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Auteur Miquel De Caceres |
Documents disponibles écrits par cet auteur
Affiner la rechercheAssessing species diagnostic value in large data sets : A comparison between phi-coefficient and Ochiai index / Miquel De Caceres in Journal of Vegetation Science, vol. 19, n°6 (Année 2008)
Titre : Assessing species diagnostic value in large data sets : A comparison between phi-coefficient and Ochiai index Type de document : Livre Auteurs : Miquel De Caceres, Auteur ; Xavier Font, Auteur ; Fernando Oliva, Auteur Année de publication : 2008 Article en page(s) : pp. 779-788 Langues : Anglais Résumé : "The diagnostic value of species in a given region is best assessed using the Ochiai index, since it can be split into two interpretable asymmetrical components. We recommend the determination of context‐dependent differential species using the φ‐coefficient, and the assessment of species regional diagnostic value by means of a stratification procedure in combination with the Ochiai index." Type de publication : périodique Référence biblio : De Caceres M., Font X., Oliva F., 2008 - Assessing species diagnostic value in large data sets : A comparison between phi-coefficient and Ochiai index. Journal of Vegetation Science, 19 (6) : 779-788. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66164
in Journal of Vegetation Science > vol. 19, n°6 (Année 2008) . - pp. 779-788[article]Exemplaires
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Titre : Associations between species and groups of sites : indices and statistical inference Type de document : Livre Auteurs : Miquel De Caceres, Auteur ; Pierre Legendre, Auteur Année de publication : 2009 Article en page(s) : pp. 3566-3574 Langues : Anglais 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
in Ecology > vol. 90, n°12 (Année 2009) . - pp. 3566-3574[article]Exemplaires
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Titre : The Global Index of Vegetation-Plot Databases (GIVD) : a new resource for vegetation science Type de document : Livre Auteurs : Jürgen Dengler, Auteur ; Robert K. Peet, Auteur ; Miquel De Caceres, Auteur ; Milan Chytrý, Auteur ; Jörg Ewald, Auteur ; Jens Oldeland, Auteur ; Gabriela López González, Auteur ; Manfred Finckh, Auteur ; Ladislav Mucina, Auteur ; John Rodwell, Auteur ; Joop H. J. Schaminée, Auteur ; Nick Spencer, Auteur Année de publication : 2011 Article en page(s) : pp. 582-597 Langues : Anglais Résumé : "The vegetation plot data in GIVD constitute a major resource for biodiversity research, both through the large number of species occurrence records and storage of species co‐occurrence information at a small scale, combined with structural and plot‐based environmental data. We identify shortcomings in available data that need to be addressed through sampling under‐represented geographic regions, providing better incentives for data collection and sharing, developing user‐friendly database exchange standards, as well as tools to analyse and remove confounding effects of sampling biases. The increased availability of data sets conferred by registration in GIVD offers significant opportunities for large‐scale studies in community ecology, macroecology and global change research." Type de publication : périodique Référence biblio : Dengler J., Peet R., De Caceres M., Chytrý M., Ewald J., Oldeland J., López González G., Finckh M., Mucina L., Rodwell J., Schaminée J.-J., Spencer N., 2011 - The Global Index of Vegetation-Plot Databases (GIVD) : a new resource for vegetation science. Journal of Vegetation Science, 22 (4) : 582-597. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66162
in Journal of Vegetation Science > vol. 22, n°4 (Année 2011) . - pp. 582-597[article]Exemplaires
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