期刊
ECOLOGY
卷 90, 期 11, 页码 3099-3107出版社
ECOLOGICAL SOC AMER
DOI: 10.1890/08-2377.1
关键词
Brachionus calyciflorus; Chlamydomonas reinhardtii; environmental forcing; periodic mortality; phytoplankton; predator-prey dynamics; seasonal succession; seasonality; transient dynamics; zooplankton
类别
资金
- National Science Foundation [DEB-0610532]
- James S. McDonnell Foundation
- German Research Foundation (DFG) [SPP 1162]
- German Academic Exchange Service (DAAD)
Despite the recognition of the importance of seasonal forcing in nature, remarkably few studies have theoretically explored periodically forced community dynamics. Here we employ a novel approach called successional state dynamics'' (SSD) to model a seasonally forced predator-prey system. We first generated analytical predictions of the effects of altered seasonality on species persistence and the timing of community state transitions. We then parameterized the model using a zooplankton-phytoplankton system and tested quantitative predictions using controlled experiments. In the majority of cases, timing of zooplankton and algal population peaks matched model predictions. Decreases in growing-period length delayed algal blooms, consequently delaying peaks in zooplankton abundance. Predictions of increased probability of predator extinction at low growing-period lengths were also upheld experimentally. Our results highlight the utility of the SSD modeling approach as a framework for predicting the effects of altered seasonality on the structure and dynamics of multitrophic communities.
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