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    Herbivore metabolism and stoichiometry each constrain herbivory at different organizational scales across ecosystems

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    Date
    2009
    Author
    Hillebrand, Helmut
    Borer, Elizabeth
    Bracken, Matthew
    Cardinale, Brad
    Cebrian, Just
    Cleland, Elsa
    Elser, James
    Gruner, Daniel
    Harpole, Stanley
    Ngai, Jackie
    Sandin, Stuart
    Seabloom, Eric
    Shurin, Jonathan
    Smith, Jennifer
    Smith, Melinda
    Citation
    Hillebrand, H., E. T. Borer, M. E. S. Bracken, B. J. Cardinale, J. Cebrian, E. E. Cleland, J. J. Elser, D. S. Gruner, W. S. Harpole, J. T. Ngai, S. Sandin, E. W. Seabloom, J. B. Shurin, J. E. Smith, and M. D. Smith. 2009. Herbivore metabolism and stoichiometry each constrain herbivory at different organizational scales across ecosystems. Ecology Letters 12:516-527
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    Abstract
    Plant-herbivore interactions mediate the trophic structure of ecosystems. We use a comprehensive data set extracted from the literature to test the relative explanatory power of two contrasting bodies of ecological theory, the metabolic theory of ecology (MTE) and ecological stoichiometry (ES), for per-capita and population-level rates of herbivory across ecosystems. We found that ambient temperature and herbivore body size (MTE) as well as stoichiometric mismatch (ES) both constrained herbivory, but at different scales of biological organization. Herbivore body size, which varied over 11 orders of magnitude, was the primary factor explaining variation in per-capita rates of herbivory. Stoichiometric mismatch explained more variation in population-level herbivory rates and also in per-capita rates when we examined data from within functionally similar trophic groups (e.g. zooplankton). Thus, predictions from metabolic and stoichiometric theories offer complementary explanations for patterns of herbivory that operate at different scales of biological organization.
    URI
    http://hdl.handle.net/1903/9414
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    DRUM is brought to you by the University of Maryland Libraries
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