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Associations between species and groups of sites : indices and statistical inference / Miquel De Caceres in Ecology, vol. 90, n°12 (Année 2009)  

Public [article]  inEcology > vol. 90, n°12 (Année 2009) . - pp. 3566-3574 Titre : Associations between species and groups of sites : indices and statistical inference Type de document : texte imprimé Auteurs : Miquel De Caceres, Auteur ; Pierre Legendre, Auteur Année de publication : 2009 Article en page(s) : pp. 3566-3574 Langues : Anglais (eng) Mots-clés : community types  fidelity measure  indicator value  phi coefficient of association Résumé : "Ecologists often face the task of studying the association between single speciesand one or several groups of sites representing habitat types, community types, or othercategories. Besides characterizing the ecological preference of the species, the strength of theassociation usually presents a lot of interest for conservation biology, landscape mapping andmanagement, and natural reserve design, among other applications. The indices mostfrequently employed to assess these relationships are the phi coefficient of association and theindicator value index (IndVal). We compare these two approaches by putting them into abroader framework of related measures, which includes several new indices. We presentpermutation tests to assess the statistical significance of species–site group associations andbootstrap methods for obtaining confidence intervals. Correlation measures, such as the phicoefficient, are more context-dependent than indicator values but allow focusing on thepreference of the species. In contrast, the two components of an indicator value index directlyassess the value of the species as a bioindicator because they can be interpreted as its positivepredictive value and sensitivity. Ecologists should select the most appropriate index ofassociation strength according to their objective and then compute confidence intervals todetermine the precision of the estimate." Type de publication : périodique Référence biblio : De Caceres M., Legendre P., 2009 - Associations between species and groups of sites : indices and statistical inference. Ecology, 90 (12) : 3566-3574. En ligne : http://adn.biol.umontreal.ca/~numericalecology/Reprints/De_Caceres_&_Legendre_Ec [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66166 [article]

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