Pervasive influence of large-scale climate in the dynamics of a terrestrial vertebrate community |
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Authors: | Eric Post Mads C Forchhammer |
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Institution: | (1) Department of Biology, The Pennsylvania State University, 208 Mueller Lab, University Park, PA 16802, USA;(2) Department of Population Ecology, Zoological Institute, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark |
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Abstract: | Background Large-scale climatic variability has been implicated in the population dynamics of many vertebrates throughout the Northern Hemisphere, but has not been demonstrated to directly influence dynamics at multiple trophic levels of any single system. Using data from Isle Royale, USA, comprising time series on the long-term dynamics at three trophic levels (wolves, moose, and balsam fir), we analyzed the relative contributions of density dependence, inter-specific interactions, and climate to the dynamics of each level of the community. |
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