Why so many apparently rare beetles in Chilean temperate rainforests?

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 fo...

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Autores principales:	RICHARDSON,BARRY J, ARIAS-BOHART,ELIZABETH T
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2011
Materias:	species abundance curves biodiversity estimation body size and density
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300009
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spelling	oai:scielo:S0716-078X20110003000092011-12-26Why so many apparently rare beetles in Chilean temperate rainforests?RICHARDSON,BARRY JARIAS-BOHART,ELIZABETH T species abundance curves biodiversity estimation body size and density 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 from different feeding guilds with different species abundance curves are likely to be sufficient to explain the divergence of data for large speciose beetle communities from the predictions of any of the equilibrium models. Until these three factors can be fully accounted for and residual divergence detected, there is no necessity to propose further, more complex, mechanisms to explain such data sets. Estimated values of alpha and Simpson D were shown to be strongly sample size dependent, affecting their value as estimators of biological diversity.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.84 n.3 20112011-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300009en10.4067/S0716-078X2011000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	species abundance curves biodiversity estimation body size and density
spellingShingle	species abundance curves biodiversity estimation body size and density RICHARDSON,BARRY J ARIAS-BOHART,ELIZABETH T Why so many apparently rare beetles in Chilean temperate rainforests?
description	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 from different feeding guilds with different species abundance curves are likely to be sufficient to explain the divergence of data for large speciose beetle communities from the predictions of any of the equilibrium models. Until these three factors can be fully accounted for and residual divergence detected, there is no necessity to propose further, more complex, mechanisms to explain such data sets. Estimated values of alpha and Simpson D were shown to be strongly sample size dependent, affecting their value as estimators of biological diversity.
author	RICHARDSON,BARRY J ARIAS-BOHART,ELIZABETH T
author_facet	RICHARDSON,BARRY J ARIAS-BOHART,ELIZABETH T
author_sort	RICHARDSON,BARRY J
title	Why so many apparently rare beetles in Chilean temperate rainforests?
title_short	Why so many apparently rare beetles in Chilean temperate rainforests?
title_full	Why so many apparently rare beetles in Chilean temperate rainforests?
title_fullStr	Why so many apparently rare beetles in Chilean temperate rainforests?
title_full_unstemmed	Why so many apparently rare beetles in Chilean temperate rainforests?
title_sort	why so many apparently rare beetles in chilean temperate rainforests?
publisher	Sociedad de Biología de Chile
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300009
work_keys_str_mv	AT richardsonbarryj whysomanyapparentlyrarebeetlesinchileantemperaterainforests AT ariasbohartelizabetht whysomanyapparentlyrarebeetlesinchileantemperaterainforests
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Why so many apparently rare beetles in Chilean temperate rainforests?

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