@article{CorneliusLeingaertnerHoissetal.2012, author = {Cornelius, C. and Leing{\"a}rtner, A. and Hoiss, B. and Krauss, J. and Steffan-Dewenter, I. and Menzel, A.}, title = {Phenological response of grassland species to manipulative snowmelt and drought along an altitudinal gradient}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-77969}, year = {2012}, abstract = {Plant communities in the European Alps are assumed to be highly affected by climate change since temperature rise in this region is above the global average. It is predicted that higher temperatures will lead to advanced snowmelt dates and that the number of extreme weather events will increase. The aims of this study were to determine the impacts of extreme climatic events on flower phenology and to assess whether those impacts differed between lower and higher altitudes. In 2010 an experiment simulating advanced and delayed snowmelt as well as drought event was conducted along an altitudinal transect ca. every 250m (600-2000 m a.s.l.) in the Berchtesgaden National Park, Germany. The study showed that flower phenology is strongly affected by altitude; however there were few effects of the manipulative treatments on flowering. The effects of advanced snowmelt were significantly greater at higher than at lower sites, but no significant difference was found between both altitudinal bands for the other treatments. The response of flower phenology to temperature declined through the season and the length of flowering duration was not significantly influenced by treatments. The stronger effect of advanced snowmelt at higher altitudes might be a response to differences in treatment intensity across the gradient. Consequently, shifts in the date of snowmelt due to global warming may affect species more at higher than at lower altitudes since changes may be more pronounced at higher altitudes. Our data indicate a rather low risk of drought events on flowering phenology in the Bavarian Alps.}, subject = {Biologie}, language = {en} } @article{AlbrechtClassenVollstaedtetal.2018, author = {Albrecht, J{\"o}rg and Classen, Alice and Vollst{\"a}dt, Maximilian G.R. and Mayr, Antonia and Mollel, Neduvoto P. and Schellenberger Costa, David and Dulle, Hamadi I. and Fischer, Markus and Hemp, Andreas and Howell, Kim M. and Kleyer, Michael and Nauss, Thomas and Peters, Marcell K. and Tschapka, Marco and Steffan-Dewenter, Ingolf and B{\"o}hning-Gaese, Katrin and Schleuning, Matthias}, title = {Plant and animal functional diversity drive mutualistic network assembly across an elevational gradient}, series = {Nature Communications}, volume = {9}, journal = {Nature Communications}, doi = {10.1038/s41467-018-05610-w}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-221056}, pages = {1-10}, year = {2018}, abstract = {Species' functional traits set the blueprint for pair-wise interactions in ecological networks. Yet, it is unknown to what extent the functional diversity of plant and animal communities controls network assembly along environmental gradients in real-world ecosystems. Here we address this question with a unique dataset of mutualistic bird-fruit, bird-flower and insect-flower interaction networks and associated functional traits of 200 plant and 282 animal species sampled along broad climate and land-use gradients on Mt. Kilimanjaro. We show that plant functional diversity is mainly limited by precipitation, while animal functional diversity is primarily limited by temperature. Furthermore, shifts in plant and animal functional diversity along the elevational gradient control the niche breadth and partitioning of the respective other trophic level. These findings reveal that climatic constraints on the functional diversity of either plants or animals determine the relative importance of bottom-up and top-down control in plant-animal interaction networks.}, language = {en} }