@misc{KayserAgtheManer2016,
  author    = {Kayser, Daniela Niesta and Agthe, Maria and Maner, Jon K.},
  title     = {Strategic sexual signals},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwisseschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwisseschaftliche Reihe},
  number    = {513},
  issn      = {1866-8364},
  doi       = {10.25932/publishup-41188},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-411880},
  pages     = {10},
  year      = {2016},
  abstract  = {The color red has special meaning in mating-relevant contexts. Wearing red can enhance perceptions of women's attractiveness and desirability as a potential romantic partner. Building on recent findings, the present study examined whether women's (N = 74) choice to display the color red is influenced by the attractiveness of an expected opposite-sex interaction partner. Results indicated that female participants who expected to interact with an attractive man displayed red (on clothing, accessories, and/or makeup) more often than a baseline consisting of women in a natural environment with no induced expectation. In contrast, when women expected to interact with an unattractive man, they eschewed red, displaying it less often than in the baseline condition. Findings are discussed with respect to evolutionary and cultural perspectives on mate evaluation and selection.},
  language  = {en}
}
@misc{BochMuellerPratietal.2018,
  author    = {Boch, Steffen and M{\"u}ller, J{\"o}rg and Prati, Daniel and Fischer, Markus},
  title     = {Low-intensity management promotes bryophyte diversity in grasslands},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {1049},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-46008},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-460086},
  pages     = {311 -- 328},
  year      = {2018},
  abstract  = {Bryophytes constitute an important and permanent component of the grassland flora and diversity in Europe. As most bryophyte species are sensitive to habitat change, their diversity is likely to decline following land-use intensification. Most previous studies on bryophyte diversity focused on specific habitats of high bryophyte diversity, such as bogs, montane grasslands, or calcareous dry grasslands. In contrast, mesic grasslands are rarely studied, although they are the most common grassland habitat in Europe. They are secondary vegetation, maintained by agricultural use and thus, are influenced by different forms of land use. We studied bryophyte species richness in three regions in Germany, in 707 plots of 16 m2 representing different land-use types and environmental conditions. Our study is one of the few to inspect the relationships between bryophyte richness and land use across contrasting regions and using a high number of replicates.Among the managed grasslands, pastures harboured 2.5 times more bryophyte species than mead-ows and mown pastures. Similarly, bryophyte cover was about twice as high in fallows and pastures than in meadows and mown pastures. Among the pastures, bryophyte species richness was about three times higher in sheep grazed plots than in the ones grazed by cattle or horses. In general, bryophyte species richness and cover was more than 50\% lower in fertilized than in unfertilized plots. Moreover, the amount of suitable substrates was linked to bryophyte diversity. Species richness of bryophytes growing on stones increased with stone cover, and the one of bryophytes growing on bark and deadwood increased with larger values of woody plant species and deadwood cover. Our findings highlight the importance of low-intensity land use and high structural heterogeneity for bryophyte conservation. They also caution against an intensification of traditionally managed pastures. In the light of our results, we recommend to maintain low-intensity sheep grazing on sites with low productivity, such as slopes on shallow soils.},
  language  = {en}
}
@phdthesis{Geissler2008,
  author    = {Geißler, Katja},
  title     = {Lebensstrategien seltener Stromtalpflanzen : aut{\"o}kologische Untersuchung von Cnidium dubium, Gratiola officinalis und Juncus atratus unter besonderer Ber{\"u}cksichtigung ihrer Stressresistenz},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17468},
  school      = {Universit{\"a}t Potsdam},
  year      = {2008},
  abstract  = {Die vorliegende Dissertation behandelt die {\"O}kologie von Cnidium dubium (Schkuhr) Thell. (Sumpf-Brenndolde), Gratiola officinalis L. (Gottes-Gnadenkraut) und Juncus atratus Krocker (Schwarze Binse), drei gef{\"a}hrdeten Arten, die als sogenannte Stromtalpflanzen in Mitteleuropa in ihrem Vorkommen eng an die Flussauen gebunden sind. Die Arbeit basiert auf verschiedenen Simulationsexperimenten und Feldstudien in der Unteren Havelniederung, einem „Feuchtgebiet von internationaler Bedeutung". Sie behandelt Themenkomplexe wie das Samenbankverhalten, die Samenkeimung, die Stickstofflimitierung, die Konkurrenzkraft, das Verhalten der Pflanzen nach einer Sommertrockenheit und nach einer Winter/Fr{\"u}hjahrs{\"u}berflutung. Ferner widmet sie sich der Populationsbiologie der Arten und dem Verhalten der Pflanzen nach besonderen St{\"o}rungsereignissen wie Mahd, Herbivorie und der Sommerflut 2002. Der Leser erf{\"a}hrt, wie die Pflanzen in verschiedenen Lebensphasen auf die auentypische Umwelt reagieren und erh{\"a}lt umfassende Einblicke in physiologische Mechanismen, die der Anpassung an die typischen Bedingungen einer mitteleurop{\"a}ischen Flussaue dienen. Eine Interpretation der Ergebnisse zeigt auf, welche der spezifischen Eigenschaften zur Gef{\"a}hrdung der drei Stromtalarten beitragen. Die Arbeit ist f{\"u}r den Arten-, Biotop- und Landschaftsschutz interessant. Dar{\"u}ber hinaus bietet sie zahlreiche Ankn{\"u}pfungspunkte zur {\"o}kophysiologischen Grundlagenforschung. Die verst{\"a}rkte Nutzung physiologischer Methoden bei der Kl{\"a}rung {\"o}kologischer Fragestellungen wird angeregt.},
