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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ftuniaarhuspubl:oai:pure.atira.dk:publications/53bb85f9-1b92-4de8-8e02-75f74fad65bf 2023-05-15T14:24:03+02:00 Highly Productive Ice Algal Mats in Arctic Melt Ponds:Primary Production and Carbon Turnover Hancke, Kasper Kristiansen, Svein Lund-Hansen, Lars Chresten 2022-04 https://pure.au.dk/portal/da/publications/highly-productive-ice-algal-mats-in-arctic-melt-ponds(53bb85f9-1b92-4de8-8e02-75f74fad65bf).html https://doi.org/10.3389/fmars.2022.841720 http://www.scopus.com/inward/record.url?scp=85129239564&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Hancke , K , Kristiansen , S & Lund-Hansen , L C 2022 , ' Highly Productive Ice Algal Mats in Arctic Melt Ponds : Primary Production and Carbon Turnover ' , Frontiers in Marine Science , vol. 9 , 841720 . https://doi.org/10.3389/fmars.2022.841720 Arctic Ocean carbon turnover ice algae melt ponds oxygen production and consumption photosynthesis article 2022 ftuniaarhuspubl https://doi.org/10.3389/fmars.2022.841720 2022-05-25T22:51:18Z 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 14 C 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. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea ice algae Sea ice Aarhus University: Research Arctic Arctic Ocean Barents Sea Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic Ocean carbon turnover ice algae melt ponds oxygen production and consumption photosynthesis |
spellingShingle |
Arctic Ocean carbon turnover ice algae melt ponds oxygen production and consumption photosynthesis Hancke, Kasper Kristiansen, Svein Lund-Hansen, Lars Chresten Highly Productive Ice Algal Mats in Arctic Melt Ponds:Primary Production and Carbon Turnover |
topic_facet |
Arctic Ocean carbon turnover ice algae melt ponds oxygen production and consumption photosynthesis |
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 14 C 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. |
format |
Article in Journal/Newspaper |
author |
Hancke, Kasper Kristiansen, Svein Lund-Hansen, Lars Chresten |
author_facet |
Hancke, Kasper Kristiansen, Svein Lund-Hansen, Lars 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 |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/highly-productive-ice-algal-mats-in-arctic-melt-ponds(53bb85f9-1b92-4de8-8e02-75f74fad65bf).html https://doi.org/10.3389/fmars.2022.841720 http://www.scopus.com/inward/record.url?scp=85129239564&partnerID=8YFLogxK |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Arctic Ocean Barents Sea ice algae Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea ice algae Sea ice |
op_source |
Hancke , K , Kristiansen , S & Lund-Hansen , L C 2022 , ' Highly Productive Ice Algal Mats in Arctic Melt Ponds : Primary Production and Carbon Turnover ' , Frontiers in Marine Science , vol. 9 , 841720 . https://doi.org/10.3389/fmars.2022.841720 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2022.841720 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766296508876980224 |