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    Global patterns in predator-pret size relationships reveal size dependency of trophic transfer effciency

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    Reuman_2010.pdf (282.8Kb)
    Issue Date
    2010-01-01
    Author
    Barnes, Carolyn
    Maxwell, David
    Reuman, Daniel C.
    Jennings, Simon
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    Copyright by the Ecological Society of America
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    Abstract
    Predator–prey body size relationships influence food chain length, trophic structure, transfer efficiency, interaction strength, and the bioaccumulation of contaminants. Improved quantification of these relationships and their response to the environment is needed to parameterize food web models and describe food web structure and function. A compiled data set comprising 29 582 records of individual prey eaten at 21 locations by individual predators that spanned 10 orders of magnitude in mass and lived in marine environments ranging from the poles to the tropics was used to investigate the influence of predator size and environment on predator and prey size relationships. Linear mixed effects models demonstrated that predator–prey mass ratios (PPMR) increased with predator mass. The amount of the increase varied among locations and predator species and individuals but was not significantly influenced by temperature, latitude, depth, or primary production. Increases in PPMR with predator mass implied nonlinear relationships between log body mass and trophic level and reductions in transfer efficiency with increasing body size. The results suggest that very general rules determine dominant trends in PPMR in diverse marine ecosystems, leading to the ubiquity of size-based trophic structuring and the consistency of observed relationships between the relative abundance of individuals and their body size.
    URI
    http://hdl.handle.net/1808/21116
    DOI
    https://doi.org/10.1890/08-2061.1
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1493]
    Citation
    Barnes, C., Maxwell, D., Reuman, D. C. and Jennings, S. (2010), Global patterns in predator–prey size relationships reveal size dependency of trophic transfer efficiency. Ecology, 91: 222–232. doi:10.1890/08-2061.1

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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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