Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica
Microbial consortia dominate glacial meltwater streams from polar regions, including the McMurdo Dry Valleys (MDV), where they thrive under physiologically stressful conditions. In this study, we examined microbial mat types and sediments found in 12 hydrologically diverse streams to describe the co...
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ftpubmed:oai:pubmedcentral.nih.gov:5975864 2023-05-15T13:52:55+02:00 Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica Van Horn, David J. Wolf, Caitlin R. Colman, Daniel R. Jiang, Xiaoben Kohler, Tyler J. McKnight, Diane M. Stanish, Lee F. Yazzie, Terrill Takacs-Vesbach, Cristina D. 2016-08-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975864/ http://www.ncbi.nlm.nih.gov/pubmed/27495241 https://doi.org/10.1093/femsec/fiw148 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975864/ http://www.ncbi.nlm.nih.gov/pubmed/27495241 http://dx.doi.org/10.1093/femsec/fiw148 © FEMS 2016. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com Research Article Text 2016 ftpubmed https://doi.org/10.1093/femsec/fiw148 2018-06-10T00:18:48Z Microbial consortia dominate glacial meltwater streams from polar regions, including the McMurdo Dry Valleys (MDV), where they thrive under physiologically stressful conditions. In this study, we examined microbial mat types and sediments found in 12 hydrologically diverse streams to describe the community diversity and composition within and across sites. Sequencing of the 16S rRNA gene from 129 samples revealed ∼24 000 operational taxonomic units (<97% DNA similarity), making streams the most biodiverse habitat in the MDV. Principal coordinate analyses revealed significant but weak clustering by mat type across all streams (ANOSIM R-statistic = 0.28) but stronger clustering within streams (ANOSIM R-statistic from 0.28 to 0.94). Significant relationships (P < 0.05) were found between bacterial diversity and mat ash-free dry mass, suggesting that diversity is related to the hydrologic regimes of the various streams, which are predictive of mat biomass. However, correlations between stream chemistry and community members were weak, possibly reflecting the importance of internal processes and hydrologic conditions. Collectively, these results suggest that localized conditions dictate bacterial community composition of the same mat types and sediments from different streams, and while MDV streams are hotspots of biodiversity in an otherwise depauperate landscape, controls on community structure are complex and site specific. Text Antarc* Antarctica McMurdo Dry Valleys PubMed Central (PMC) McMurdo Dry Valleys FEMS Microbiology Ecology 92 10 fiw148 |
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Research Article Van Horn, David J. Wolf, Caitlin R. Colman, Daniel R. Jiang, Xiaoben Kohler, Tyler J. McKnight, Diane M. Stanish, Lee F. Yazzie, Terrill Takacs-Vesbach, Cristina D. Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
topic_facet |
Research Article |
description |
Microbial consortia dominate glacial meltwater streams from polar regions, including the McMurdo Dry Valleys (MDV), where they thrive under physiologically stressful conditions. In this study, we examined microbial mat types and sediments found in 12 hydrologically diverse streams to describe the community diversity and composition within and across sites. Sequencing of the 16S rRNA gene from 129 samples revealed ∼24 000 operational taxonomic units (<97% DNA similarity), making streams the most biodiverse habitat in the MDV. Principal coordinate analyses revealed significant but weak clustering by mat type across all streams (ANOSIM R-statistic = 0.28) but stronger clustering within streams (ANOSIM R-statistic from 0.28 to 0.94). Significant relationships (P < 0.05) were found between bacterial diversity and mat ash-free dry mass, suggesting that diversity is related to the hydrologic regimes of the various streams, which are predictive of mat biomass. However, correlations between stream chemistry and community members were weak, possibly reflecting the importance of internal processes and hydrologic conditions. Collectively, these results suggest that localized conditions dictate bacterial community composition of the same mat types and sediments from different streams, and while MDV streams are hotspots of biodiversity in an otherwise depauperate landscape, controls on community structure are complex and site specific. |
format |
Text |
author |
Van Horn, David J. Wolf, Caitlin R. Colman, Daniel R. Jiang, Xiaoben Kohler, Tyler J. McKnight, Diane M. Stanish, Lee F. Yazzie, Terrill Takacs-Vesbach, Cristina D. |
author_facet |
Van Horn, David J. Wolf, Caitlin R. Colman, Daniel R. Jiang, Xiaoben Kohler, Tyler J. McKnight, Diane M. Stanish, Lee F. Yazzie, Terrill Takacs-Vesbach, Cristina D. |
author_sort |
Van Horn, David J. |
title |
Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
title_short |
Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
title_full |
Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
title_fullStr |
Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
title_full_unstemmed |
Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica |
title_sort |
patterns of bacterial biodiversity in the glacial meltwater streams of the mcmurdo dry valleys, antarctica |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975864/ http://www.ncbi.nlm.nih.gov/pubmed/27495241 https://doi.org/10.1093/femsec/fiw148 |
geographic |
McMurdo Dry Valleys |
geographic_facet |
McMurdo Dry Valleys |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975864/ http://www.ncbi.nlm.nih.gov/pubmed/27495241 http://dx.doi.org/10.1093/femsec/fiw148 |
op_rights |
© FEMS 2016. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com |
op_doi |
https://doi.org/10.1093/femsec/fiw148 |
container_title |
FEMS Microbiology Ecology |
container_volume |
92 |
container_issue |
10 |
container_start_page |
fiw148 |
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1766257762589736960 |