Predator diversity and ecosystem functioning: density modifies the effect of resource partitioning

Ecology
John N GriffinStuart R Jenkins

Abstract

The link between biodiversity and ecosystem functioning is now well established, but the challenge remains to develop a mechanistic understanding of observed effects. Predator-prey interactions provide an opportunity to examine the role of resource partitioning, thought to be a principal mediator of biodiversity-function relationships. To date, interactions between multiple predators and their prey have typically been investigated in simplified agricultural systems with limited scope for resource partitioning. Thus there remains a dearth of studies examining the functional consequences of predator richness in diverse food webs. Here, we manipulated a species-rich intertidal food web, crossing predator diversity with total predator density, to simultaneously examine the independent and interactive effects of diversity and density on the efficiency of secondary resource capture. The effect of predator diversity was only detectable at high predator densities where competitive interactions between individual predators were magnified; the rate of resource capture within the species mixture more than doubled that of the best-performing single species. Direct observation of species-specific resource use in monoculture, as quantified b...Continue Reading

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Citations

Jan 5, 2011·Oecologia·Tadashi Takizawa, William E Snyder
Jun 15, 2013·The ISME Journal·Muhammad SaleemAntonis Chatzinotas
Aug 27, 2010·Biology Letters·John N Griffin, Brian R Silliman
Apr 11, 2013·PloS One·Simone Des RochesLuke J Harmon
Jun 14, 2012·Ecology·Margarita BrandtAngel I Chiriboga
Sep 11, 2012·Journal of Insect Science·Ben P WerlingClaudio Gratton
May 15, 2012·Comptes rendus biologies·Farrah SamraouiBoudjéma Samraoui
Dec 24, 2013·Ecology·John N GriffinBradley J Cardinale
Jul 15, 2009·Trends in Ecology & Evolution·Julia ReissGuy Woodward
Mar 19, 2013·Global Change Biology·Nessa E O'Connor, Ian Donohue
Nov 21, 2012·The Journal of Animal Ecology·Nessa E O'ConnorIan Donohue
Nov 2, 2014·Ecology and Evolution·Yoshito ChikaraishiNaohiko Ohkouchi
Mar 13, 2014·Molecular Ecology·Jonathan G Lundgren, Janet K Fergen
May 12, 2010·Ecology Letters·Tobin D NorthfieldWilliam E Snyder
Apr 1, 2016·Proceedings. Biological Sciences·Emma F CampDavid J Smith
May 28, 2016·Ecology and Evolution·Jan-Hendrik DudenhöfferAlexandra-Maria Klein
Nov 4, 2017·Ecology Letters·Pablo Augusto P AntiqueiraGustavo Quevedo Romero
May 18, 2018·Global Change Biology·Pablo Augusto P AntiqueiraGustavo Quevedo Romero
Jan 17, 2020·Pest Management Science·Mmabaledi BuxtonRyan J Wasserman
Jan 7, 2018·Oecologia·Robert E Clark, Michael S Singer
Nov 1, 2008·Ecology·Georgianne J K GriffithsMatthew B Thomas
Apr 14, 2017·Ecology and Evolution·Javier Sánchez-HernándezPer-Arne Amundsen
Jun 28, 2018·Oecologia·M M PalaciosM I McCormick
Apr 30, 2021·Marine Environmental Research·Gustavo M MartinsAna I Neto

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