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	Provedor de dados ArchiMer (1) Autor Beaugrand, G (1) Edwards, M (1) Palavra-chave Continuous Plankton Recorder survey (1) Copepods (1) Copépodes (1) Diversity indices (1) Indices de diversité (1) Programme continuous plankton recorder (1) Sample size (1) Sensibilité (1) Sensitivity (1) Taille de l’échantillonnage (1) Mais... Tipo do documento Text (1) Ano 2001 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Differences in performance among four indices used to evaluate diversity in planktonic ecosystems ArchiMer Beaugrand, G; Edwards, M. The performance of four common estimators of diversity are investigated using calanoid copepod data from the Continuous Plankton Recorder (CPR) survey. The region of the North Atlantic and the North Sea was divided into squares of 400 nautical miles for each 2-month period. For each 144 possible cases, Pielou's pooled quadrat method was performed with the aims of determining asymptotic diversity and investigating the CPR sample-size dependence of diversity estimators. It is shown that the performance of diversity indices may greatly vary in space and time (at a seasonal scale). This dependence is more pronounced in higher diverse environments and when the sample size is small. Despite results showing that all estimators underestimate the 'actual'... Tipo: Text Palavras-chave: Programme continuous plankton recorder; Copépodes; Indices de diversité; Taille de l’échantillonnage; Sensibilité; Continuous Plankton Recorder survey; Copepods; Diversity indices; Sample size; Sensitivity. Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43343/42884.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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