Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica
Climate change is driving dramatic variability in sea ice dynamics, a key driver in polar marine ecosystems. Projected changes in Antarctica suggest that regional warming will force dramatic shifts in sea ice thickness and persistence, altering sea ice-associated primary production and deposition to...
Published in: | Frontiers in Microbiology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Frontiers Media SA
2021
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Online Access: | https://hdl.handle.net/10289/16614 https://doi.org/10.3389/fmicb.2021.745915 |
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/16614 2024-06-23T07:46:13+00:00 Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica Currie, Ashleigh Ann Marshall, Alexis J. Lohrer, AM Cummings, VJ Seabrook, S Cary, S. Craig 2021 application/pdf https://hdl.handle.net/10289/16614 https://doi.org/10.3389/fmicb.2021.745915 English eng Frontiers Media SA Frontiers in Microbiology Currie, A. A., Marshall, A. J., Lohrer, A. M., Cummings, V. J., Seabrook, S., & Cary, S. C. (2021). Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica. Frontiers in Microbiology, 12. https://doi.org/10.3389/fmicb.2021.745915 doi:10.3389/fmicb.2021.745915 1664-302X https://hdl.handle.net/10289/16614 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Science & Technology Life Sciences & Biomedicine Microbiology sediment benthic microbial community climate change sea ice organic matter ROSS SEA CLIMATE-CHANGE DIVERSITY CARBON PATTERNS ALGAE BACTERIOPLANKTON BIODIVERSITY BIOGEOGRAPHY PHYLOGENIES 13 Climate Action 14 Life Below Water Journal Article 2021 ftunivwaikato https://doi.org/10.3389/fmicb.2021.745915 2024-06-11T23:50:53Z Climate change is driving dramatic variability in sea ice dynamics, a key driver in polar marine ecosystems. Projected changes in Antarctica suggest that regional warming will force dramatic shifts in sea ice thickness and persistence, altering sea ice-associated primary production and deposition to the seafloor. To improve our understanding of the impacts of sea ice change on benthic ecosystems, we directly compared the benthic microbial communities underlying first-year sea ice (FYI) and multi-year sea ice (MYI). Using two tractable coastal habitats in McMurdo Sound, Antarctica, where FYI (Cape Evans) and MYI (New Harbour) prevail, we show that the structure and composition of the benthic microbial communities reflect the legacy of sea ice dynamics. At Cape Evans, an enrichment of known heterotrophic algal polysaccharide degrading taxa (e.g., Flavobacteriaceae, unclassified Gammaproteobacteria, and Rubritaleaceae) and sulfate-reducing bacteria (e.g., Desulfocapsaceae) correlated with comparatively higher chlorophyll a (14.2±0.8μgg−1) and total organic carbon content (0.33%±0.04), reflecting increased productivity and seafloor deposition beneath FYI. Conversely, at New Harbour, an enrichment of known archaeal (e.g., Nitrosopumilaceae) and bacterial (e.g., Woeseiaceae and Nitrospiraceae) chemoautotrophs was common in sediments with considerably lower chlorophyll a (1.0±0.24μgg−1) and total organic carbon content (0.17%±0.01), reflecting restricted productivity beneath MYI. We also report evidence of a submarine discharge of sub-permafrost brine from Taylor Valley into New Harbour. By comparing our two study sites, we show that under current climate-warming scenarios, changes to sea ice productivity and seafloor deposition are likely to initiate major shifts in benthic microbial communities, with heterotrophic organic matter degradation processes becoming increasingly important. This study provides the first assessment of how legacy sea ice conditions influence benthic microbial communities in Antarctica, ... Article in Journal/Newspaper Antarc* Antarctica Ice McMurdo Sound permafrost Ross Sea Sea ice The University of Waikato: Research Commons Ross Sea McMurdo Sound Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Cape Evans ENVELOPE(161.550,161.550,-75.100,-75.100) New Harbour ENVELOPE(163.850,163.850,-77.600,-77.600) Frontiers in Microbiology 12 |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
Science & Technology Life Sciences & Biomedicine Microbiology sediment benthic microbial community climate change sea ice organic matter ROSS SEA CLIMATE-CHANGE DIVERSITY CARBON PATTERNS ALGAE BACTERIOPLANKTON BIODIVERSITY BIOGEOGRAPHY PHYLOGENIES 13 Climate Action 14 Life Below Water |
spellingShingle |
