The animal species–body size distribution of Marion Island
Body size is one of the most significant features of animals. Not only is it correlated with many life history and ecological traits, but it also may influence the abundance of species within, and their membership of, assemblages. Understanding of the latter processes is frequently based on a compar...
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ftpubmed:oai:pubmedcentral.nih.gov:64709 2023-05-15T13:45:46+02:00 The animal species–body size distribution of Marion Island Gaston, Kevin J. Chown, Steven L. Mercer, Richard D. 2001-12-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC64709 http://www.ncbi.nlm.nih.gov/pubmed/11724928 https://doi.org/10.1073/pnas.251332098 en eng The National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC64709 http://www.ncbi.nlm.nih.gov/pubmed/11724928 http://dx.doi.org/10.1073/pnas.251332098 Copyright © 2001, The National Academy of Sciences Biological Sciences Text 2001 ftpubmed https://doi.org/10.1073/pnas.251332098 2013-08-29T08:46:18Z Body size is one of the most significant features of animals. Not only is it correlated with many life history and ecological traits, but it also may influence the abundance of species within, and their membership of, assemblages. Understanding of the latter processes is frequently based on a comparison of model outcomes with the frequency of species of different body mass within natural assemblages. Consequently, the form of these frequency distributions has been much debated. Empirical data usually concern taxonomically delineated groups, such as classes or orders, whereas the processes ultimately apply to whole assemblages. Here, we report the most complete animal species–body size distribution to date for those free-living species breeding on sub-Antarctic Marion Island and using the terrestrial environment. Extending over 15 orders of magnitude of variation in body mass, this distribution is bimodal, with separate peaks for invertebrates and vertebrates. Under logarithmic transformation, the distribution for vertebrates is not significantly skewed, whereas that for invertebrates is right-skewed. Contrary to expectation based on a fractal or pseudofractal environmental structure, the decline in the richness of species at the smallest body sizes is a real effect and not a consequence of unrecorded species or of species introductions to the island. The scarcity of small species might well be a consequence of their large geographic ranges. Text Antarc* Antarctic Marion Island PubMed Central (PMC) Antarctic Proceedings of the National Academy of Sciences 98 25 14493 14496 |
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Biological Sciences Gaston, Kevin J. Chown, Steven L. Mercer, Richard D. The animal species–body size distribution of Marion Island |
topic_facet |
Biological Sciences |
description |
Body size is one of the most significant features of animals. Not only is it correlated with many life history and ecological traits, but it also may influence the abundance of species within, and their membership of, assemblages. Understanding of the latter processes is frequently based on a comparison of model outcomes with the frequency of species of different body mass within natural assemblages. Consequently, the form of these frequency distributions has been much debated. Empirical data usually concern taxonomically delineated groups, such as classes or orders, whereas the processes ultimately apply to whole assemblages. Here, we report the most complete animal species–body size distribution to date for those free-living species breeding on sub-Antarctic Marion Island and using the terrestrial environment. Extending over 15 orders of magnitude of variation in body mass, this distribution is bimodal, with separate peaks for invertebrates and vertebrates. Under logarithmic transformation, the distribution for vertebrates is not significantly skewed, whereas that for invertebrates is right-skewed. Contrary to expectation based on a fractal or pseudofractal environmental structure, the decline in the richness of species at the smallest body sizes is a real effect and not a consequence of unrecorded species or of species introductions to the island. The scarcity of small species might well be a consequence of their large geographic ranges. |
format |
Text |
author |
Gaston, Kevin J. Chown, Steven L. Mercer, Richard D. |
author_facet |
Gaston, Kevin J. Chown, Steven L. Mercer, Richard D. |
author_sort |
Gaston, Kevin J. |
title |
The animal species–body size distribution of Marion Island |
title_short |
The animal species–body size distribution of Marion Island |
title_full |
The animal species–body size distribution of Marion Island |
title_fullStr |
The animal species–body size distribution of Marion Island |
title_full_unstemmed |
The animal species–body size distribution of Marion Island |
title_sort |
animal species–body size distribution of marion island |
publisher |
The National Academy of Sciences |
publishDate |
2001 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC64709 http://www.ncbi.nlm.nih.gov/pubmed/11724928 https://doi.org/10.1073/pnas.251332098 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Marion Island |
genre_facet |
Antarc* Antarctic Marion Island |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC64709 http://www.ncbi.nlm.nih.gov/pubmed/11724928 http://dx.doi.org/10.1073/pnas.251332098 |
op_rights |
Copyright © 2001, The National Academy of Sciences |
op_doi |
https://doi.org/10.1073/pnas.251332098 |
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Proceedings of the National Academy of Sciences |
container_volume |
98 |
container_issue |
25 |
container_start_page |
14493 |
op_container_end_page |
14496 |
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1766230585072680960 |