Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations
The Arctic Ocean is more susceptible to ocean acidification than other marine environments due to its weaker buffering capacity, while its cold surface water with relatively low salinity promotes atmospheric CO 2 uptake. We studied how sea-ice microbial communities in the central Arctic Ocean may be...
Main Authors: | , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
W&M ScholarWorks
2021
|
Subjects: | |
Online Access: | https://scholarworks.wm.edu/vimsarticles/2038 https://doi.org/10.1002/lno.11690 https://scholarworks.wm.edu/context/vimsarticles/article/3037/viewcontent/lno.11690.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3037/filename/0/type/additional/viewcontent/lno11690_sup_0001_supinfo.docx |
id |
ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-3037 |
---|---|
record_format |
openpolar |
spelling |
ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-3037 2023-06-11T04:08:38+02:00 Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations Torstensson, Anders Margolin, Andrew R. Showalter, Gordon M. Smith, Walker O., Jr Shadwick, Elizabeth H. 2021-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/2038 https://doi.org/10.1002/lno.11690 https://scholarworks.wm.edu/context/vimsarticles/article/3037/viewcontent/lno.11690.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3037/filename/0/type/additional/viewcontent/lno11690_sup_0001_supinfo.docx unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/2038 doi: doi:10.1002/lno.11690 https://scholarworks.wm.edu/context/vimsarticles/article/3037/viewcontent/lno.11690.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3037/filename/0/type/additional/viewcontent/lno11690_sup_0001_supinfo.docx http://creativecommons.org/licenses/by/4.0/ VIMS Articles Physical Sciences Peer-Reviewed Articles Oceanography text 2021 ftwilliammarycol https://doi.org/10.1002/lno.11690</p>10.1002/lno.11690 2023-05-04T17:49:10Z The Arctic Ocean is more susceptible to ocean acidification than other marine environments due to its weaker buffering capacity, while its cold surface water with relatively low salinity promotes atmospheric CO 2 uptake. We studied how sea-ice microbial communities in the central Arctic Ocean may be affected by changes in the carbonate system expected as a consequence of ocean acidification. In a series of four experiments during late summer 2018 aboard the icebreaker Oden, we addressed microbial growth, production of dissolved organic carbon (DOC) and extra- cellular polymeric substances (EPS), photosynthetic activity, and bacterial assemblage structure as sea-ice microbial communities were exposed to elevated partial pressures of CO 2 (pCO 2 ). We incubated intact, bottom ice-core sections and dislodged, under-ice algal aggregates (dominated by Melosira arctica) in separate experiments under approximately 400, 650, 1000, and 2000 micro atm pCO 2 for 10 d under different nutrient regimes. The results indicate that the growth of sea-ice algae and bacteria was unaffected by these higher pCO 2 levels, and concentrations of DOC and EPS were unaffected by a shifted inorganic C/N balance, resulting from the CO 2 enrichment. These central Arctic sea-ice microbial communities thus appear to be largely insensitive to short-term pCO 2 perturbations. Given the natural, seasonally driven fluctuations in the carbonate system of sea ice, its resident microorganisms may be sufficiently tolerant of large variations in pCO 2 and thus less vulnerable than pelagic communities to the impacts of ocean acidification, increasing the ecological importance of sea-ice microorganisms even as the loss of Arctic sea ice continues Text Arctic Arctic Ocean ice algae ice core Ocean acidification oden Sea ice W&M ScholarWorks Arctic Arctic Ocean |
institution |
Open Polar |
collection |
W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
language |
unknown |
topic |
Physical Sciences Peer-Reviewed Articles Oceanography |
spellingShingle |
Physical Sciences Peer-Reviewed Articles Oceanography Torstensson, Anders Margolin, Andrew R. Showalter, Gordon M. Smith, Walker O., Jr Shadwick, Elizabeth H. Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
topic_facet |
Physical Sciences Peer-Reviewed Articles Oceanography |
description |
The Arctic Ocean is more susceptible to ocean acidification than other marine environments due to its weaker buffering capacity, while its cold surface water with relatively low salinity promotes atmospheric CO 2 uptake. We studied how sea-ice microbial communities in the central Arctic Ocean may be affected by changes in the carbonate system expected as a consequence of ocean acidification. In a series of four experiments during late summer 2018 aboard the icebreaker Oden, we addressed microbial growth, production of dissolved organic carbon (DOC) and extra- cellular polymeric substances (EPS), photosynthetic activity, and bacterial assemblage structure as sea-ice microbial communities were exposed to elevated partial pressures of CO 2 (pCO 2 ). We incubated intact, bottom ice-core sections and dislodged, under-ice algal aggregates (dominated by Melosira arctica) in separate experiments under approximately 400, 650, 1000, and 2000 micro atm pCO 2 for 10 d under different nutrient regimes. The results indicate that the growth of sea-ice algae and bacteria was unaffected by these higher pCO 2 levels, and concentrations of DOC and EPS were unaffected by a shifted inorganic C/N balance, resulting from the CO 2 enrichment. These central Arctic sea-ice microbial communities thus appear to be largely insensitive to short-term pCO 2 perturbations. Given the natural, seasonally driven fluctuations in the carbonate system of sea ice, its resident microorganisms may be sufficiently tolerant of large variations in pCO 2 and thus less vulnerable than pelagic communities to the impacts of ocean acidification, increasing the ecological importance of sea-ice microorganisms even as the loss of Arctic sea ice continues |
format |
Text |
author |
Torstensson, Anders Margolin, Andrew R. Showalter, Gordon M. Smith, Walker O., Jr Shadwick, Elizabeth H. |
author_facet |
Torstensson, Anders Margolin, Andrew R. Showalter, Gordon M. Smith, Walker O., Jr Shadwick, Elizabeth H. |
author_sort |
Torstensson, Anders |
title |
Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
title_short |
Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
title_full |
Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
title_fullStr |
Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
title_full_unstemmed |
Sea-ice microbial communities in the Central Arctic Ocean: Limited responses to short-term pCO(2) perturbations |
title_sort |
sea-ice microbial communities in the central arctic ocean: limited responses to short-term pco(2) perturbations |
publisher |
W&M ScholarWorks |
publishDate |
2021 |
url |
https://scholarworks.wm.edu/vimsarticles/2038 https://doi.org/10.1002/lno.11690 https://scholarworks.wm.edu/context/vimsarticles/article/3037/viewcontent/lno.11690.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3037/filename/0/type/additional/viewcontent/lno11690_sup_0001_supinfo.docx |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean ice algae ice core Ocean acidification oden Sea ice |
genre_facet |
Arctic Arctic Ocean ice algae ice core Ocean acidification oden Sea ice |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/2038 doi: doi:10.1002/lno.11690 https://scholarworks.wm.edu/context/vimsarticles/article/3037/viewcontent/lno.11690.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3037/filename/0/type/additional/viewcontent/lno11690_sup_0001_supinfo.docx |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11690</p>10.1002/lno.11690 |
_version_ |
1768382016071401472 |