when the amplitude of temperature change was small, site-specific factors had a greater influence on the chironomid fauna obscuring the chironomid diversity-temperature relationship. Our results imply expected overall chironomid diversity increases in colder regions such as the Arctic under sustained global warming, but with complex and not necessarily predictable responses for individual sites. KW - Arctic KW - biodiversity KW - climate warming KW - freshwater ecosystems KW - insects KW - palaeoecology KW - Quaternary Y1 - 2019 U6 - https://doi.org/10.1111/gcb.14862 SN - 1354-1013 SN - 1365-2486 VL - 26 IS - 3 SP - 1155 EP - 1169 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Daviter, Falk T1 - Policy analysis in the face of complexity BT - What kind of knowledge to tackle wicked problems? JF - Public policy and administration N2 - An ever-increasing number of policy problems have come to be interpreted as representing a particular type of intractable, ill-structured or wicked policy problem. Much of this debate is concerned with the challenges wicked problems pose for program management rather than policy analysis. This article, in contrast, argues that the key challenge in addressing this type of policy problems is in fact analytical. Wicked policy problems are difficult to identify and interpret. The knowledge base for analysing wicked policy problem is typically fragmented and contested. Available evidence is incomplete, inconclusive and incommensurable. In this situation, the evidentiary and the interpretative elements of policy analysis become increasingly indistinguishable and inseparably intertwined. The article reveals the problems this poses for policy analysis and explores the extent to which the consolidation, consensualization and contestation of evidence in policy analysis offer alternative procedural paths to resolve these problems. KW - Evidence-based policy making KW - expertise KW - knowledge KW - policy analysis KW - wicked problems Y1 - 2017 U6 - https://doi.org/10.1177/0952076717733325 SN - 0952-0767 SN - 1749-4192 VL - 34 IS - 1 PB - Sage Publ. CY - London ER - TY - GEN A1 - Ponce, Carol Barahona A1 - Scherer, Dominique A1 - Boekstegers, Felix A1 - Garate-Calderon, Valentina A1 - Jenab, Mazda A1 - Aleksandrova, Krasimira A1 - Katzke, Verena A1 - Weiderpass, Elisabete A1 - Bonet, Catalina A1 - Moradi, Tahereh A1 - Fischer, Krista A1 - Bossers, Willem A1 - Brenner, Hermann A1 - Schöttker, Ben A1 - Holleczek, Bernd A1 - Hveem, Kristian A1 - Eklund, Niina A1 - Voelker, Uwe A1 - Waldenberger, Melanie A1 - Bermejo, Justo Lorenzo T1 - Arsenic and gallbladder cancer risk BT - Mendelian randomization analysis of European prospective data T2 - International journal of cancer KW - arsenic KW - gallbladder cancer KW - Mendelian randomization Y1 - 2019 U6 - https://doi.org/10.1002/ijc.32837 SN - 0020-7136 SN - 1097-0215 VL - 146 IS - 9 SP - 2648 EP - 2650 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Sublett, David Matthew A1 - Sendula, Eszter A1 - Lamadrid, Hector A1 - Steele-MacInnis, Matthew A1 - Spiekermann, Georg A1 - Burruss, Robert C. A1 - Bodnar, Robert J. T1 - Shift in the Raman symmetric stretching band of N-2, CO2, and CH4 as a function of temperature, pressure, and density JF - Journal of Raman spectroscopy : JRS N2 - The Raman spectra of pure N-2, CO2, and CH4 were analyzed over the range 10 to 500 bars and from -160 degrees C to 200 degrees C (N-2), 22 degrees C to 350 degrees C (CO2), and -100 degrees C to 450 degrees C (CH4). At constant temperature, Raman peak position, including the more intense CO2 peak (nu+), decreases (shifts to lower wave number) with increasing pressure for all three gases over the entire pressure and temperature (PT) range studied. At constant pressure, the peak position for CO2 and CH4 increases (shifts to higher wave number) with increasing temperature over the entire PT range studied. In contrast, N-2 first shows an increase in peak position with increasing temperature at constant pressure, followed by a decrease in peak position with increasing temperature. The inflection temperature at which the trend reverses for N-2 is located between 0 degrees C and 50 degrees C at pressures above similar to 50 bars and is pressure dependent. Below similar to 50 bars, the inflection temperature was observed as low as -120 degrees C. The shifts in Raman peak positions with PT are related to relative density changes, which reflect changes in intermolecular attraction and repulsion. A conceptual model relating the Raman spectral properties of N-2, CO2, and CH4 to relative density (volume) changes and attractive and repulsive forces is presented here. Additionally, reduced temperature-dependent densimeters and barometers are presented for each pure component over the respective PT ranges. The Raman spectral behavior of the pure gases as a function of temperature and pressure is assessed to provide a framework for understanding the behavior of each component in multicomponent N-2-CO2-CH4 gas systems in a future study. KW - fluids KW - wave number KW - attraction KW - repulsion Y1 - 2019 U6 - https://doi.org/10.1002/jrs.5805 SN - 0377-0486 SN - 1097-4555 VL - 