Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance
The McMurdo Dry Valleys (MDVs), Antarctica, represent a cold, desert ecosystem poised on the threshold of melting and freezing water. The MDVs have experienced dramatic signs of climatic change, most notably a warm austral summer in 2001–2002 that caused widespread flooding, partial ice cover loss a...
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ftpubmed:oai:pubmedcentral.nih.gov:10084183 2023-06-06T11:45:21+02:00 Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance Sherwell, Shasten Kalra, Isha Li, Wei McKnight, Diane M. Priscu, John C. Morgan‐Kiss, Rachael M. 2022-07-20 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10084183/ http://www.ncbi.nlm.nih.gov/pubmed/35860854 https://doi.org/10.1111/1462-2920.16113 en eng John Wiley & Sons, Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10084183/ http://www.ncbi.nlm.nih.gov/pubmed/35860854 http://dx.doi.org/10.1111/1462-2920.16113 © 2022 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. Environ Microbiol Research Articles Text 2022 ftpubmed https://doi.org/10.1111/1462-2920.16113 2023-04-16T00:48:39Z The McMurdo Dry Valleys (MDVs), Antarctica, represent a cold, desert ecosystem poised on the threshold of melting and freezing water. The MDVs have experienced dramatic signs of climatic change, most notably a warm austral summer in 2001–2002 that caused widespread flooding, partial ice cover loss and lake level rise. To understand the impact of these climatic disturbances on lake microbial communities, we simulated lake level rise and ice‐cover loss by transplanting dialysis‐bagged communities from selected depths to other locations in the water column or to an open water perimeter moat. Bacteria and eukaryote communities residing in the surface waters (5 m) exhibited shifts in community composition when exposed to either disturbance, while microbial communities from below the surface were largely unaffected by the transplant. We also observed an accumulation of labile dissolved organic carbon in the transplanted surface communities. In addition, there were taxa‐specific sensitivities: cryptophytes and Actinobacteria were highly sensitive particularly to the moat transplant, while chlorophytes and several bacterial taxa increased in relative abundance or were unaffected. Our results reveal that future climate‐driven disturbances will likely undermine the stability and productivity of MDV lake phytoplankton and bacterial communities in the surface waters of this extreme environment. Text Antarc* Antarctic Antarctica McMurdo Dry Valleys PubMed Central (PMC) Antarctic Austral McMurdo Dry Valleys Environmental Microbiology 24 12 6017 6032 |
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Research Articles |
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Research Articles Sherwell, Shasten Kalra, Isha Li, Wei McKnight, Diane M. Priscu, John C. Morgan‐Kiss, Rachael M. Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
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Research Articles |
description |
The McMurdo Dry Valleys (MDVs), Antarctica, represent a cold, desert ecosystem poised on the threshold of melting and freezing water. The MDVs have experienced dramatic signs of climatic change, most notably a warm austral summer in 2001–2002 that caused widespread flooding, partial ice cover loss and lake level rise. To understand the impact of these climatic disturbances on lake microbial communities, we simulated lake level rise and ice‐cover loss by transplanting dialysis‐bagged communities from selected depths to other locations in the water column or to an open water perimeter moat. Bacteria and eukaryote communities residing in the surface waters (5 m) exhibited shifts in community composition when exposed to either disturbance, while microbial communities from below the surface were largely unaffected by the transplant. We also observed an accumulation of labile dissolved organic carbon in the transplanted surface communities. In addition, there were taxa‐specific sensitivities: cryptophytes and Actinobacteria were highly sensitive particularly to the moat transplant, while chlorophytes and several bacterial taxa increased in relative abundance or were unaffected. Our results reveal that future climate‐driven disturbances will likely undermine the stability and productivity of MDV lake phytoplankton and bacterial communities in the surface waters of this extreme environment. |
format |
Text |
author |
Sherwell, Shasten Kalra, Isha Li, Wei McKnight, Diane M. Priscu, John C. Morgan‐Kiss, Rachael M. |
author_facet |
Sherwell, Shasten Kalra, Isha Li, Wei McKnight, Diane M. Priscu, John C. Morgan‐Kiss, Rachael M. |
author_sort |
Sherwell, Shasten |
title |
Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
title_short |
Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
title_full |
Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
title_fullStr |
Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
title_full_unstemmed |
Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
title_sort |
antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance |
publisher |
John Wiley & Sons, Inc. |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10084183/ http://www.ncbi.nlm.nih.gov/pubmed/35860854 https://doi.org/10.1111/1462-2920.16113 |
geographic |
Antarctic Austral McMurdo Dry Valleys |
geographic_facet |
Antarctic Austral McMurdo Dry Valleys |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
op_source |
Environ Microbiol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10084183/ http://www.ncbi.nlm.nih.gov/pubmed/35860854 http://dx.doi.org/10.1111/1462-2920.16113 |
op_rights |
© 2022 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
op_doi |
https://doi.org/10.1111/1462-2920.16113 |
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Environmental Microbiology |
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24 |
container_issue |
12 |
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6017 |
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6032 |
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1767947066389037056 |