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dc.contributor.authorBuckland, Stephen Terrence
dc.contributor.authorStudeny, Angelika Caroline
dc.contributor.authorMagurran, Anne
dc.contributor.authorIllian, Janine Baerbel
dc.contributor.authorNewson, Stuart
dc.identifier.citationBuckland , S T , Studeny , A C , Magurran , A , Illian , J B & Newson , S 2011 , ' The geometric mean of relative abundance indices : a biodiversity measure with a difference ' Ecosphere , vol. 2 , no. 9 , 100 . DOI: 10.1890/ES11-00186.1en
dc.identifier.otherPURE: 13665977
dc.identifier.otherPURE UUID: 056e5f4d-e8c7-4e93-beaa-a77a7a745d91
dc.descriptionThis work is partly supported by the European Research Councilen
dc.description.abstractThe 2010 Biodiversity Target of the Convention on Biological Diversity (CBD), set in 2002, which stated that there should be ‘a significant reduction of the current rate of biodiversity loss' by 2010, highlighted the need for informative and tractable metrics that can be used to evaluate change in biological diversity. While the subsequent Aichi 2020 targets are more wide-ranging, they also seek to reduce the rate of biodiversity loss. The geometric mean of relative abundance indices, G, is increasingly being used to examine trends in biological diversity and to assess whether biodiversity targets are being met. Here, we explore the mathematical and statistical properties of G that make it useful for judging temporal change in biological diversity, and we discuss its advantages and limitations relative to other measures. We demonstrate that the index reflects trends in both abundance and evenness, and that it is not prone to bias when detectability of individuals varies by species. We note that it allows data from different surveys to be combined to generate a composite index. However, the index exhibits high variance and unstable behaviour when rarely-recorded species are included in the analyses. Read More:
dc.rightsCopyright (c) 2011 the authors, published under the terms of the Creative Commons Attribution License, which permits restricted use, distribution, and reproduction in any medium, provided the original author and sources are credited. Available from http://www.esajournals.orgen
dc.subjectBiodiversity measureen
dc.subjectGeometric meanen
dc.subjectRelative abundanceen
dc.subject2010 Biodiversity Targeten
dc.subject2020 Aichi Biodiversity Targetsen
dc.subjectQL Zoologyen
dc.subjectQA Mathematicsen
dc.titleThe geometric mean of relative abundance indices : a biodiversity measure with a differenceen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. Centre for Research into Ecological & Environmental Modellingen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.contributor.institutionUniversity of St Andrews. St Andrews Sustainability Instituteen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. Fish Behaviour and Biodiversity Research Groupen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Centre for Biological Diversityen
dc.description.statusPeer revieweden

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