Evolutionary origins of Antarctic microbiota: invasion, selection and endemism
Abstract: Increasing interest in the ecological roles, conservation and biotechnological potential of Antarctic microbiota has focused attention on their biodiversity and evolutionary origins. Antarctic microbial ecosystems provide useful models for general questions in evolutionary ecology given th...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.540.5470 2023-05-15T13:44:46+02:00 Evolutionary origins of Antarctic microbiota: invasion, selection and endemism Warwick F. Vincent The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.5470 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.5470 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf Key words algae bacteria biogeography cyanobacteria dispersal fungi polar protozoa text 2000 ftciteseerx 2016-01-08T11:02:57Z Abstract: Increasing interest in the ecological roles, conservation and biotechnological potential of Antarctic microbiota has focused attention on their biodiversity and evolutionary origins. Antarctic microbial ecosystems provide useful models for general questions in evolutionary ecology given the relative isolation of the South Polar Regon, the severe biological constraints imposed by the polar environment, and the absence of hgher plants and animals in some Antarctic habitats. Sealed environments such as Lake Vostok and the overlying East Antarctic ice sheet provide unique, natural culture collections for studying microorganisms that have been isolated from the global gene pool over timescales of evolutionary significance. Most Antarctic environments, however, continue to receive microbial propagules from outside the regon, as indicated by spore trap data, the microflora found in Antarctic snow and ice, the colonising taxa at geothermal sites, and the high frequency of apparently cosmopolitan species in most habitats. Differences in environmental stability and selection pressure among environments are likely to influence the degree of adaptive rahation and microbial endemism. The latter seems greater in the Southern Ocean by comparison with non-marine ecosystems of Antarctica, although there is some evidence of endemic species in highly specialised niches on the continent such as in the endolithic habitat and saline lakes. Analytical techniques such as 16s rDNA sequencing and DNA-DNA hybridisation are beginning to provide new insights into the genetic affinities and biodwersity of Antarctic microbiota, and are leading to a more rigorous evaluation of microbial endemism. Text Antarc* Antarctic Antarctica Ice Sheet Southern Ocean Unknown Antarctic East Antarctic Ice Sheet Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) Southern Ocean |
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Key words algae bacteria biogeography cyanobacteria dispersal fungi polar protozoa |
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Key words algae bacteria biogeography cyanobacteria dispersal fungi polar protozoa Warwick F. Vincent Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
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Key words algae bacteria biogeography cyanobacteria dispersal fungi polar protozoa |
description |
Abstract: Increasing interest in the ecological roles, conservation and biotechnological potential of Antarctic microbiota has focused attention on their biodiversity and evolutionary origins. Antarctic microbial ecosystems provide useful models for general questions in evolutionary ecology given the relative isolation of the South Polar Regon, the severe biological constraints imposed by the polar environment, and the absence of hgher plants and animals in some Antarctic habitats. Sealed environments such as Lake Vostok and the overlying East Antarctic ice sheet provide unique, natural culture collections for studying microorganisms that have been isolated from the global gene pool over timescales of evolutionary significance. Most Antarctic environments, however, continue to receive microbial propagules from outside the regon, as indicated by spore trap data, the microflora found in Antarctic snow and ice, the colonising taxa at geothermal sites, and the high frequency of apparently cosmopolitan species in most habitats. Differences in environmental stability and selection pressure among environments are likely to influence the degree of adaptive rahation and microbial endemism. The latter seems greater in the Southern Ocean by comparison with non-marine ecosystems of Antarctica, although there is some evidence of endemic species in highly specialised niches on the continent such as in the endolithic habitat and saline lakes. Analytical techniques such as 16s rDNA sequencing and DNA-DNA hybridisation are beginning to provide new insights into the genetic affinities and biodwersity of Antarctic microbiota, and are leading to a more rigorous evaluation of microbial endemism. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Warwick F. Vincent |
author_facet |
Warwick F. Vincent |
author_sort |
Warwick F. Vincent |
title |
Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
title_short |
Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
title_full |
Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
title_fullStr |
Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
title_full_unstemmed |
Evolutionary origins of Antarctic microbiota: invasion, selection and endemism |
title_sort |
evolutionary origins of antarctic microbiota: invasion, selection and endemism |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.5470 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf |
long_lat |
ENVELOPE(106.000,106.000,-77.500,-77.500) |
geographic |
Antarctic East Antarctic Ice Sheet Lake Vostok Southern Ocean |
geographic_facet |
Antarctic East Antarctic Ice Sheet Lake Vostok Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
op_source |
http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.5470 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/142.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766206131483443200 |