Intensification of weather extremes is currently emerging as one of the most important aspects of Climate Change. Surprisingly, the significance of extreme events for vegetation dynamics and ecological processes still is underrated, although their effects are obvious and out of proportion compared to their short duration of occurrence. Some work is done already concerning changes in mean temperature or mean CO2-level. However, we propose that extreme events are even more important for vegetation response.
Therefore we have installed a field experiment in 2005 at the University of Bayreuth, Germany, where we experimentally apply expected extreme events like drought, intense rain and more numerous freeze-thaw cycles to different plant communities. Together with different control treatments this experiment gives us a powerful tool to evaluate the effects of extreme climatic events. As communities might vary in their stability against extreme events, grassland and dwarf-shrub communities have been chosen to evaluate systems differing in their longevity and productivity. Within the systems we compare the performance with one (only grasses in grassland and only dwarf-shrubs in heath) and two functional groups (grasses and herbs in grassland and dwarf shrubs and grasses in heath) to address the importance of functional group performance for buffering against extremes
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|Jentsch, A; Kreyling, J; Böttcher-Treschkow, J; Beierkuhnlein, C: Beyond gradual warming: extreme weather events alter flower phenology of European grassland and heath species, Global Change Biology, 15(4), 837-849 (2009), doi:10.1111/j.1365-2486.2008.01690.x -- Details|
|Kreyling, J; Wenigmann, M; Beierkuhnlein, C; Jentsch, A: Effects of extreme weather events on plant productivity and tissue die-back are modified by community composition, Ecosystems, 11, 752-763 (2008), doi:10.1007/s10021-008-9157-9 -- Details|
|Kreyling, J; Beierkuhnlein, C; Pritsch, K; Schloter, M; Jentsch, A: Recurrent soil freeze-thaw cycles enhance grassland productivity, New Phytologist, 177, 938-945 (2008), doi:10.1111/j.1469-8137.2007.02309.x -- Details|
|Mirzaei, H; Kreyling, J; Hussain, MZ; Li, Y; Tenhunen, JD; Beierkuhnlein, C; Jentsch, A: A single drought event of 100-year recurrence enhances subsequent carbon uptake and changes carbon allocation in experimental grassland communities, Journal of Plant Nutrition and Soil Science, 171, 681-689 (2008), doi:10.1002/jpln.200700233 -- Details|
|Kreyling, J; Beierkuhnlein, C; Elmer, M; Pritsch, K; Radovski, M; Schloter, M; Wöllecke, J; Jentsch, A: Soil biotic processes remain surprisingly stable in face of 100-year extreme weather events in experimental grassland and heath, Plant and Soil, 308(1-2), 175-188 (2008), doi:10.1007/s11104-008-9617-1 -- Details|
|Jentsch, A; Kreyling, J; Schmid, N; Grant, K; Gommola, J; Beierkuhnlein, C: Dürre und Starkregen verschieben Blühphänologie und Produktivität von Pflanzen - ein Klimaexperiment zur Auswirkung extremer Wetterereignisse auf Biodiversität und Ökosystemfunktionen, Naturschutz und Biologische Vielfalt. Schriftenreihe des Bundesamtes für Naturschutz(60), 81-86 (2008)|
|Kreyling, J; Beierkuhnlein, C; Ellis, L; Jentsch, A: Invasibility of grassland and heath communities exposed to extreme weather events - additive effects of biotic resistance and fluctuating physical environment, Oikos, 117(10), 1542-1554 (2008) -- Details|
|Jentsch, A; Kreyling, J; Beierkuhnlein, C: A new generation of climate change experiments: Events, not trends, Frontiers in Ecology and the Environment, 5(7), 365-374 (2007), doi:10.1890/1540-9295(2007)5[365:ANGOCE]2.0.CO;2 -- Details|
Human-Wildlife Conflicts (HWC) in Southern Africa
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