51 IS - 3 SP - 555 EP - 568 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Stones, Rob A1 - Turner, Bryan S. T1 - Successful societies BT - Decision-making and the quality of attentiveness JF - The British journal of sociology : BJS online N2 - Combining moral philosophy with sociological theory to build on themes introduced in Hall and Lamont’s Successful Societies (2009), the paper outlines a distinctive perspective. It holds that a necessary condition of successful societies is that decision-makers base their decisions on a high level of attentiveness (concern and comprehension) towards subjectively valued and morally legitimate forms of life. Late modern societies consist of a plurality of forms of life, each providing grounds for what Alasdair MacIntyre has called internal goods—valued and morally valuable practices. The status of such goods is examined, and distinctions are drawn between their manifest and latent, and transposable and situationally specific, characteristics. We integrate this refined idea of internal goods into a developed conception of habitus that is both morally informed and situationally embedded. The sociological approach of strong structuration theory (SST) is employed to demonstrate how this conception of habitus can guide the critique of decision-making that damages internal goods. We identify the most pervasive and invidious forms of damaging decision-making in contemporary societies as those involving excessive forms of instrumental reasoning. We argue that our developed conception of habitus, anchored in the collectively valued practices of specific worlds, can be a powerful focus for resistance. Accounts of scholarship in higher education and of the white working class in America illustrate the specificities of singular, particular, social worlds and illuminate critical challenges raised by the perspective we advocate. KW - excessive instrumental reasoning KW - internal goods KW - moral philosophy KW - situationally-specific habitus KW - strong structuration theory (SST) Y1 - 2019 U6 - https://doi.org/10.1111/1468-4446.12724 SN - 0007-1315 SN - 1468-4446 VL - 71 IS - 1 SP - 183 EP - 199 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Franzke, Jochen T1 - Rezension zu: The Routledge handbook of international local government / edited by Richard Kerley, Joyce Liddle and Pamela T. Dunning. - London: Routledge, 2018. - 528 pp. - ISBN: 978- 11-3823-472-7, ISBN: 978-1-31530-627-8 JF - Local government studies N2 - When I took up the task of writing a review of the Routledge handbook of international local government, it occurred to me, as a member of the generation of the 1950s, that I had not even considered whether such compendiums were even necessary in times of easy internet searching. This review will look at whether that is indeed the case. Social-science handbooks naturally are very broad. This also applies to the particular handbook under review. It comprises six content-thematic parts with 33 chapters by 73 authors from 21 countries, with the UK and USA dominant. The focal points, discussed in more detail below, are local elections and local governance, local governments in different jurisdictions, the challenges of local government services, citizen engagement in local affairs, and local authorities in multi-level finance systems that shape how municipal governments ‘get and spend’ public money. These are exactly the topics actually discussed in the international community of political scientists. As a preliminary, the editors work out the theoretical-methodological foundations of the topic. They define ‘the local’ as ‘geographically defined sub-national state administrative or political divisions’ (p. 3). As next steps, they analyse the difference between government and governance, and investigate whether local government is globally important and relevant. Fortunately, they conclude that this is indeed the case. Part I of the handbook illustrates ‘substantive variations’ in the local electoral systems and ‘notable divergences in the values and assumptions of local governance among democratic countries’ (p. 23). That topic is indeed central to local authorities’ legitimacy in democratic political systems. The focus of this part of the handbook is on current research and debates around local electoral systems, the challenges of local political leadership and the councillor’s role in modern local policy. Current trends at the local level are analysed from the actors’ perspectives or from an economic point of view by comparing institutionalised differences in city managers, mayors and council members across different jurisdictions. Sections that investigate traditional leadership and local government in Pacific Island countries are of particular interest to most Western readers, because in Europe and North America we know too little about such issues in that part of the world. Part II of the handbook presents current development processes and challenges in various local government systems. The chapters are territorially oriented around nation states or sub-national regions. This part of the handbook deal with local government in the Pacific Islands, Latin