TY  - JOUR
A1  - Paeschke, Manfred
A1  - Wollenberger, Ursula
A1  - Uhlig, A.
A1  - Schnakenberg, Uwe
A1  - Wagner, B.
A1  - Hintsche, R.
T1  - A stacked multichannel amperometric detection system
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Paeschke, Manfred
A1  - Wollenberger, Ursula
A1  - Köhler, C.
A1  - Lisec, T.
A1  - Schnakenberg, Uwe
A1  - Wagner, B.
T1  - Properties of interdigital electrode arrays with different geometries
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Stein, Claudia
A1  - Unsicker, Sybille B.
A1  - Kahmen, Ansgar
A1  - Wagner, Markus
A1  - Audorff, Volker
A1  - Auge, Harald
A1  - Prati, Daniel
A1  - Weisser, Wolfgang W.
T1  - Impact of invertebrate herbivory in grasslands depends on plant species diversity
N2  - Invertebrate herbivores are ubiquitous in most terrestrial ecosystems, and theory predicts that their impact on plant community biomass should depend on diversity and productivity of the associated plant communities. To elucidate general patterns in the relationship between invertebrate herbivory, plant diversity, and productivity, we carried out a long-term herbivore exclusion experiment at multiple grassland sites in a mountainous landscape of central Germany. Over a period of five years, we used above-and belowground insecticides as well as a molluscicide to manipulate invertebrate herbivory at 14 grassland sites, covering a wide range of plant species diversity (13-38 species/m(2)) and aboveground plant productivity (272-1125 g.m(-2).yr(-1)), where plant species richness and productivity of the sites were not significantly correlated. Herbivore exclusion had significant effects on the plant communities: it decreased plant species richness and evenness, and it altered plant community composition. In particular, exclusion of belowground herbivores promoted grasses at the expense of herbs. In contrast to our expectation, herbivore effects on plant community biomass were not influenced by productivity. However, effect size of invertebrate herbivores was negatively correlated with plant diversity of the grasslands: the effect of herbivory on biomass tended to be negative at sites of high diversity and positive at sites of low diversity. In general, the effects of aboveground herbivores were relatively small as compared to belowground herbivores, which were important drivers of plant community composition. Our study is the first to show that variation in the effects of invertebrate herbivory on plant communities across a landscape is significantly influenced by plant species richness.
Y1  - 2010
UR  - http://esapubs.org/esapubs/journals/ecology.htm
U6  - https://doi.org/10.1890/09-0600.1
SN  - 0012-9658
ER  - 
TY  - JOUR
A1  - Andreev, Andrei
A1  - Nazarova, Larisa B.
A1  - Lenz, Marlene M.
A1  - Böhmer, Thomas
A1  - Syrykh, Ludmila
A1  - Wagner, Bernd
A1  - Melles, Martin
A1  - Pestryakova, Luidmila A.
A1  - Herzschuh, Ulrike
T1  - Late Quaternary paleoenvironmental reconstructions from sediments of Lake Emanda (Verkhoyansk Mountains, East Siberia)
JF  - Journal of quaternary science : JQS
N2  - Continuous pollen and chironomid records from Lake Emanda (65 degrees 17'N, 135 degrees 45'E) provide new insights into the Late Quaternary environmental history of the Yana Highlands (Yakutia). Larch forest with shrubs (alders, pines, birches) dominated during the deposition of the lowermost sediments suggesting its Early Weichselian [Marine Isotope Stage (MIS) 5] age. Pollen- and chironomid-based climate reconstructions suggest July temperatures (T-July) slightly lower than modern. Gradually increasing amounts of herb pollen and cold stenotherm chironomid head capsules reflect cooler and drier environments, probably during the termination of MIS 5. T-July dropped to 8 degrees C. Mostly treeless vegetation is reconstructed during MIS 3. Tundra and steppe communities dominated during MIS 2. Shrubs became common after similar to 14.5 ka BP but herb-dominated habitats remained until the onset of the Holocene. Larch forests with shrub alder and dwarf birch dominated after the Holocene onset, ca. 11.7 ka BP. Decreasing amounts of shrub pollen during the Lateglacial are assigned to the Older Dryas and Younger Dryas with T-July similar to 7.5 degrees C. T-July increased up to 13 degrees C. Shrub stone pine was present after similar to 7.5 ka BP. The vegetation has been similar to modern since ca. 5.8 ka BP. Chironomid diversity and concentration in the sediments increased towards the present day, indicating the development of richer hydrobiological communities in response to the Holocene thermal maximum.
KW  - chironomids
KW  - environmental reconstructions
KW  - Late Quaternary
KW  - pollen
Y1  - 2022
U6  - https://doi.org/10.1002/jqs.3419
SN  - 0267-8179
SN  - 1099-1417
VL  - 37
IS  - 5
SP  - 884
EP  - 899
PB  - Wiley
CY  - New York, NY [u.a.]
ER  -