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MagurranRSPB2012SelectionStructures1379.pdf684.03 kBAdobe PDFView/Open
Title: How selection structures species abundance distributions
Authors: Magurran, Anne E.
Henderson, Peter A.
Keywords: Biodiversity
Estuarine fish
Body size
QL Zoology
Issue Date: 22-Sep-2012
Citation: Magurran , A E & Henderson , P A 2012 , ' How selection structures species abundance distributions ' Proceedings of the Royal Society B: Biological Sciences , vol 279 , no. 1743 , pp. 3722-3726 . , 10.1098/rspb.2012.1379
Abstract: How do species divide resources to produce the characteristic species abundance distributions seen in nature? One way to resolve this problem is to examine how the biomass (or capacity) of the spatial guilds that combine to produce an abundance distribution is allocated among species. Here we argue that selection on body size varies across guilds occupying spatially distinct habitats. Using an exceptionally well-characterized estuarine fish community, we show that biomass is concentrated in large bodied species in guilds where habitat structure provides protection from predators, but not in those guilds associated with open habitats and where safety in numbers is a mechanism for reducing predation risk. We further demonstrate that while there is temporal turnover in the abundances and identities of species that comprise these guilds, guild rank order is conserved across our 30-year time series. These results demonstrate that ecological communities are not randomly assembled but can be decomposed into guilds where capacity is predictably allocated among species.
Version: Publisher PDF
Status: Peer reviewed
ISSN: 0962-8452
Type: Journal article
Rights: This journal is © 2012 The Royal Society. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Appears in Collections:University of St Andrews Research
Biology Research
Centre for Research into Ecological & Environmental Modelling (CREEM) Research
Institute of Behavioural and Neural Sciences Research
St Andrews Sustainablity Institute Research
Scottish Oceans Institute Research

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