America, and New Zealand and in the Caribbean. However, the rationale behind country selection is not always clear; important countries like China, India and Nigeria, just to name a few, are absent. Unfortunately, there is no summary article highlighting similarities and differences, as well as the challenges in local government, relating to the countries studied in the book. The development of local services is the focus of Part III of the handbook, however, the definition of local services remains highly controversial and their scope varies widely between the countries. From the 1980s onwards, there was a long-term trend towards the marketisation and economisation of local politics, but since the turn of the millennium, there has been a counter-trend of the return of municipalities and third sector in the fields of local public services (Wollmann 2018). The book analyses the US and Georgia as case studies for development trends, finding that local government entrepreneurship remains an important factor in promoting economic development and strengthening capacities. I was pleased to see that Part IV, the next and most extensive part of the handbook, deals with citizen engagement, because the future of local self-government across the world depends not only on top down activities by local governing elites, but above all on the commitment of the inhabitants of cities and municipalities. Practices and challenges of citizen participation in local government are analysed in inspiring case studies of mid-sized cities in Russia and the United States. The contribution on urban governance of austerity in Europe is also of particular interest. The 2008 global financial crash and the subsequent severe budgetary pressure on municipalities in many countries was a key event in the history and development of local self-government, confronting municipalities with ‘the harsh realities of political economy’ (p. 293). Several articles analyse the causes of the declining confidence of the citizens in local authorities in some countries. In contrast, the open budget tool in Brazil is as a positive example of collaborative stakeholder engagement. Part V deals with multi-level governance. With the exception of Australia, it is all about Europe, especially the role of municipalities in the EU’s multilevel system. The authors conclude that ‘local authorities are essential for executing EU legislation, and this turn allows them to shape EU policies’ (p. 401). This part of the handbook includes the issue of local territorial reforms, which are central to local autonomy, combined with analyses of redesigning regional government and local-level Europeanisation. Subsequently, by comparing the local government systems of Southern Europe (France, Italy, Portugal and Spain), the authors underline convincingly the role of traditions, identity, legal frameworks and institutions in local government. Part VI of the book deals with the financial dimension of local self-government under the heading ‘Getting and spending’. This is indeed the ‘key source of dispute between local and central government’ (p. 467) and the crucial factor shaping true local autonomy. Meritoriously, this part also contains a chapter on the fight against corruption and unethical behaviour by public servants. Based on research linking corruption to transparency and accountability, two case studies describe how Tbilisi (Georgia) and Lviv (Ukraine) try to reduce corruption in government budgeting and procurement. Enhancing Value-For-Money audit in local government highlights another important side of local finance. An interesting comparison reveals significant differences in local government revenues in European Union member states between 2000 and 2014. Of course, even in a 530-page book, some important aspects remain underexposed. Above all, I would have liked more attention on some of the enormous future challenges facing democratic systems and with them local governments all over the world, such as digitisation (e.g. in smart cities), the integration of migrants or climate change. The international networking of municipalities should also be given greater prominence. To sum it up, The Routledge Handbook on International Local Government is indeed ‘ambitiously titled’ as the editors underline. Yet, despite my critical objections about its focus on current issues rather than future challenges, they largely fulfil this promise and their general approach has worked well. Across continents and political-administrative cultures, illustrated with many new research findings, they have created an outstanding publication focusing on the challenges and policy of local self-governmental authorities and other local stakeholders. There is a good chance that this handbook will belong in future to the social science standard works on local issues, and be included in academic political science teaching. May the publisher’s wish come true; that this book stimulates its readers to develop further research ideas. Finally, I come back to my initial question. ‘Old fashioned’ printed handbooks like these continue to make sense, even in modern digital times. Y1 - 2019 U6 - https://doi.org/10.1080/03003930.2020.1702771 