Science & Technology Life Sciences & Biomedicine Microbiology sediment benthic microbial community climate change sea ice organic matter ROSS SEA CLIMATE-CHANGE DIVERSITY CARBON PATTERNS ALGAE BACTERIOPLANKTON BIODIVERSITY BIOGEOGRAPHY PHYLOGENIES 13 Climate Action 14 Life Below Water Currie, Ashleigh Ann Marshall, Alexis J. Lohrer, AM Cummings, VJ Seabrook, S Cary, S. Craig Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
topic_facet |
Science & Technology Life Sciences & Biomedicine Microbiology sediment benthic microbial community climate change sea ice organic matter ROSS SEA CLIMATE-CHANGE DIVERSITY CARBON PATTERNS ALGAE BACTERIOPLANKTON BIODIVERSITY BIOGEOGRAPHY PHYLOGENIES 13 Climate Action 14 Life Below Water |
description |
Climate change is driving dramatic variability in sea ice dynamics, a key driver in polar marine ecosystems. Projected changes in Antarctica suggest that regional warming will force dramatic shifts in sea ice thickness and persistence, altering sea ice-associated primary production and deposition to the seafloor. To improve our understanding of the impacts of sea ice change on benthic ecosystems, we directly compared the benthic microbial communities underlying first-year sea ice (FYI) and multi-year sea ice (MYI). Using two tractable coastal habitats in McMurdo Sound, Antarctica, where FYI (Cape Evans) and MYI (New Harbour) prevail, we show that the structure and composition of the benthic microbial communities reflect the legacy of sea ice dynamics. At Cape Evans, an enrichment of known heterotrophic algal polysaccharide degrading taxa (e.g., Flavobacteriaceae, unclassified Gammaproteobacteria, and Rubritaleaceae) and sulfate-reducing bacteria (e.g., Desulfocapsaceae) correlated with comparatively higher chlorophyll a (14.2±0.8μgg−1) and total organic carbon content (0.33%±0.04), reflecting increased productivity and seafloor deposition beneath FYI. Conversely, at New Harbour, an enrichment of known archaeal (e.g., Nitrosopumilaceae) and bacterial (e.g., Woeseiaceae and Nitrospiraceae) chemoautotrophs was common in sediments with considerably lower chlorophyll a (1.0±0.24μgg−1) and total organic carbon content (0.17%±0.01), reflecting restricted productivity beneath MYI. We also report evidence of a submarine discharge of sub-permafrost brine from Taylor Valley into New Harbour. By comparing our two study sites, we show that under current climate-warming scenarios, changes to sea ice productivity and seafloor deposition are likely to initiate major shifts in benthic microbial communities, with heterotrophic organic matter degradation processes becoming increasingly important. This study provides the first assessment of how legacy sea ice conditions influence benthic microbial communities in Antarctica, ... |
format |
Article in Journal/Newspaper |
author |
Currie, Ashleigh Ann Marshall, Alexis J. Lohrer, AM Cummings, VJ Seabrook, S Cary, S. Craig |
author_facet |
Currie, Ashleigh Ann Marshall, Alexis J. Lohrer, AM Cummings, VJ Seabrook, S Cary, S. Craig |
author_sort |
Currie, Ashleigh Ann |
title |
Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
title_short |
Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
title_full |
Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
title_fullStr |
Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
title_full_unstemmed |
Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica |
title_sort |
sea ice dynamics drive benthic microbial communities in mcmurdo sound, antarctica |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
https://hdl.handle.net/10289/16614 https://doi.org/10.3389/fmicb.2021.745915 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(161.550,161.550,-75.100,-75.100) ENVELOPE(163.850,163.850,-77.600,-77.600) |
geographic |
Ross Sea McMurdo Sound Taylor Valley Cape Evans New Harbour |
geographic_facet |
Ross Sea McMurdo Sound Taylor Valley Cape Evans New Harbour |
genre |
Antarc* Antarctica Ice McMurdo Sound permafrost Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ice McMurdo Sound permafrost Ross Sea Sea ice |
op_relation |
Frontiers in Microbiology Currie, A. A., Marshall, A. J., Lohrer, A. M., Cummings, V. J., Seabrook, S., & Cary, S. C. (2021). Sea ice dynamics drive benthic microbial communities in McMurdo Sound, Antarctica. Frontiers in Microbiology, 12. https://doi.org/10.3389/fmicb.2021.745915 doi:10.3389/fmicb.2021.745915 1664-302X https://hdl.handle.net/10289/16614 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2021.745915 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1802644584900067328 |