Phosphorus dynamics in the Barents Sea
Abstract The Barents Sea is considered a warming hotspot in the Arctic; elevated sea surface temperatures have been accompanied with increased inflow of Atlantic water onto the shelf sea. Such hydrodynamic changes and a concomitant reduction of sea ice coverage enables a prolonged phytoplankton grow...
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crwiley:10.1002/lno.11602 2024-06-02T08:01:28+00:00 Phosphorus dynamics in the Barents Sea Downes, Patrick P. Goult, Stephen J. Woodward, E. Malcolm S. Widdicombe, Claire E. Tait, Karen Dixon, Joanna L. Natural Environment Research Council 2020 http://dx.doi.org/10.1002/lno.11602 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11602 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11602 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11602 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 journal-article 2020 crwiley https://doi.org/10.1002/lno.11602 2024-05-03T11:00:08Z Abstract The Barents Sea is considered a warming hotspot in the Arctic; elevated sea surface temperatures have been accompanied with increased inflow of Atlantic water onto the shelf sea. Such hydrodynamic changes and a concomitant reduction of sea ice coverage enables a prolonged phytoplankton growing season, which will inevitably affect nutrient stoichiometry and the controls on primary production. During the summer of 2018, we investigated the role of phosphorus in mediating primary production in the Barents Sea. Dissolved inorganic phosphorus (DIP), its most bioavailable form, had an average net turnover time of 9.4 ± 4.8 d. The most southern Atlantic influenced station accounted for both the highest rates of primary production (655 mg C m 2 d −1 ) and shortest net DIP turnover (2.8 ± 0.5 d). The fraction of assimilated DIP released as dissolved organic phosphorus (DOP) at this station was < 4% compared to an average of 21% at all other stations. We observed significant differences between phytoplankton communities in Arctic and Atlantic waters within the Barents Sea. Slower DIP turnover and greater release of DOP was associated with Phaeocystis pouchetii dominated communities in Arctic waters. Faster turnover rates and greater phosphorus retention occurred among the Atlantic phytoplankton communities dominated by Emiliania huxleyi . These findings provide baseline measurements of P utilization in the Barents Sea, and suggest increased Atlantic intrusion of this region could be accompanied by more rapid DIP turnover, possibly leading to future P limitation (rather than N limitation) on primary production. Article in Journal/Newspaper Arctic Barents Sea Phytoplankton Sea ice Wiley Online Library Arctic Barents Sea Limnology and Oceanography 66 S1 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The Barents Sea is considered a warming hotspot in the Arctic; elevated sea surface temperatures have been accompanied with increased inflow of Atlantic water onto the shelf sea. Such hydrodynamic changes and a concomitant reduction of sea ice coverage enables a prolonged phytoplankton growing season, which will inevitably affect nutrient stoichiometry and the controls on primary production. During the summer of 2018, we investigated the role of phosphorus in mediating primary production in the Barents Sea. Dissolved inorganic phosphorus (DIP), its most bioavailable form, had an average net turnover time of 9.4 ± 4.8 d. The most southern Atlantic influenced station accounted for both the highest rates of primary production (655 mg C m 2 d −1 ) and shortest net DIP turnover (2.8 ± 0.5 d). The fraction of assimilated DIP released as dissolved organic phosphorus (DOP) at this station was < 4% compared to an average of 21% at all other stations. We observed significant differences between phytoplankton communities in Arctic and Atlantic waters within the Barents Sea. Slower DIP turnover and greater release of DOP was associated with Phaeocystis pouchetii dominated communities in Arctic waters. Faster turnover rates and greater phosphorus retention occurred among the Atlantic phytoplankton communities dominated by Emiliania huxleyi . These findings provide baseline measurements of P utilization in the Barents Sea, and suggest increased Atlantic intrusion of this region could be accompanied by more rapid DIP turnover, possibly leading to future P limitation (rather than N limitation) on primary production. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Downes, Patrick P. Goult, Stephen J. Woodward, E. Malcolm S. Widdicombe, Claire E. Tait, Karen Dixon, Joanna L. |
spellingShingle |
Downes, Patrick P. Goult, Stephen J. Woodward, E. Malcolm S. Widdicombe, Claire E. Tait, Karen Dixon, Joanna L. Phosphorus dynamics in the Barents Sea |
author_facet |
Downes, Patrick P. Goult, Stephen J. Woodward, E. Malcolm S. Widdicombe, Claire E. Tait, Karen Dixon, Joanna L. |
author_sort |
Downes, Patrick P. |
title |
Phosphorus dynamics in the Barents Sea |
title_short |
Phosphorus dynamics in the Barents Sea |
title_full |
Phosphorus dynamics in the Barents Sea |
title_fullStr |
Phosphorus dynamics in the Barents Sea |
title_full_unstemmed |
Phosphorus dynamics in the Barents Sea |
title_sort |
phosphorus dynamics in the barents sea |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11602 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11602 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11602 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11602 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Phytoplankton Sea ice |
genre_facet |
Arctic Barents Sea Phytoplankton Sea ice |
op_source |
Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11602 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1800745837399113728 |