000028342 001__ 28342
000028342 005__ 20131002113955.0
000028342 0248_ $$aoai:doc.rero.ch:20120125083347-OF$$punifr$$ppostprint$$prero_explore$$zcdu34$$zthesis_urn$$zreport$$zthesis$$zbook$$zjournal$$zcdu574$$zcdu16$$zpreprint$$zcdu1$$zdissertation
000028342 041__ $$aeng
000028342 080__ $$a574
000028342 100__ $$aNaisbit, Russell E.$$uUnit of Ecology and Evolution, Department of Biology, University of Fribourg, Switzerland - Institute of Biology, University of Neuchâtel, Switzerland
000028342 245__ $$9eng$$aPhylogenetic signal in predator–prey body-size relationships
000028342 269__ $$c2011
000028342 520__ $$9eng$$aBody mass is a fundamental characteristic that affects metabolism, life history, and population abundance and frequently sets bounds on who eats whom in food webs. Based on a collection of topological food webs, Ulrich Brose and colleagues presented a general relationship between the body mass of predators and their prey and analyzed how mean predator–prey body-mass ratios differed among habitats and predator metabolic categories. Here we show that the general body-mass relationship conceals significant variation associated with both predator and prey phylogeny. Major-axis regressions between the log body mass of predators and prey differed among taxonomic groups. The global pattern for Kingdom Animalia had slope > 1, but phyla and classes varied, and several had slopes significantly <1. The predator–prey body-mass ratio can therefore decrease or increase with increasing body mass, depending on the taxon considered. We also found a significant phylogenetic signal in analyses of prey body-mass range for predators and predator body-mass range for prey, with stronger signal in the former. Besides providing insights into how characteristics of trophic interactions evolve, our results emphasize the need to integrate phylogeny to improve models of community structure and dynamics or to achieve a metabolic theory of food-web ecology.
000028342 695__ $$9eng$$aallometry ; body mass ; body-size ratio ; food webs ; Grafen's ρ ; metabolic theory of food-web ecology ; Pagel's λ ; predation ; trophic interactions
000028342 700__ $$aKehrli, Patrik$$uUnit of Ecology and Evolution, Department of Biology, University of Fribourg, Switzerland -  Station de Recherche Agroscope Changins-Wädenswil, Nyon, Switzerland.
000028342 700__ $$aRohr, Rudolf Philippe$$uUnit of Ecology and Evolution, Department of Biology, University of Fribourg, Switzerland - Integrative Ecology Group, Estación Biológica de Doñana-CSIC, Américo Vespucio, Sevilla, Spain
000028342 700__ $$aBersier, Louis-Félix$$uUnit of Ecology and Evolution, Department of Biology, University of Fribourg, Switzerland
000028342 773__ $$g2011/92/12/2183–2189$$tEcology
000028342 775__ $$gPublished version$$ohttp://dx.doi.org/10.1890/10-2234.1
000028342 8564_ $$fber_psp.pdf$$qapplication/pdf$$s155915$$uhttp://doc.rero.ch/record/28342/files/ber_psp.pdf$$yorder:1$$zpdf
000028342 918__ $$aFaculté des sciences$$bDécanat, Ch. du Musée 6A, 1700 Fribourg$$cBiologie
000028342 919__ $$aUniversité de Fribourg$$bFribourg$$ddoc.support@rero.ch
000028342 980__ $$aPOSTPRINT$$bUNIFR$$fART_JOURNAL
000028342 990__ $$a20120125083347-OF