Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils
1. The causes of variations in the composition of microalgal communities on frost-sorted soil polygons on Signy Island, maritime Antarctica, were investigated, based on analyses of physical and chemical conditions and microalgal communities from 65 polygons. 2. Interpolygon variations in all environ...
Published in: | The Journal of Ecology |
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1993
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Online Access: | http://nora.nerc.ac.uk/id/eprint/517695/ https://doi.org/10.2307/2261503 |
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ftnerc:oai:nora.nerc.ac.uk:517695 2023-05-15T13:49:34+02:00 Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils Davey, Martin C. Rothery, Peter 1993 http://nora.nerc.ac.uk/id/eprint/517695/ https://doi.org/10.2307/2261503 unknown Davey, Martin C.; Rothery, Peter. 1993 Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils. The Journal of Ecology, 81 (2). 335-343. https://doi.org/10.2307/2261503 <https://doi.org/10.2307/2261503> Publication - Article PeerReviewed 1993 ftnerc https://doi.org/10.2307/2261503 2023-02-04T19:45:17Z 1. The causes of variations in the composition of microalgal communities on frost-sorted soil polygons on Signy Island, maritime Antarctica, were investigated, based on analyses of physical and chemical conditions and microalgal communities from 65 polygons. 2. Interpolygon variations in all environmental factors measured were small and not much greater than the intrapolygon variations. Microalgal diversity was low. Only seven taxa occurred in sufficient numbers to be included in statistical analyses, two of which, Nostoc spp., were found on only one polygon. The filamentous cyanobacterium Phormidium autumnale occurred on all polygons and usually provided the largest component of the total biovolume. 3. Microalgal communities were qualitatively constant within polygons, but varied markedly between polygons. Principal components analysis indicated that each taxon varied independently of the others, and hence it was not possible to correlate community structure with any specific environmental factor. 4. Correlations between numbers of individual taxa and edaphic factors were low and accounted for a maximum of 18% of the observed interpolygon variation or 12% of the total variation. It is suggested that the observed differences in the microalgal communities were due to the vagaries of the colonization process and reflect the probability of successful colonization of these ecosystems by microalgae. Article in Journal/Newspaper Antarc* Antarctic Antarctica Signy Island Natural Environment Research Council: NERC Open Research Archive Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) The Journal of Ecology 81 2 335 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
description |
1. The causes of variations in the composition of microalgal communities on frost-sorted soil polygons on Signy Island, maritime Antarctica, were investigated, based on analyses of physical and chemical conditions and microalgal communities from 65 polygons. 2. Interpolygon variations in all environmental factors measured were small and not much greater than the intrapolygon variations. Microalgal diversity was low. Only seven taxa occurred in sufficient numbers to be included in statistical analyses, two of which, Nostoc spp., were found on only one polygon. The filamentous cyanobacterium Phormidium autumnale occurred on all polygons and usually provided the largest component of the total biovolume. 3. Microalgal communities were qualitatively constant within polygons, but varied markedly between polygons. Principal components analysis indicated that each taxon varied independently of the others, and hence it was not possible to correlate community structure with any specific environmental factor. 4. Correlations between numbers of individual taxa and edaphic factors were low and accounted for a maximum of 18% of the observed interpolygon variation or 12% of the total variation. It is suggested that the observed differences in the microalgal communities were due to the vagaries of the colonization process and reflect the probability of successful colonization of these ecosystems by microalgae. |
format |
Article in Journal/Newspaper |
author |
Davey, Martin C. Rothery, Peter |
spellingShingle |
Davey, Martin C. Rothery, Peter Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
author_facet |
Davey, Martin C. Rothery, Peter |
author_sort |
Davey, Martin C. |
title |
Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
title_short |
Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
title_full |
Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
title_fullStr |
Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
title_full_unstemmed |
Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils |
title_sort |
primary colonization by microalgae in relation to spatial variation in edaphic factors on antarctic fellfield soils |
publishDate |
1993 |
url |
http://nora.nerc.ac.uk/id/eprint/517695/ https://doi.org/10.2307/2261503 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) |
geographic |
Antarctic Signy Island |
geographic_facet |
Antarctic Signy Island |
genre |
Antarc* Antarctic Antarctica Signy Island |
genre_facet |
Antarc* Antarctic Antarctica Signy Island |
op_relation |
Davey, Martin C.; Rothery, Peter. 1993 Primary colonization by microalgae in relation to spatial variation in edaphic factors on Antarctic fellfield soils. The Journal of Ecology, 81 (2). 335-343. https://doi.org/10.2307/2261503 <https://doi.org/10.2307/2261503> |
op_doi |
https://doi.org/10.2307/2261503 |
container_title |
The Journal of Ecology |
container_volume |
81 |
container_issue |
2 |
container_start_page |
335 |
_version_ |
1766251684523147264 |