SN - 0300-3930 SN - 1743-9388 VL - 46 IS - 1 SP - 163 EP - 165 PB - Routledge CY - Abingdon ER - TY - JOUR A1 - Voigt, Christian A1 - Scholl, Julia M. A1 - Bauer, Juliane A1 - Teige, Tobias A1 - Yovel, Yossi A1 - Kramer-Schadt, Stephanie A1 - Gras, Pierre T1 - Movement responses of common noctule bats to the illuminated urban landscape JF - Landscape ecology N2 - Context Cities are a challenging habitat for obligate nocturnal mammals because of the ubiquitous use of artificial light at night (ALAN). How nocturnal animals move in an urban landscape, particularly in response to ALAN is largely unknown. Objectives We studied the movement responses, foraging and commuting, of common noctules (Nyctalus noctula) to urban landscape features in general and ALAN in particular. Methods We equipped 20 bats with miniaturized GPS loggers in the Berlin metropolitan area and related spatial positions of bats to anthropogenic and natural landscape features and levels of ALAN. Results Common noctules foraged close to ALAN only next to bodies of water or well vegetated areas, probably to exploit swarms of insects lured by street lights. In contrast, they avoided illuminated roads, irrespective of vegetation cover nearby. Predictive maps identified most of the metropolitan area as non-favoured by this species because of high levels of impervious surfaces and ALAN. Dark corridors were used by common noctules for commuting and thus likely improved the permeability of the city landscape. Conclusions We conclude that the spatial use of common noctules, previously considered to be more tolerant to light than other bats, is largely constrained by ALAN. Our study is the first individual-based GPS tracking study to show sensitive responses of nocturnal wildlife to light pollution. Approaches to protect urban biodiversity need to include ALAN to safeguard the larger network of dark habitats for bats and other nocturnal species in cities. KW - Urbanization KW - GPS tracking KW - Artificial light at night KW - ALAN KW - Habitat use KW - Preference KW - Movement KW - Common noctule bat Y1 - 2019 U6 - https://doi.org/10.1007/s10980-019-00942-4 SN - 0921-2973 SN - 1572-9761 VL - 35 IS - 1 SP - 189 EP - 201 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Fiedler, Bernhard A1 - Hainzl, Sebastian A1 - Zöller, Gert A1 - Holschneider, Matthias T1 - Detection of Gutenberg-Richter b-Value Changes in Earthquake Time Series JF - Bulletin of the Seismological Society of America N2 - The Gutenberg-Richter relation for earthquake magnitudes is the most famous empirical law in seismology. It states that the frequency of earthquake magnitudes follows an exponential distribution; this has been found to be a robust feature of seismicity above the completeness magnitude, and it is independent of whether global, regional, or local seismicity is analyzed. However, the exponent b of the distribution varies significantly in space and time, which is important for process understanding and seismic hazard assessment; this is particularly true because of the fact that the Gutenberg-Richter b-value acts as a proxy for the stress state and quantifies the ratio of large-to-small earthquakes. In our work, we focus on the automatic detection of statistically significant temporal changes of the b-value in seismicity data. In our approach, we use Bayes factors for model selection and estimate multiple change-points of the frequency-magnitude distribution in time. The method is first applied to synthetic data, showing its capability to detect change-points as function of the size of the sample and the b-value contrast. Finally, we apply this approach to examples of observational data sets for which b-value changes have previously been stated. Our analysis of foreshock and after-shock sequences related to mainshocks, as well as earthquake swarms, shows that only a portion of the b-value changes is statistically significant. Y1 - 2018 U6 - https://doi.org/10.1785/0120180091 SN - 0037-1106 SN - 1943-3573 VL - 108 IS - 5A SP - 2778 EP - 2787 PB - Seismological Society of America CY - Albany ER - TY - JOUR A1 - Tape, Ken D. A1 - Jones, Benjamin M. A1 - Arp, Christopher D. A1 - Nitze, Ingmar A1 - Grosse, Guido T1 - Tundra be dammed BT - beaver colonization of the arctic JF - Global change biology N2 - Increasing air temperatures are changing the arctic tundra biome. Permafrost is thawing, snow duration is decreasing, shrub vegetation is proliferating, and boreal wildlife is encroaching. Here we present evidence of the recent range expansion of North American beaver (Castor canadensis) into the Arctic, and consider how this ecosystem engineer might reshape the landscape, biodiversity, and ecosystem processes. We developed a remote sensing approach that maps formation and disappearance of ponds associated with beaver activity. Since 1999, 56 new beaver pond complexes were identified, indicating that beavers are colonizing a predominantly tundra region (18,293km(2)) of northwest Alaska. It is unclear how improved tundra stream habitat, population rebound following overtrapping for furs, or other factors are contributing to beaver range expansion. We discuss