Density-Dependent Effects of Predator Species-Richness in Diversity–Function Studies

Show simple item record Griffiths, Georgianne en Wilby, A en Crawley, MJ en Thomas, MB en 2015-05-13T02:50:34Z en 2008-11 en
dc.identifier.citation Ecology, 2008, 89 (11), pp. 2986 - 2993 en
dc.identifier.issn 0012-9658 en
dc.identifier.uri en
dc.description.abstract Ecological systems often exhibit a positive but saturating diversity–function curve. Variation in the mechanisms generating this relationship can alter the slope and variance of the curve, with implications for the optimal management of biodiversity for ecosystem services. In biological control, prevalence of selection effects supports augmentation of the most effective natural enemy, but complementarity effects support augmentation of natural enemy diversity. Optimization of biological control strategies from the results of diversity–function studies is limited because few consider changes in function with relative or absolute changes in abundance, and many confound the relative importance of richness and density through experimental designs (additive and substitutive). By manipulating species richness across an abundance gradient we show that effects of species richness are density dependent and indicate how this may be incorporated into experimental designs or models predicting resource consumption in diverse communities. Furthermore, the underlying mechanisms causing an observed diversity–function response, and its associated variation, changed across the richness–abundance gradient. Finally, species-rich assemblages provided higher levels of minimum function than species-poor assemblages, without any compromise on the maximum function possible. en
dc.relation.ispartofseries Ecology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.title Density-Dependent Effects of Predator Species-Richness in Diversity–Function Studies en
dc.type Journal Article en
dc.identifier.doi 10.1890/08-0685.1 en
pubs.issue 11 en
pubs.begin-page 2986 en
pubs.volume 89 en
dc.description.version VoR - Version of Record en
pubs.end-page 2993 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 470607 en
pubs.record-created-at-source-date 2015-05-13 en

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