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...
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Online Access: | https://hdl.handle.net/10037/25335 https://doi.org/10.3389/fmars.2022.841720 |
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ftunivtroemsoe:oai:munin.uit.no:10037/25335 2023-05-15T14:23:16+02:00 Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover Hancke, Kasper Kristiansen, Svein Lund-Hansen, Chresten 2022-04-12 https://hdl.handle.net/10037/25335 https://doi.org/10.3389/fmars.2022.841720 eng eng Frontiers Media Frontiers in Marine Science info:eu-repo/grantAgreement/EC/SOCIETAL CHALLENGES/869154/EU/The future of Arctic coastal ecosystems - Identifying transitions in fjord systems and adjacent coastal areas /FACE-IT/ Hancke K, Kristiansen S, Lund-Hansen. Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover. Frontiers in Marine Science. 2022;9 FRIDAID 2018232 doi:10.3389/fmars.2022.841720 2296-7745 https://hdl.handle.net/10037/25335 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.3389/fmars.2022.841720 2022-06-01T22:58:57Z 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. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Sea ice University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Barents Sea Frontiers in Marine Science 9 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
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. |
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 Media |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/25335 https://doi.org/10.3389/fmars.2022.841720 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Arctic Ocean Barents Sea Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Sea ice |
op_relation |
Frontiers in Marine Science info:eu-repo/grantAgreement/EC/SOCIETAL CHALLENGES/869154/EU/The future of Arctic coastal ecosystems - Identifying transitions in fjord systems and adjacent coastal areas /FACE-IT/ Hancke K, Kristiansen S, Lund-Hansen. Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover. Frontiers in Marine Science. 2022;9 FRIDAID 2018232 doi:10.3389/fmars.2022.841720 2296-7745 https://hdl.handle.net/10037/25335 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.3389/fmars.2022.841720 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766295830048800768 |