rates and likely routes of tundra beaver colonization, as well as effects on permafrost, stream ice regimes, and freshwater and riparian habitat. Beaver ponds and associated hydrologic changes are thawing permafrost. Pond formation increases winter water temperatures in the pond and downstream, likely creating new and more varied aquatic habitat, but specific biological implications are unknown. Beavers create dynamic wetlands and are agents of disturbance that may enhance ecosystem responses to warming in the Arctic. KW - arctic tundra KW - beaver KW - climate change KW - permafrost KW - population recovery KW - salmon KW - shrub expansion KW - stream Y1 - 2018 U6 - https://doi.org/10.1111/gcb.14332 SN - 1354-1013 SN - 1365-2486 VL - 24 IS - 10 SP - 4478 EP - 4488 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Koehler, Friedrich A1 - Koehler, Kerstin A1 - Deckwart, Oliver A1 - Prescher, Sandra A1 - Wegscheider, Karl A1 - Winkler, Sebastian A1 - Vettorazzi, Eik A1 - Polze, Andreas A1 - Stangl, Karl A1 - Hartmann, Oliver A1 - Marx, Almuth A1 - Neuhaus, Petra A1 - Scherf, Michael A1 - Kirwan, Bridget-Anne A1 - Anker, Stefan D. T1 - Telemedical Interventional Management in Heart Failure II (TIM-HF2), a randomised, controlled trial investigating the impact of telemedicine on unplanned cardiovascular hospitalisations and mortality in heart failure patients BT - study design and description of the intervention JF - European Journal of Heart Failure N2 - Background Heart failure (HF) is a complex, chronic condition that is associated with debilitating symptoms, all of which necessitate close follow-up by health care providers. Lack of disease monitoring may result in increased mortality and more frequent hospital readmissions for decompensated HF. Remote patient management (RPM) in this patient population may help to detect early signs and symptoms of cardiac decompensation, thus enabling a prompt initiation of the appropriate treatment and care before a manifestation of HF decompensation. Objective The objective of the present article is to describe the design of a new trial investigating the impact of RPM on unplanned cardiovascular hospitalisations and mortality in HF patients. Methods The TIM-HF2 trial is designed as a prospective, randomised, controlled, parallel group, open (with randomisation concealment), multicentre trial with pragmatic elements introduced for data collection. Eligible patients with HF are randomised (1:1) to either RPM + usual care or to usual care only and are followed for 12 months. The primary outcome is the percentage of days lost due to unplanned cardiovascular hospitalisations or all-cause death. The main secondary outcomes are all-cause and cardiovascular mortality. Conclusion The TIM-HF2 trial will provide important prospective data on the potential beneficial effect of telemedical monitoring and RPM on unplanned cardiovascular hospitalisations and mortality in HF patients. KW - Chronic heart failure KW - Telemonitoring KW - Remote patient management KW - Hospitalisation Y1 - 2018 U6 - https://doi.org/10.1002/ejhf.1300 SN - 1388-9842 SN - 1879-0844 VL - 20 IS - 10 SP - 1485 EP - 1493 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Franco-Obregon, Alfredo A1 - Cambria, Elena A1 - Greutert, Helen A1 - Wernas, Timon A1 - Hitzl, Wolfgang A1 - Egli, Marcel A1 - Sekiguchi, Miho A1 - Boos, Norbert A1 - Hausmann, Oliver A1 - Ferguson, Stephen J. A1 - Kobayashi, Hiroshi A1 - Würtz-Kozak, Karin T1 - TRPC6 in simulated microgravity of intervertebral disc cells JF - European Spine Journal N2 - Purpose Prolonged bed rest and microgravity in space cause intervertebral disc (IVD) degeneration. However, the underlying molecular mechanisms are not completely understood. Transient receptor potential canonical (TRPC) channels are implicated in mechanosensing of several tissues, but are poorly explored in IVDs. Methods Primary human IVD cells from surgical biopsies composed of both annulus fibrosus and nucleus pulposus (passage 1-2) were exposed to simulated microgravity and to the TRPC channel inhibitor SKF-96365 (SKF) for up to 5days. Proliferative capacity, cell cycle distribution, senescence and TRPC channel expression were analyzed. Results Both simulated microgravity and TRPC channel antagonism reduced the proliferative capacity of IVD cells and induced senescence. While significant changes in cell cycle distributions (reduction in G1 and accumulation in G2/M) were observed upon SKF treatment, the effect was small upon 3days of simulated microgravity. Finally, downregulation of TRPC6 was shown under simulated microgravity. Conclusions Simulated microgravity and TRPC channel inhibition both led to reduced proliferation and increased senescence. Furthermore, simulated microgravity reduced TRPC6 expression. IVD cell senescence and mechanotransduction may hence potentially be regulated by TRPC6 expression. This study thus reveals promising targets for future studies. KW - Intervertebral disc KW - Simulated microgravity KW - Senescence KW - TRP channels KW - Mechanotransduction KW - Gene expression Y1 - 2018 U6 - https://doi.org/10.1007/s00586-018-5688-8 SN - 0940-6719 SN - 1432-0932 VL - 