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    Toward an integration of landscape and food web ecology: The dynamics of spatially subsidized food webs

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    annurev.ecolsys.28.1.pdf (197.5Kb)
    Issue Date
    1997
    Author
    Polis, Gary A.
    Anderson, Wendy B.
    Holt, Robert D.
    Publisher
    Annual Reviews
    Format
    202257 bytes
    Type
    Article
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    Abstract
    We focus on the implications of movement, landscape variables, and spatial heterogeneity for food web dynamics. Movements of nutrients, detritus, prey, and consumers among habitats are ubiquitous in diverse biomes and can strongly influence population, consumer-resource, food web, and community dynamics. Nutrient and detrital subsidies usually increase primary and secondary productivity, both directly and indirectly. Prey subsidies, by movement of either prey or predators, usually enhance predator abundance beyond what local resources can support. Top-down effects occur when spatially subsidized consumers affect local resources by suppressing key resources and occasionally by initiating trophic cascades. Effects on community dynamics vary with the relative amount of input, the trophic roles of the mobile and recipient entities, and the local food web structure. Landscape variables such as the perimeter/area ratio of the focal habitat, permeability of habitat boundaries, and relative productivity of trophically connected habitats affect the degree and importance of spatial subsidization.
    URI
    http://hdl.handle.net/1808/817
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    • Ecology & Evolutionary Biology Scholarly Works [1497]
    Citation
    Polis, Gary A; Anderson, Wendy B; Holt, Robert D. Toward an integration of landscape and food web ecology: The dynamics of spatially subsidized food webs. Annual Reviews of Ecology and Systematics. 28(1) : 289-316.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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