Propagation of variability patterns from individual populations to complex food webs - analysis of plankton time-series Marcia Rocha May 21, 2008, 2:30pm Building 19, Room 4.15 University Potsdam, Campus Neues Palais Abstract:Variability patterns of natural populations and communities are of focal interest e.g. within the ongoing biodiversity-stability debate. On one hand, the sum of independently fluctuating populations is more stable if the community is more diverse - portfolio effect - and on the other hand, functional complementarities lead to a more stable community. Extending previous research, we aim to study variability patterns at different temporal scales at the level of individual phyto- and zooplankton populations, how they are related to ecological characteristics of the species and trophic interactions within the food web, and how they propagate to the level of functional groups, communities and the entire food web. Temporal variability of plankton populations, communities and related variables will be investigated through the spectral analysis of long-term time series of plankton of the Lake Konstanz, Germany.