27 IS - 10 SP - 2621 EP - 2630 PB - Springer CY - New York ER - TY - JOUR A1 - Hoffmann, Svenja Sarah Helen A1 - Cortes-Garcia, Laura A1 - Warschburger, Petra T1 - Weight/shape and muscularity concerns and emotional problems in adolescent boys and girls BT - A cross-lagged panel analysis JF - Journal of adolescence N2 - Introduction: The goal of the present study was to identify the prospective relations between weight/shape and muscularity concerns and emotional problems in adolescents. Methods: Self-report data of 966 German male and female adolescents were analyzed in a cross lagged panel design. Results: Analyses of latent means revealed significant correlations between weight/shape concern and emotional problems as well as between muscularity concern and emotional problems in both genders. Moreover, weight/shape concern predicted emotional problems prospectively, but only in girls. Regarding muscularity concern, we could not find any prospective relation with emotional problems In boys or girls from the general population. Conclusions: It is assumed that as appearance is highly relevant for the self-concept in girls, concerns about the look might promote emotional problems. Thus, weight/shape concern should be addressed in the prevention of emotional problems in adolescent girls, whereas further research is necessary investigating the contribution of muscularity concern in this context. KW - Weight/shape concern KW - Muscularity concern KW - Depressive symptoms KW - Adolescents KW - Cross-lagged panel analysis Y1 - 2018 U6 - https://doi.org/10.1016/j.adolescence.2018.07.005 SN - 0140-1971 SN - 1095-9254 VL - 68 SP - 70 EP - 77 PB - Elsevier CY - London ER - TY - GEN A1 - Warschburger, Petra A1 - Sproesser, Gudrun A1 - Zahn, Daniela T1 - Fachgruppe Gesundheitspsychologie: Methoden sind wichtig, Inhalte aber genauso T1 - Department of Health Psychology Methods are important, but Content is the same T2 - Psychologische Rundschau : offizielles Organ der Deutschen Gesellschaft für Psychologie Y1 - 2018 U6 - https://doi.org/10.1026/0033-3042/a000418 SN - 0033-3042 SN - 2190-6238 VL - 69 IS - 4 SP - 340 EP - 341 PB - Hogrefe CY - Göttingen ER - TY - JOUR A1 - Murray, Kendra E. A1 - Braun, Jean A1 - Reiners, Peter W. T1 - Toward Robust Interpretation of Low-Temperature Thermochronometers in Magmatic Terranes JF - Geochemistry, geophysics, geosystems N2 - Many regions central to our understanding of tectonics and landscape evolution are active or ancient magmatic terranes, and robust interpretation of low-temperature thermochronologic ages in these settings requires careful attention to the drivers of rock heating and cooling, including magmatism. However, we currently lack a quantitative framework for evaluating the potential role of magmatic coolingthat is, post-magmatic thermal relaxationin shaping cooling age patterns in regions with a history of intrusive magmatism. Here we use analytical approximations and numerical models to characterize how low-temperature thermochronometers document cooling inside and around plutons in steadily exhuming environments. Our models predict that the thermal field a pluton intrudes into, specifically the ambient temperatures relative to the closure temperature of a given thermochronometer, is as important as the pluton size and temperature in controlling the pattern and extent of thermochronometer resetting in the country rocks around a pluton. We identify one advective and several conductive timescales that govern the relationship between the crystallization and cooling ages inside a pluton. In synthetic vertical age-elevation relationships (AERs), resetting next to plutons results in changes in AER slope that could be misinterpreted as past changes in exhumation rate if the history of magmatism is not accounted for. Finally, we find that large midcrustal plutons, such as those emplaced at similar to 10-15-km depth, can reset the low-temperature thermochronometers far above them in the upper crusta result with considerable consequences for thermochronology in arcs and regions with a history of magmatic activity that may not have a surface expression. KW - He thermochronology KW - Peclet number KW - age-elevation relationships Y1 - 2018 U6 - https://doi.org/10.1029/2018GC007595 SN - 1525-2027 VL - 19 IS - 10 SP - 3739 EP - 3763 PB - American Geophysical Union CY - Washington ER - TY - JOUR A1 - Schmälzlin, Elmar Gerd A1 - Moralejo, Benito A1 - Gersonde, Ingo A1 - Schleusener, Johannes A1 - Darvin, Maxim E. A1 - Thiede, Gisela A1 - Roth, Martin M. T1 - Nonscanning large-area Raman imaging for ex vivo/in vivo skin cancer discrimination JF - Journal of biomedical optics N2 - Imaging Raman spectroscopy can be used to identify cancerous tissue. Traditionally, a step-by-step scanning of the sample is applied to generate a Raman image, which, however, is too slow for routine examination of patients. By transferring the technique of integral field spectroscopy (IFS) from astronomy to Raman imaging, it becomes possible to record entire Raman images quickly within a single exposure, without the need for a tedious scanning procedure. An IFS-based Raman imaging setup is presented, which is capable of measuring skin ex vivo or in vivo. It is demonstrated how Raman images of healthy and cancerous skin biopsies were recorded and analyzed. