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	Provedor de dados RChHN (2) Autor ARIAS-BOHART,ELIZABETH T (2) RICHARDSON,BARRY J (2) Palavra-chave Araucaria (1) Beetle communities (1) Biodiversity estimation (1) Body size and density (1) Effective community size (1) Estimating parameter J (1) Nothofagus (1) Species abundance curves (1) Mais... Tipo do documento Journal article (2) Ano 2011 (2) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Why so many apparently rare beetles in Chilean temperate rainforests? RChHN RICHARDSON,BARRY J; ARIAS-BOHART,ELIZABETH T. Species abundance curves were calculated from data sets collected by fogging 52 trees in Nothofagus forest (~46000 specimens) and 24 trees in Araucaria forest (~15000 specimens) in Chile. Neither data set fitted the standard species abundance models. Like similar data sets collected from tropical forests, there were too many species represented by single specimens. The proposal that these were vagrants normally found on other tree species was not supported as, unlike tropical forests, Nothofagus forests are not diverse, often consisting of single species stands. Examination of three assumptions of the most parsimonious equilibrium models showed them to be false. Between them the observations of undersampling bias, community disequilibria and combining data... Tipo: Journal article Palavras-chave: Species abundance curves; Biodiversity estimation; Body size and density. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300009 From genetic neighbourhood to local community: Estimating a key parameter of the Unified Neutral Theory of Biodiversity RChHN RICHARDSON,BARRY J; ARIAS-BOHART,ELIZABETH T. Issues related to the size and nature of what is termed a ''local community'' in a continuous metacommunity under unified neutral theory are explored. Developments in the parallel field of neutral genetics theory allow the size of genetic neighbourhoods in the context of isolation by distance processes to be calculated. These suggest a way to estimate the geographical size of an equivalent form of local community in ecology. It is derived from the estimated spatial autocorrelation value at zero geographical distance and this is obtained using the distribution of the relative frequencies of species in field samples separated by varying geographical distance. A data set of 62000 beetles collected for other purposes, and consisting of beetle samples collected... Tipo: Journal article Palavras-chave: Araucaria; Beetle communities; Effective community size; Estimating parameter J; Nothofagus. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400003 Registros recuperados: 2 Primeira ... 1 ... Última

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