Rights statement: This is the peer reviewed version of the following article: Perkins, D. M., Durance, I. , Edwards, F. K., Grey, J. , Hildrew, A. G., Jackson, M. , Jones, J. I., Lauridsen, R. B., Layer‐Dobra, K. , Thompson, M. S. and Woodward, G. (2018), Bending the rules: exploitation of allochthonous resources by a top‐predator modifies size‐abundance scaling in stream food webs. Ecol Lett, 21: 1771-1780. doi:10.1111/ele.13147 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1111/ele.13147 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Bending the rules
T2 - exploitation of allochthonous resources by a top-predator modifies size-abundance scaling in stream food webs
AU - Perkins, Daniel M.
AU - Durance, Isabelle
AU - Edwards, Francois K.
AU - Grey, Jonathan
AU - Hildrew, Alan G.
AU - Jackson, Michelle
AU - Jones, J. Iwan
AU - Lauridsen, Rasmus B.
AU - Layer-Dobra, Katrin
AU - Thompson, Murray S. A.
AU - Woodward, Guy
N1 - This is the peer reviewed version of the following article: Perkins, D. M., Durance, I. , Edwards, F. K., Grey, J. , Hildrew, A. G., Jackson, M. , Jones, J. I., Lauridsen, R. B., Layer‐Dobra, K. , Thompson, M. S. and Woodward, G. (2018), Bending the rules: exploitation of allochthonous resources by a top‐predator modifies size‐abundance scaling in stream food webs. Ecol Lett, 21: 1771-1780. doi:10.1111/ele.13147 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1111/ele.13147 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Body mass–abundance (M‐N) allometries provide a key measure of community structure, and deviations from scaling predictions could reveal how cross‐ecosystem subsidies alter food webs. For 31 streams across the UK, we tested the hypothesis that linear log‐log M‐N scaling is shallower than that predicted by allometric scaling theory when top predators have access to allochthonous prey. These streams all contained a common and widespread top predator (brown trout) that regularly feeds on terrestrial prey and, as hypothesised, deviations from predicted scaling increased with its dominance of the fish assemblage. Our study identifies a key beneficiary of cross‐ecosystem subsidies at the top of stream food webs and elucidates how these inputs can reshape the size‐structure of these ‘open’ systems.
AB - Body mass–abundance (M‐N) allometries provide a key measure of community structure, and deviations from scaling predictions could reveal how cross‐ecosystem subsidies alter food webs. For 31 streams across the UK, we tested the hypothesis that linear log‐log M‐N scaling is shallower than that predicted by allometric scaling theory when top predators have access to allochthonous prey. These streams all contained a common and widespread top predator (brown trout) that regularly feeds on terrestrial prey and, as hypothesised, deviations from predicted scaling increased with its dominance of the fish assemblage. Our study identifies a key beneficiary of cross‐ecosystem subsidies at the top of stream food webs and elucidates how these inputs can reshape the size‐structure of these ‘open’ systems.
KW - Allometric scaling
KW - body size
KW - brown trout
KW - energetic subsidies
KW - food webs
KW - metabolic theory
KW - stable isotopes
KW - streams
U2 - 10.1111/ele.13147
DO - 10.1111/ele.13147
M3 - Journal article
VL - 21
SP - 1771
EP - 1780
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 12
ER -