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. KW - Raman spectroscopy KW - cancer diagnosis KW - Raman imaging KW - multichannel KW - astronomy KW - epidermis KW - dermis Y1 - 2018 U6 - https://doi.org/10.1117/1.JBO.23.10.105001 SN - 1083-3668 SN - 1560-2281 VL - 23 IS - 10 PB - SPIE CY - Bellingham ER - TY - JOUR A1 - Mann, Michael E. A1 - Rahmstorf, Stefan A1 - Kornhuber, Kai A1 - Steinman, Byron A. A1 - Miller, Sonya K. A1 - Petri, Stefan A1 - Coumou, Dim T1 - Projected changes in persistent extreme summer weather events BT - The role of quasi-resonant amplification JF - Science Advances N2 - Persistent episodes of extreme weather in the Northern Hemisphere summer have been associated with high-amplitude quasi-stationary atmospheric Rossby waves, with zonal wave numbers 6 to 8 resulting from the phenomenon of quasi-resonant amplification (QRA). A fingerprint for the occurrence of QRA can be defined in terms of the zonally averaged surface temperature field. Examining state-of-the-art [Coupled Model Intercomparison Project Phase 5 (CMIP5)] climate model projections, we find that QRA events are likely to increase by similar to 50% this century under business-as-usual carbon emissions, but there is considerable variation among climate models. Some predict a near tripling of QRA events by the end of the century, while others predict a potential decrease. Models with amplified Arctic warming yield the most pronounced increase in QRA events. The projections are strongly dependent on assumptions regarding the nature of changes in radiative forcing associated with anthropogenic aerosols over the next century. One implication of our findings is that a reduction in midlatitude aerosol loading could actually lead to Arctic de-amplification this century, ameliorating potential increases in persistent extreme weather events. Y1 - 2018 U6 - https://doi.org/10.1126/sciadv.aat3272 SN - 2375-2548 VL - 4 IS - 10 PB - American Assoc. for the Advancement of Science CY - Washington ER - TY - GEN A1 - Henze, Andrea T1 - Proteinoxidation als Indikator des Alterungsphänotyps und Target einer individualisierten Ernährungsintervention (ProAID) T1 - Protein Oxidation as an Indicator of the Aging Phenotype and Target of an individualized Nutritional Intervention (ProAID) T2 - Ernährungs-Umschau : Forschung & Praxis N2 - Oxidative posttranslationale Modifikationen endogener Proteine werden v. a. durch reaktive Sauerstoff- und Stickstoffspezies (engl:. Reactive Oxygen Species, ROS, reactive nitrogen species, RNS) hervorgerufen und können sowohl reversibel (z. B. Disulfidbindungen) als auch irreversibel (z. B. Proteincarbonyle) erfolgen [1–3]. Lange wurde angenommen, dass oxidative posttranslationale Proteinmodifikationen (oxPTPM) nur von untergeordneter Bedeutung für den Metabolismus sind. Tatsächlich handelt es sich jedoch um einen physiologischen Prozess, der über die Modulation der Proteinstruktur auch die Proteinfunktion (z. B. Enzymaktivität, Stabilität) und somit zahlreiche Stoffwechselwege wie den Energiestoffwechsel, die Immunfunktion, die vaskuläre Funktion sowie Apoptose und Genexpression beeinflussen kann. Die Bildung von oxPTPM ist dabei hochreguliert und hängt u. a. von der Proteinstruktur, der Verfügbarkeit von ROS und RNS sowie dem lokalen Mikromilieu der Zelle ab [2, 4]. Y1 - 2018 SN - 0174-0008 VL - 65 IS - 10 SP - M566 EP - M567 PB - Umschau-Zeitschriftenverl. CY - Frankfurt, Main ER - TY - GEN A1 - Kleuser, Burkhard T1 - The enigma of sphingolipids in health and disease T2 - International journal of molecular sciences Y1 - 2018 U6 - https://doi.org/10.3390/ijms19103126 SN - 1422-0067 VL - 19 IS - 10 PB - MDPI CY - Basel ER - TY - JOUR A1 - Schotter, Elizabeth Roye A1 - Leinenger, Mallorie A1 - von der Malsburg, Titus Raban T1 - When your mind skips what your eyes fixate BT - how forced fixations lead to comprehension illusions in reading JF - Psychonomic bulletin & review : a journal of the Psychonomic Society N2 - The phenomenon of forced fixations suggests that readers sometimes fixate a word (due to oculomotor constraints) even though they intended to skip it (due to parafoveal cognitive-linguistic processing). We investigate whether this leads readers to look directly at a word but not pay attention to it. We used a gaze-contingent boundary paradigm to dissociate parafoveal and foveal information (e.g., the word phone changed to scarf once the reader's eyes moved to it) and asked questions about the sentence to determine which one the reader encoded. When the word was skipped or fixated only briefly (i.e., up to 100 ms) readers were more likely to report reading the parafoveal than the fixated word, suggesting that there are cases in which readers look directly at a word but their minds ignore it, leading to the illusion of reading something they did not fixate. KW - Word recognition KW - Text comprehension KW - Eye movements and reading Y1 - 2017 U6 - https://doi.org/10.3758/s13423-017-1356-y SN - 1069-9384 SN - 1531-5320 VL - 25 IS - 5 SP - 1884 EP - 1890 