  language  = {de}
}
@misc{MakowiczTiedemannSteeleetal.2016,
  author    = {Makowicz, Amber M. and Tiedemann, Ralph and Steele, Rachel N. and Schlupp, Ingo},
  title     = {Kin recognition in a clonal fish, Poecilia formosa},
  series = {PLoS ONE},
  journal   = {PLoS ONE},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-411329},
  pages     = {20},
  year      = {2016},
  abstract  = {Relatedness strongly influences social behaviors in a wide variety of species. For most species, the highest typical degree of relatedness is between full siblings with 50\% shared genes. However, this is poorly understood in species with unusually high relatedness between individuals: clonal organisms. Although there has been some investigation into clonal invertebrates and yeast, nothing is known about kin selection in clonal vertebrates. We show that a clonal fish, the Amazon molly (Poecilia formosa), can distinguish between different clonal lineages, associating with genetically identical, sister clones, and use multiple sensory modalities. Also, they scale their aggressive behaviors according to the relatedness to other females: they are more aggressive to non-related clones. Our results demonstrate that even in species with very small genetic differences between individuals, kin recognition can be adaptive. Their discriminatory abilities and regulation of costly behaviors provides a powerful example of natural selection in species with limited genetic diversity.},
  language  = {en}
}
@misc{HegerNiklesJacobs2018,
  author    = {Heger, Tina and Nikles, Gabriele and Jacobs, Brooke S.},
  title     = {Differentiation in native as well as introduced ranges},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe},
  number    = {650},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-42464},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-424642},
  pages     = {12},
  year      = {2018},
  abstract  = {Germination, a crucial phase in the life cycle of a plant, can be significantly influenced by competition and facilitation. The aim of this study was to test whether differences in cover of surrounding vegetation can lead to population differentiation in germination behaviour of an annual grassland species, and if so, whether such a differentiation can be found in the native as well as in the introduced range. We used maternal progeny of Erodium cicutarium previously propagated under uniform conditions that had been collected in multiple populations in the native and two introduced ranges, in populations representing extremes in terms of mean and variability of the cover of surrounding vegetation. In the first experiment, we tested the effect of germination temperature and mean cover at the source site on germination, and found interlinked effects of these factors. In seeds from one of the introduced ranges (California), we found indication for a 2-fold dormancy, hindering germination at high temperatures even if physical dormancy was broken and water was available. This behaviour was less strong in high cover populations, indicating cross-generational facilitating effects of dense vegetation. In the second experiment, we tested whether spatial variation in cover of surrounding vegetation has an effect on the proportion of dormant seeds. Contrary to our expectations, we found that across source regions, high variance in cover was associated with higher proportions of seeds germinating directly after storage. In all three regions, germination seemed to match the local environment in terms of climate and vegetation cover. We suggest that this is due to a combined effect of introduction of preadapted genotypes and local evolutionary processes.},
  language  = {en}
}
@misc{Ansel2015,
  type      = {Master Thesis},
  author    = {Ansel, Simon},
  title     = {Die Diffusion von Innovationen in deutschen Kommunen},
  issn      = {2190-4561},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80370},
  school      = {Universit{\"a}t Potsdam},
  pages     = {IV, 67},
  year      = {2015},
  abstract  = {Die fortschreitende Diffusion von E-Government ist ein Ph{\"a}nomen, dem in der internationa-len Forschungsliteratur bereits viel Aufmerksamkeit zu Teil wurde. Erstaunlich wenige Studien widmen sich bislang jedoch dezidiert dem Faktor Interdependenz, der eigentlichen Ursache von Diffusionsprozessen. In dieser Arbeit werden Interdependenzbeziehungen anhand dreier spezifischer Mechanismen der Diffusion, namentlich „Nachahmung", „Wettbewerb" und „Lernen", untersucht. Auf Basis einer empirischen Analyse mit Daten zur Einf{\"u}hrung von E-Government-Komponenten in 183 deutschen St{\"a}dten {\"u}ber den Zeitraum von 1995 bis 2014 konnte ein Einfluss der Mechanismen „Nachahmung" und „Lernen" auf das Innovationsverhalten von Kommunen festgestellt werden. F{\"u}r das Vorliegen von Wettbe-werbsdynamiken ließen sich demgegen{\"u}ber keine Anhaltspunkte finden. F{\"u}r zuk{\"u}nftige Forschungen zur Diffusion von Innovationen wird angeregt, verst{\"a}rkt an die mechanismen- und prozessbasierte Perspektive von Diffusion als theoretischem Rahmenkonzept anzukn{\"u}pfen.},
  language  = {de}
}