Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica
ABSTRACT The Dry Valleys of Antarctica are a unique ecosystem of simple trophic structure, where the abiotic factors that influence soil bacterial communities can be resolved in the absence of extensive biotic interactions. This study evaluated the degree to which aspects of topographic, physicochem...
Published in: | FEMS Microbiology Ecology |
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Oxford University Press (OUP)
2020
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croxfordunivpr:10.1093/femsec/fiaa042 2024-09-15T17:46:23+00:00 Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica Bottos, Eric M Laughlin, Daniel C Herbold, Craig W Lee, Charles K McDonald, Ian R Cary, S Craig National Science Foundation New Zealand Marsden Fund 2020 http://dx.doi.org/10.1093/femsec/fiaa042 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiaa042/32990612/fiaa042.pdf http://academic.oup.com/femsec/article-pdf/96/5/fiaa042/33144703/fiaa042.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model FEMS Microbiology Ecology volume 96, issue 5 ISSN 0168-6496 1574-6941 journal-article 2020 croxfordunivpr https://doi.org/10.1093/femsec/fiaa042 2024-08-12T04:25:02Z ABSTRACT The Dry Valleys of Antarctica are a unique ecosystem of simple trophic structure, where the abiotic factors that influence soil bacterial communities can be resolved in the absence of extensive biotic interactions. This study evaluated the degree to which aspects of topographic, physicochemical and spatial variation explain patterns of bacterial richness and community composition in 471 soil samples collected across a 220 square kilometer landscape in Southern Victoria Land. Richness was most strongly influenced by physicochemical soil properties, particularly soil conductivity, though significant trends with several topographic and spatial variables were also observed. Structural equation modeling (SEM) supported a final model in which variation in community composition was best explained by physicochemical variables, particularly soil water content, and where the effects of topographic variation were largely mediated through their influence on physicochemical variables. Community dissimilarity increased with distance between samples, and though most of this variation was explained by topographic and physicochemical variation, a small but significant relationship remained after controlling for this environmental variation. As the largest survey of terrestrial bacterial communities of Antarctica completed to date, this work provides fundamental knowledge of the Dry Valleys ecosystem, and has implications globally for understanding environmental factors that influence bacterial distributions. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Oxford University Press FEMS Microbiology Ecology 96 5 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
ABSTRACT The Dry Valleys of Antarctica are a unique ecosystem of simple trophic structure, where the abiotic factors that influence soil bacterial communities can be resolved in the absence of extensive biotic interactions. This study evaluated the degree to which aspects of topographic, physicochemical and spatial variation explain patterns of bacterial richness and community composition in 471 soil samples collected across a 220 square kilometer landscape in Southern Victoria Land. Richness was most strongly influenced by physicochemical soil properties, particularly soil conductivity, though significant trends with several topographic and spatial variables were also observed. Structural equation modeling (SEM) supported a final model in which variation in community composition was best explained by physicochemical variables, particularly soil water content, and where the effects of topographic variation were largely mediated through their influence on physicochemical variables. Community dissimilarity increased with distance between samples, and though most of this variation was explained by topographic and physicochemical variation, a small but significant relationship remained after controlling for this environmental variation. As the largest survey of terrestrial bacterial communities of Antarctica completed to date, this work provides fundamental knowledge of the Dry Valleys ecosystem, and has implications globally for understanding environmental factors that influence bacterial distributions. |
author2 |
National Science Foundation New Zealand Marsden Fund |
format |
Article in Journal/Newspaper |
author |
Bottos, Eric M Laughlin, Daniel C Herbold, Craig W Lee, Charles K McDonald, Ian R Cary, S Craig |
spellingShingle |
Bottos, Eric M Laughlin, Daniel C Herbold, Craig W Lee, Charles K McDonald, Ian R Cary, S Craig Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
author_facet |
Bottos, Eric M Laughlin, Daniel C Herbold, Craig W Lee, Charles K McDonald, Ian R Cary, S Craig |
author_sort |
Bottos, Eric M |
title |
Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
title_short |
Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
title_full |
Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
title_fullStr |
Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
title_full_unstemmed |
Abiotic factors influence patterns of bacterial diversity and community composition in the Dry Valleys of Antarctica |
title_sort |
abiotic factors influence patterns of bacterial diversity and community composition in the dry valleys of antarctica |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/femsec/fiaa042 http://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiaa042/32990612/fiaa042.pdf http://academic.oup.com/femsec/article-pdf/96/5/fiaa042/33144703/fiaa042.pdf |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_source |
FEMS Microbiology Ecology volume 96, issue 5 ISSN 0168-6496 1574-6941 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/femsec/fiaa042 |
container_title |
FEMS Microbiology Ecology |
container_volume |
96 |
container_issue |
5 |
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1810494456257839104 |