PB - Springer CY - New York ER - TY - JOUR A1 - Wathelet, Marc A1 - Guillier, B. A1 - Roux, P. A1 - Cornou, C. A1 - Ohrnberger, Matthias T1 - Rayleigh wave three-component beamforming BT - signed ellipticity assessment from high-resolution frequency-wavenumber processing of ambient vibration arrays JF - Geophysical journal international N2 - The variation of Rayleigh ellipticity versus frequency is gaining popularity in site characterization. It becomes a necessary observable to complement dispersion curves when inverting shear wave velocity profiles. Various methods have been proposed so far to extract polarization from ambient vibrations recorded on a single three-component station or with an array of three-component sensors. If only absolute values were recovered 10 yr ago, new array-based techniques were recently proposed with enhanced efficiencies providing also the ellipticity sign. With array processing, higher-order modes are often detected even in the ellipticity domain. We suggest to explore the properties of a high-resolution beamforming where radial and vertical components are explicitly included. If N is the number of three-component sensors, 2N x 2N cross-spectral density matrices are calculated for all presumed directions of propagation. They are built with N radial and N vertical channels. As a first approach, steering vectors are designed to fit with Rayleigh wave properties: the phase shift between radial and vertical components is either -Pi/2 or Pi/2. We show that neglecting the ellipticity tilt due to attenuation has only minor effects on the results. Additionally, we prove analytically that it is possible to retrieve the ellipticity value from the usual maximization of the high-resolution beam power. The method is tested on synthetic data sets and on experimental data. Both are reference sites already analysed by several authors. A detailed comparison with previous results on these cases is provided. KW - Fourier analysis KW - Time-series analysis KW - Site effects KW - Surface waves and free oscillations KW - Wave propagation Y1 - 2018 U6 - https://doi.org/10.1093/gji/ggy286 SN - 0956-540X SN - 1365-246X VL - 215 IS - 1 SP - 507 EP - 523 PB - Oxford Univ. Press CY - Oxford ER - TY - JOUR A1 - Wenger, Marina A1 - Lüdtke, Oliver A1 - Brunner, Martin T1 - Übereinstimmung, Variabilität und Reliabilität von Schülerurteilen zur Unterrichtsqualität auf Schulebene T1 - Interrater agreement, variability and reliability of student ratings of instructional quality at the school-level BT - Ergebnisse aus 81 Ländern BT - Results from 81 countries JF - Zeitschrift für Erziehungswissenschaft N2 - Für die Analyse der Unterrichtsqualität von Schulen durch Schülerurteile sollten drei Voraussetzungen erfüllt sein: (1) eine angemessene Übereinstimmung der Schülerurteile innerhalb der Schulen, (2) systematische Variabilität der Schülerurteile zwischen Schulen, (3) ein ausreichendes Maß an Reliabilität der aggregierten Urteile. Diese Studie untersucht mit internationalen PISA-Daten (Zyklen 2000–2012; 81 Länder, über 55.300 Schulen, über 1,3 Millionen 15-Jährige), inwiefern dies für Indikatoren der Qualitätsdimensionen des Unterrichts (Klassenführung, Kognitive Aktivierung, Konstruktive Unterstützung) zutrifft. Dafür bestimmten wir das Übereinstimmungsmaß rWG(J) sowie die Intraklassenkorrelationen ICC(1) und ICC(2). Es zeigte sich, dass (1) die Mehrzahl der Unterrichtsmerkmale eine moderate oder starke Übereinstimmung in Schulen aufwies, (2) sich Unterrichtsmerkmale aus Sicht der Schülerschaft systematisch zwischen Schulen unterschieden, jedoch (3) die Reliabilität der aggregierten Schülerurteile in vielen Ländern nicht ausreichte. Die Ergebnisse diskutieren wir vor dem Hintergrund von Konventionen zur Beurteilung der Übereinstimmung, Variabilität und Reliabilität auf Schulebene. N2 - Using student ratings to assess instructional quality of schools should fulfill three requirements: (1)an appropriate level of inter-rater agreement within schools, (2)systematic variance of student ratings between schools, (3)an adequate reliability level of aggregated student ratings. Using international PISA-data (2000-2012; 81countries, over 55,300 schools, over 1.3million 15-year olds) this study investigated how these requirements were met regarding indicators of instructional quality (classroom management, cognitive activation, individual learning support). We computed the interrater agreement index r(WG(J)), as well as the intraclass correlations ICC(1) and ICC(2). Our results showed that (1)student ratings demonstrated amoderate or strong level of agreement for most indicators of instructional quality and (2)instructional quality assessed by students varied systematically between schools. Yet, (3)reliability of aggregated student ratings was not sufficient in many countries. We discuss these results regarding conventions to evaluate agreement, variability, and reliability of student ratings at the school level. KW - Instructional quality KW - Student ratings KW - PISA Y1 - 2018 U6 - https://doi.org/10.1007/s11618-018-0813-3 SN - 1434-663X SN - 1862-5215 VL - 21 IS - 5 SP - 929 EP - 950 PB - Springer CY - Wiesbaden ER -