Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover
Arctic summer sea ice extent is decreasing and thinning, forming melt ponds that cover more than 50% of the sea ice area during the peak of the melting season. Despite of this, ice algal communities in melt ponds are understudied and so are their contribution to the Arctic Ocean primary production a...
Published in: | Frontiers in Marine Science |
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/3004644 https://doi.org/10.3389/fmars.2022.841720 |
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ftnorskinstvf:oai:niva.brage.unit.no:11250/3004644 2023-05-15T14:40:05+02:00 Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover Hancke, Kasper Kristiansen, Svein Lund-Hansen, Chresten 2022 application/pdf https://hdl.handle.net/11250/3004644 https://doi.org/10.3389/fmars.2022.841720 eng eng Frontiers Norges forskningsråd: 155936 Frontiers in Marine Science. 2022, 9, 841720. urn:issn:2296-7745 https://hdl.handle.net/11250/3004644 https://doi.org/10.3389/fmars.2022.841720 cristin:2018232 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright © 2022 Hancke, Kristiansen and Lund-Hansen. CC-BY 9 Frontiers in Marine Science Peer reviewed Journal article 2022 ftnorskinstvf https://doi.org/10.3389/fmars.2022.841720 2023-02-21T08:45:27Z Arctic summer sea ice extent is decreasing and thinning, forming melt ponds that cover more than 50% of the sea ice area during the peak of the melting season. Despite of this, ice algal communities in melt ponds are understudied and so are their contribution to the Arctic Ocean primary production and carbon turnover. While melt ponds have been considered as low productive, recent studies suggest that accumulated ice algal potentially facilitate high and yet overlooked rates of carbon turnover. Here we report on ice algal communities forming dense mats not previously described, collected from melt ponds in the northern Barents Sea in July. We document on distinct layered and brown colored mats with high carbon assimilation and net primary production rates compared to ice algal communities and aggregates, in fact comparable to benthic microalgae at temperate tidal flats. Rates of gross and net primary production, as well as community respiration rates were obtained from oxygen micro profiling, and carbon assimilation calculations were supported by 14C incubations, pigment analysis and light microscopy examinations. The melt pond algal mats consisted of distinct colored layers and differed from aggregates with a consisted layered structure. We accordingly propose the term melt pond algal mats, and further speculate that these dense ice algal mats may provide an important yet overlooked source of organic carbon in the Arctic food-web. A foodweb component likely very sensitive to climate driven changes in the Arctic Ocean and pan-Arctic seas. publishedVersion Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Sea ice Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Arctic Arctic Ocean Barents Sea Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
Arctic summer sea ice extent is decreasing and thinning, forming melt ponds that cover more than 50% of the sea ice area during the peak of the melting season. Despite of this, ice algal communities in melt ponds are understudied and so are their contribution to the Arctic Ocean primary production and carbon turnover. While melt ponds have been considered as low productive, recent studies suggest that accumulated ice algal potentially facilitate high and yet overlooked rates of carbon turnover. Here we report on ice algal communities forming dense mats not previously described, collected from melt ponds in the northern Barents Sea in July. We document on distinct layered and brown colored mats with high carbon assimilation and net primary production rates compared to ice algal communities and aggregates, in fact comparable to benthic microalgae at temperate tidal flats. Rates of gross and net primary production, as well as community respiration rates were obtained from oxygen micro profiling, and carbon assimilation calculations were supported by 14C incubations, pigment analysis and light microscopy examinations. The melt pond algal mats consisted of distinct colored layers and differed from aggregates with a consisted layered structure. We accordingly propose the term melt pond algal mats, and further speculate that these dense ice algal mats may provide an important yet overlooked source of organic carbon in the Arctic food-web. A foodweb component likely very sensitive to climate driven changes in the Arctic Ocean and pan-Arctic seas. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hancke, Kasper Kristiansen, Svein Lund-Hansen, Chresten |
spellingShingle |
Hancke, Kasper Kristiansen, Svein Lund-Hansen, Chresten Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
author_facet |
Hancke, Kasper Kristiansen, Svein Lund-Hansen, Chresten |
author_sort |
Hancke, Kasper |
title |
Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
title_short |
Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
title_full |
Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
title_fullStr |
Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
title_full_unstemmed |
Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover |
title_sort |
highly productive ice algal mats in arctic melt ponds: primary production and carbon turnover |
publisher |
Frontiers |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3004644 https://doi.org/10.3389/fmars.2022.841720 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Ocean Barents Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Sea ice |
op_source |
9 Frontiers in Marine Science |
op_relation |
Norges forskningsråd: 155936 Frontiers in Marine Science. 2022, 9, 841720. urn:issn:2296-7745 https://hdl.handle.net/11250/3004644 https://doi.org/10.3389/fmars.2022.841720 cristin:2018232 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright © 2022 Hancke, Kristiansen and Lund-Hansen. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.841720 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766312000971866112 |