Evolution and biodiversity of Antarctic organisms: a molecular perspective
The Antarctic biota is highly endemic, and the diversity and abundance of taxonomic groups differ from elsewhere in the world. Such characteristics have resulted from evolution in isolation in an increasingly extreme environment over the last 100 Myr. Studies on Antarctic species represent some of t...
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ftpubmed:oai:pubmedcentral.nih.gov:2443175 2023-05-15T13:45:16+02:00 Evolution and biodiversity of Antarctic organisms: a molecular perspective Rogers, Alex David 2007-05-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2443175 http://www.ncbi.nlm.nih.gov/pubmed/17553774 https://doi.org/10.1098/rstb.2006.1948 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2443175 http://www.ncbi.nlm.nih.gov/pubmed/17553774 http://dx.doi.org/10.1098/rstb.2006.1948 © 2007 The Royal Society Research Article Text 2007 ftpubmed https://doi.org/10.1098/rstb.2006.1948 2013-09-02T01:06:52Z The Antarctic biota is highly endemic, and the diversity and abundance of taxonomic groups differ from elsewhere in the world. Such characteristics have resulted from evolution in isolation in an increasingly extreme environment over the last 100 Myr. Studies on Antarctic species represent some of the best examples of natural selection at the molecular, structural and physiological levels. Analyses of molecular genetics data are consistent with the diversity and distribution of marine and terrestrial taxa having been strongly influenced by geological and climatic cooling events over the last 70 Myr. Such events have resulted in vicariance driven by continental drift and thermal isolation of the Antarctic, and in pulses of species range contraction into refugia and subsequent expansion and secondary contact of genetically distinct populations or sister species during cycles of glaciation. Limited habitat availability has played a major role in structuring populations of species both in the past and in the present day. For these reasons, despite the apparent simplicity or homogeneity of Antarctic terrestrial and marine environments, populations of species are often geographically structured into genetically distinct lineages. In some cases, genetic studies have revealed that species defined by morphological characters are complexes of cryptic or sibling species. Climate change will cause changes in the distribution of many Antarctic and sub-Antarctic species through affecting population-level processes such as life history and dispersal. Text Antarc* Antarctic PubMed Central (PMC) Antarctic The Antarctic Philosophical Transactions of the Royal Society B: Biological Sciences 362 1488 2191 2214 |
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Research Article Rogers, Alex David Evolution and biodiversity of Antarctic organisms: a molecular perspective |
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The Antarctic biota is highly endemic, and the diversity and abundance of taxonomic groups differ from elsewhere in the world. Such characteristics have resulted from evolution in isolation in an increasingly extreme environment over the last 100 Myr. Studies on Antarctic species represent some of the best examples of natural selection at the molecular, structural and physiological levels. Analyses of molecular genetics data are consistent with the diversity and distribution of marine and terrestrial taxa having been strongly influenced by geological and climatic cooling events over the last 70 Myr. Such events have resulted in vicariance driven by continental drift and thermal isolation of the Antarctic, and in pulses of species range contraction into refugia and subsequent expansion and secondary contact of genetically distinct populations or sister species during cycles of glaciation. Limited habitat availability has played a major role in structuring populations of species both in the past and in the present day. For these reasons, despite the apparent simplicity or homogeneity of Antarctic terrestrial and marine environments, populations of species are often geographically structured into genetically distinct lineages. In some cases, genetic studies have revealed that species defined by morphological characters are complexes of cryptic or sibling species. Climate change will cause changes in the distribution of many Antarctic and sub-Antarctic species through affecting population-level processes such as life history and dispersal. |
format |
Text |
author |
Rogers, Alex David |
author_facet |
Rogers, Alex David |
author_sort |
Rogers, Alex David |
title |
Evolution and biodiversity of Antarctic organisms: a molecular perspective |
title_short |
Evolution and biodiversity of Antarctic organisms: a molecular perspective |
title_full |
Evolution and biodiversity of Antarctic organisms: a molecular perspective |
title_fullStr |
Evolution and biodiversity of Antarctic organisms: a molecular perspective |
title_full_unstemmed |
Evolution and biodiversity of Antarctic organisms: a molecular perspective |
title_sort |
evolution and biodiversity of antarctic organisms: a molecular perspective |
publisher |
The Royal Society |
publishDate |
2007 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2443175 http://www.ncbi.nlm.nih.gov/pubmed/17553774 https://doi.org/10.1098/rstb.2006.1948 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2443175 http://www.ncbi.nlm.nih.gov/pubmed/17553774 http://dx.doi.org/10.1098/rstb.2006.1948 |
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© 2007 The Royal Society |
op_doi |
https://doi.org/10.1098/rstb.2006.1948 |
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Philosophical Transactions of the Royal Society B: Biological Sciences |
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362 |
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1488 |
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2191 |
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2214 |
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1766217949550477312 |