Antarctic lake phytoplankton and bacteria from near‐surface waters exhibit high sensitivity to climate‐driven disturbance
Abstract 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 cov...
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crwiley:10.1111/1462-2920.16113 2024-09-15T17:45:13+00:00 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. U.S. Department of Energy Lawrence Livermore National Laboratory National Science Foundation 2022 http://dx.doi.org/10.1111/1462-2920.16113 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16113 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1462-2920.16113 https://sfamjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16113 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ Environmental Microbiology volume 24, issue 12, page 6017-6032 ISSN 1462-2912 1462-2920 journal-article 2022 crwiley https://doi.org/10.1111/1462-2920.16113 2024-08-22T04:17:46Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys Wiley Online Library Environmental Microbiology |
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Wiley Online Library |
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English |
description |
Abstract 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. |
author2 |
U.S. Department of Energy Lawrence Livermore National Laboratory National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Sherwell, Shasten Kalra, Isha Li, Wei McKnight, Diane M. Priscu, John C. Morgan‐Kiss, Rachael M. |
spellingShingle |
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 |
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 |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/1462-2920.16113 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16113 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1462-2920.16113 https://sfamjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16113 |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
op_source |
Environmental Microbiology volume 24, issue 12, page 6017-6032 ISSN 1462-2912 1462-2920 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/1462-2920.16113 |
container_title |
Environmental Microbiology |
_version_ |
1810492965657772032 |