Food-web interaction strength distributions are conserved by greater variation between than within predator-prey pairs

Daniel L PrestonMark Novak


Species interactions in food webs are usually recognized as dynamic, varying across species, space, and time because of biotic and abiotic drivers. Yet food webs also show emergent properties that appear consistent, such as a skewed frequency distribution of interaction strengths (many weak, few strong). Reconciling these two properties requires an understanding of the variation in pairwise interaction strengths and its underlying mechanisms. We estimated stream sculpin feeding rates in three seasons at nine sites in Oregon to examine variation in trophic interaction strengths both across and within predator-prey pairs. Predator and prey densities, prey body mass, and abiotic factors were considered as putative drivers of within-pair variation over space and time. We hypothesized that consistently skewed interaction strength distributions could result if individual interaction strengths show relatively little variation, or alternatively, if interaction strengths vary but shift in ways that conserve their overall frequency distribution. Feeding rate distributions remained consistently and positively skewed across all sites and seasons. The mean coefficient of variation in feeding rates within each of 25 focal species pairs acros...Continue Reading


Oct 8, 1999·Trends in Ecology & Evolution·M L McKinney, J L Lockwood
Apr 13, 2000·Annual Review of Entomology·A D Huryn, J B Wallace
Jul 8, 2000·Trends in Ecology & Evolution·P A Abrams, L R Ginzburg
Sep 2, 2000·Journal of Experimental Marine Biology and Ecology·B A Menge
Nov 2, 2005·Proceedings of the National Academy of Sciences of the United States of America·Brian J McGillBrian A Maurer
May 11, 2007·Ecology·David A Spiller, Thomas W Schoener
Feb 19, 2008·Journal of Forensic Sciences·John R WallaceMollie McIntosh
Dec 9, 2008·Ecology Letters·Jason M TylianakisDavid A Wardle
Dec 1, 1994·Trends in Ecology & Evolution·T M Blackburn, K J Gaston
Jul 8, 2011·Nature·Jonathan B Armstrong, Daniel E Schindler
Jul 20, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·John J Wiens
Jun 13, 2012·Biological Reviews of the Cambridge Philosophical Society·Mary Susanne WiszJens-Christian Svenning
Jun 14, 2012·Ecology·Diego P VázquezNydia L Vitale
Sep 26, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Björn C RallOwen L Petchey
Jul 4, 2013·Ecology Letters·Gregor KalinkatUlrich Brose
Sep 10, 2014·Ecology Letters·E M WolkovichT J Davies
Apr 14, 2016·Nature Communications·Gabriel Gellner, Kevin S McCann
Feb 2, 2017·Ecology·Jonathan D TonkinDavid A Lytle
Apr 21, 2017·Oecologia·Christopher WolfAlix I Gitelman
May 10, 2017·Ecology Letters·Mark NovakIsaac D Shepard
Dec 21, 2017·Journal of Cell Communication and Signaling·F A ValentijnRoel Goldschmeding
Jul 6, 2018·Nature Communications·Bernat Bramon MoraDaniel B Stouffer
Jul 18, 2018·Nature Ecology & Evolution·Duncan N L MengeAmelia A Wolf
Sep 12, 2018·The American Naturalist·Raul Costa-PereiraVolker H W Rudolf
Jan 22, 2019·Amyloid : the International Journal of Experimental and Clinical Investigation : the Official Journal of the International Society of Amyloidosis·Lucas L FalkeSusan J J Logtenberg

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Dec 29, 2020·The Journal of Animal Ecology·Daniel L PrestonMark Novak

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