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Local and regional rarity in a diverse tropical fish assemblage
Because most species in an ecological assemblage are rare, much of the species richness we value is due to taxa with few individuals or a restricted distribution. It has been apparent since the time of ecological pioneers such as Bates and Darwin that tropical systems have disproportionately large n...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574402/ https://www.ncbi.nlm.nih.gov/pubmed/23193122 http://dx.doi.org/10.1098/rspb.2012.2076 |
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author | Hercos, A. P. Sobansky, M. Queiroz, H. L. Magurran, A. E. |
author_facet | Hercos, A. P. Sobansky, M. Queiroz, H. L. Magurran, A. E. |
author_sort | Hercos, A. P. |
collection | PubMed |
description | Because most species in an ecological assemblage are rare, much of the species richness we value is due to taxa with few individuals or a restricted distribution. It has been apparent since the time of ecological pioneers such as Bates and Darwin that tropical systems have disproportionately large numbers of rare species, yet the distribution and abundance patterns of these species remain largely unknown. Here, we examine the diversity of freshwater fish in a series of lakes in the Amazonian várzea, and relate relative abundance, both as numbers of individuals and as biomass, to the occurrence of species in space and time. We find a bimodal relationship of occurrence that distinguishes temporally and spatially persistent species from those that are infrequent in both space and time. Logistic regression reveals that information on occurrence helps distinguish those species that are rare in this locality but abundant elsewhere, from those that are rare throughout the region. These results form a link between different approaches used to evaluate commonness and rarity. In doing so, they provide a tool for identifying species of high conservation priority in poorly documented but species rich localities. |
format | Online Article Text |
id | pubmed-3574402 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-35744022013-03-01 Local and regional rarity in a diverse tropical fish assemblage Hercos, A. P. Sobansky, M. Queiroz, H. L. Magurran, A. E. Proc Biol Sci Research Articles Because most species in an ecological assemblage are rare, much of the species richness we value is due to taxa with few individuals or a restricted distribution. It has been apparent since the time of ecological pioneers such as Bates and Darwin that tropical systems have disproportionately large numbers of rare species, yet the distribution and abundance patterns of these species remain largely unknown. Here, we examine the diversity of freshwater fish in a series of lakes in the Amazonian várzea, and relate relative abundance, both as numbers of individuals and as biomass, to the occurrence of species in space and time. We find a bimodal relationship of occurrence that distinguishes temporally and spatially persistent species from those that are infrequent in both space and time. Logistic regression reveals that information on occurrence helps distinguish those species that are rare in this locality but abundant elsewhere, from those that are rare throughout the region. These results form a link between different approaches used to evaluate commonness and rarity. In doing so, they provide a tool for identifying species of high conservation priority in poorly documented but species rich localities. The Royal Society 2013-01-22 /pmc/articles/PMC3574402/ /pubmed/23193122 http://dx.doi.org/10.1098/rspb.2012.2076 Text en http://creativecommons.org/licenses/by/3.0/ © 2012 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Research Articles Hercos, A. P. Sobansky, M. Queiroz, H. L. Magurran, A. E. Local and regional rarity in a diverse tropical fish assemblage |
title | Local and regional rarity in a diverse tropical fish assemblage |
title_full | Local and regional rarity in a diverse tropical fish assemblage |
title_fullStr | Local and regional rarity in a diverse tropical fish assemblage |
title_full_unstemmed | Local and regional rarity in a diverse tropical fish assemblage |
title_short | Local and regional rarity in a diverse tropical fish assemblage |
title_sort | local and regional rarity in a diverse tropical fish assemblage |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574402/ https://www.ncbi.nlm.nih.gov/pubmed/23193122 http://dx.doi.org/10.1098/rspb.2012.2076 |
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