The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea
Climate change has led to a ~ 40% reduction in summer Arctic sea-ice cover extent since the 1970s. Resultant increases in light availability may enhance phytoplankton production. Direct evidence for factors currently constraining summertime phytoplankton growth in the Arctic region is however lackin...
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ftunivlleida:oai:repositori.udl.cat:10459.1/70620 2023-05-15T14:52:02+02:00 The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea Krisch, Stephan Browning, Thomas J. Graeve, Martin Ludwichowski, Kai-Uwe Lodeiro, Pablo Hopwood, Mark J. Roig, Stéphane Yong, Jaw-Chuen Kanzow, Torsten Achterberg, Eric P. 2021-02-25T08:09:01Z application/pdf http://hdl.handle.net/10459.1/70620 https://doi.org/10.1038/s41598-020-72100-9 eng eng Springer Nature Reproducció del document publicat a: https://doi.org/10.1038/s41598-020-72100-9 Scientific Reports, 2020, vol. 10, p. 15230 info:eu-repo/grantAgreement/EC/H2020/658035/EU/OceanLiNES 2045-2322 http://hdl.handle.net/10459.1/70620 https://doi.org/10.1038/s41598-020-72100-9 cc-by (c) Krisch, Stephan et al., 2020 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess CC-BY Element cycles Marine chemistry info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivlleida https://doi.org/10.1038/s41598-020-72100-9 2022-04-18T05:16:16Z Climate change has led to a ~ 40% reduction in summer Arctic sea-ice cover extent since the 1970s. Resultant increases in light availability may enhance phytoplankton production. Direct evidence for factors currently constraining summertime phytoplankton growth in the Arctic region is however lacking. GEOTRACES cruise GN05 conducted a Fram Strait transect from Svalbard to the NE Greenland Shelf in summer 2016, sampling for bioessential trace metals (Fe, Co, Zn, Mn) and macronutrients (N, Si, P) at ~ 79°N. Five bioassay experiments were conducted to establish phytoplankton responses to additions of Fe, N, Fe + N and volcanic dust. Ambient nutrient concentrations suggested N and Fe were deficient in surface seawater relative to typical phytoplankton requirements. A west-to-east trend in the relative deficiency of N and Fe was apparent, with N becoming more deficient towards Greenland and Fe more deficient towards Svalbard. This aligned with phytoplankton responses in bioassay experiments, which showed greatest chlorophyll-a increases in + N treatment near Greenland and + N + Fe near Svalbard. Collectively these results suggest primary N limitation of phytoplankton growth throughout the study region, with conditions potentially approaching secondary Fe limitation in the eastern Fram Strait. We suggest that the supply of Atlantic-derived N and Arctic-derived Fe exerts a strong control on summertime nutrient stoichiometry and resultant limitation patterns across the Fram Strait region. S.K. was financed by GEOMAR and the German Research Foundation (DFG Award Number AC 217/1-1 to E.P.A). T.J.B. acknowledges funding from a Marie Skłodowska-Curie Postdoctoral European Fellowship (OceanLiNES; Project ID 658035). Open Access funding provided by Projekt DEAL. Article in Journal/Newspaper Arctic Climate change Fram Strait Greenland Greenland Sea North Greenland Phytoplankton Sea ice Svalbard Universitat de Lleida: Repositori Obert UdL Arctic Greenland Svalbard Scientific Reports 10 1 |
institution |
Open Polar |
collection |
Universitat de Lleida: Repositori Obert UdL |
op_collection_id |
ftunivlleida |
language |
English |
topic |
Element cycles Marine chemistry |
spellingShingle |
Element cycles Marine chemistry Krisch, Stephan Browning, Thomas J. Graeve, Martin Ludwichowski, Kai-Uwe Lodeiro, Pablo Hopwood, Mark J. Roig, Stéphane Yong, Jaw-Chuen Kanzow, Torsten Achterberg, Eric P. The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
topic_facet |
Element cycles Marine chemistry |
description |
Climate change has led to a ~ 40% reduction in summer Arctic sea-ice cover extent since the 1970s. Resultant increases in light availability may enhance phytoplankton production. Direct evidence for factors currently constraining summertime phytoplankton growth in the Arctic region is however lacking. GEOTRACES cruise GN05 conducted a Fram Strait transect from Svalbard to the NE Greenland Shelf in summer 2016, sampling for bioessential trace metals (Fe, Co, Zn, Mn) and macronutrients (N, Si, P) at ~ 79°N. Five bioassay experiments were conducted to establish phytoplankton responses to additions of Fe, N, Fe + N and volcanic dust. Ambient nutrient concentrations suggested N and Fe were deficient in surface seawater relative to typical phytoplankton requirements. A west-to-east trend in the relative deficiency of N and Fe was apparent, with N becoming more deficient towards Greenland and Fe more deficient towards Svalbard. This aligned with phytoplankton responses in bioassay experiments, which showed greatest chlorophyll-a increases in + N treatment near Greenland and + N + Fe near Svalbard. Collectively these results suggest primary N limitation of phytoplankton growth throughout the study region, with conditions potentially approaching secondary Fe limitation in the eastern Fram Strait. We suggest that the supply of Atlantic-derived N and Arctic-derived Fe exerts a strong control on summertime nutrient stoichiometry and resultant limitation patterns across the Fram Strait region. S.K. was financed by GEOMAR and the German Research Foundation (DFG Award Number AC 217/1-1 to E.P.A). T.J.B. acknowledges funding from a Marie Skłodowska-Curie Postdoctoral European Fellowship (OceanLiNES; Project ID 658035). Open Access funding provided by Projekt DEAL. |
format |
Article in Journal/Newspaper |
author |
Krisch, Stephan Browning, Thomas J. Graeve, Martin Ludwichowski, Kai-Uwe Lodeiro, Pablo Hopwood, Mark J. Roig, Stéphane Yong, Jaw-Chuen Kanzow, Torsten Achterberg, Eric P. |
author_facet |
Krisch, Stephan Browning, Thomas J. Graeve, Martin Ludwichowski, Kai-Uwe Lodeiro, Pablo Hopwood, Mark J. Roig, Stéphane Yong, Jaw-Chuen Kanzow, Torsten Achterberg, Eric P. |
author_sort |
Krisch, Stephan |
title |
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
title_short |
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
title_full |
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
title_fullStr |
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
title_full_unstemmed |
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea |
title_sort |
influence of arctic fe and atlantic fixed n on summertime primary production in fram strait, north greenland sea |
publisher |
Springer Nature |
publishDate |
2021 |
url |
http://hdl.handle.net/10459.1/70620 https://doi.org/10.1038/s41598-020-72100-9 |
geographic |
Arctic Greenland Svalbard |
geographic_facet |
Arctic Greenland Svalbard |
genre |
Arctic Climate change Fram Strait Greenland Greenland Sea North Greenland Phytoplankton Sea ice Svalbard |
genre_facet |
Arctic Climate change Fram Strait Greenland Greenland Sea North Greenland Phytoplankton Sea ice Svalbard |
op_relation |
Reproducció del document publicat a: https://doi.org/10.1038/s41598-020-72100-9 Scientific Reports, 2020, vol. 10, p. 15230 info:eu-repo/grantAgreement/EC/H2020/658035/EU/OceanLiNES 2045-2322 http://hdl.handle.net/10459.1/70620 https://doi.org/10.1038/s41598-020-72100-9 |
op_rights |
cc-by (c) Krisch, Stephan et al., 2020 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-72100-9 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
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1766323155676168192 |