Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland
Direct observations of marine microbial metabolism are sparse in the Arctic, particularly under sea ice during winter. This paper presents the first observations of Arctic winter microbial activity under sea ice in a west Greenland fjord (Lillefjord, ∼ 70∘ N). Here, measured changes in dissolved oxy...
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Copernicus Publications
2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00051343 2023-05-15T14:51:10+02:00 Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland Chandler, David Mackie, Shona 2020-04 electronic https://doi.org/10.5194/essd-12-897-2020 https://noa.gwlb.de/receive/cop_mods_00051343 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050999/essd-12-897-2020.pdf https://essd.copernicus.org/articles/12/897/2020/essd-12-897-2020.pdf eng eng Copernicus Publications Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-12-897-2020 https://noa.gwlb.de/receive/cop_mods_00051343 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050999/essd-12-897-2020.pdf https://essd.copernicus.org/articles/12/897/2020/essd-12-897-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/essd-12-897-2020 2022-02-08T22:36:26Z Direct observations of marine microbial metabolism are sparse in the Arctic, particularly under sea ice during winter. This paper presents the first observations of Arctic winter microbial activity under sea ice in a west Greenland fjord (Lillefjord, ∼ 70∘ N). Here, measured changes in dissolved oxygen (DO) content in light and dark in situ incubations were used to calculate net community productivity, respiration and photosynthesis rates. Data were collected at two fully ice covered sites during February 2013, shortly after the end of the polar night. Averaged over the full study period, dark incubations showed statistically significant decreases in DO of -0.36±0.24 (near shore) and -0.09±0.07 g O2 m−3 d−1 (fjord centre), indicating respiration rates that were 2–20 times greater than rates previously reported under sea ice in the Arctic. Meanwhile, a lack of significant evidence for photosynthesis suggests that the rate of photosynthesis – if it was occurring – was much lower than that of respiration. The data also show no significant evidence of a temporal trend in metabolism rates over the study period; however, ambient seawater DO increased significantly at the fjord centre (0.023±0.013 g O2 m−3 d−1), possibly attributable to processes not occurring in the incubations (such as sea ice algal photosynthesis). These data may improve our understanding of microbial activity in the fjord during winter, and its contribution to Arctic ecosystems under present and future conditions. The data are archived at PANGAEA (https://doi.org/10.1594/PANGAEA.906332, Chandler and Mackie, 2019; https://doi.org/10.1594/PANGAEA.912677, Chandler and Mackie, 2020). Article in Journal/Newspaper Arctic Greenland polar night Sea ice Niedersächsisches Online-Archiv NOA Arctic Greenland Chandler ENVELOPE(-59.682,-59.682,-64.490,-64.490) Earth System Science Data 12 2 897 906 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Chandler, David Mackie, Shona Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
topic_facet |
article Verlagsveröffentlichung |
description |
Direct observations of marine microbial metabolism are sparse in the Arctic, particularly under sea ice during winter. This paper presents the first observations of Arctic winter microbial activity under sea ice in a west Greenland fjord (Lillefjord, ∼ 70∘ N). Here, measured changes in dissolved oxygen (DO) content in light and dark in situ incubations were used to calculate net community productivity, respiration and photosynthesis rates. Data were collected at two fully ice covered sites during February 2013, shortly after the end of the polar night. Averaged over the full study period, dark incubations showed statistically significant decreases in DO of -0.36±0.24 (near shore) and -0.09±0.07 g O2 m−3 d−1 (fjord centre), indicating respiration rates that were 2–20 times greater than rates previously reported under sea ice in the Arctic. Meanwhile, a lack of significant evidence for photosynthesis suggests that the rate of photosynthesis – if it was occurring – was much lower than that of respiration. The data also show no significant evidence of a temporal trend in metabolism rates over the study period; however, ambient seawater DO increased significantly at the fjord centre (0.023±0.013 g O2 m−3 d−1), possibly attributable to processes not occurring in the incubations (such as sea ice algal photosynthesis). These data may improve our understanding of microbial activity in the fjord during winter, and its contribution to Arctic ecosystems under present and future conditions. The data are archived at PANGAEA (https://doi.org/10.1594/PANGAEA.906332, Chandler and Mackie, 2019; https://doi.org/10.1594/PANGAEA.912677, Chandler and Mackie, 2020). |
format |
Article in Journal/Newspaper |
author |
Chandler, David Mackie, Shona |
author_facet |
Chandler, David Mackie, Shona |
author_sort |
Chandler, David |
title |
Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
title_short |
Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
title_full |
Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
title_fullStr |
Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
title_full_unstemmed |
Observations of late-winter marine microbial activity in an ice-covered fjord, west Greenland |
title_sort |
observations of late-winter marine microbial activity in an ice-covered fjord, west greenland |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/essd-12-897-2020 https://noa.gwlb.de/receive/cop_mods_00051343 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050999/essd-12-897-2020.pdf https://essd.copernicus.org/articles/12/897/2020/essd-12-897-2020.pdf |
long_lat |
ENVELOPE(-59.682,-59.682,-64.490,-64.490) |
geographic |
Arctic Greenland Chandler |
geographic_facet |
Arctic Greenland Chandler |
genre |
Arctic Greenland polar night Sea ice |
genre_facet |
Arctic Greenland polar night Sea ice |
op_relation |
Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-12-897-2020 https://noa.gwlb.de/receive/cop_mods_00051343 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050999/essd-12-897-2020.pdf https://essd.copernicus.org/articles/12/897/2020/essd-12-897-2020.pdf |
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https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/essd-12-897-2020 |
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Earth System Science Data |
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