Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters
Abstract The Arctic Ocean is particularly affected by climate change with unknown consequences for primary productivity. Diazotrophs—prokaryotes capable of converting atmospheric nitrogen to ammonia—have been detected in the often nitrogen-limited Arctic Ocean but distribution and community composit...
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2023
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croxfordunivpr:10.1093/femsec/fiad067 2024-04-28T08:06:12+00:00 Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters von Friesen, Lisa W Paulsen, Maria L Müller, Oliver Gründger, Friederike Riemann, Lasse Danish Council for Independent Research Research Council of Norway Villum Foundation 2023 http://dx.doi.org/10.1093/femsec/fiad067 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad067/50683648/fiad067.pdf https://academic.oup.com/femsec/article-pdf/99/8/fiad067/51708065/fiad067.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model FEMS Microbiology Ecology volume 99, issue 8 ISSN 1574-6941 Applied Microbiology and Biotechnology Ecology Microbiology journal-article 2023 croxfordunivpr https://doi.org/10.1093/femsec/fiad067 2024-04-02T08:05:27Z Abstract The Arctic Ocean is particularly affected by climate change with unknown consequences for primary productivity. Diazotrophs—prokaryotes capable of converting atmospheric nitrogen to ammonia—have been detected in the often nitrogen-limited Arctic Ocean but distribution and community composition dynamics are largely unknown. We performed amplicon sequencing of the diazotroph marker gene nifH from glacial rivers, coastal, and open ocean regions and identified regionally distinct Arctic communities. Proteobacterial diazotrophs dominated all seasons, epi- to mesopelagic depths and rivers to open waters and, surprisingly, Cyanobacteria were only sporadically identified in coastal and freshwaters. The upstream environment of glacial rivers influenced diazotroph diversity, and in marine samples putative anaerobic sulphate-reducers showed seasonal succession with highest prevalence in summer to polar night. Betaproteobacteria (Burkholderiales, Nitrosomonadales, and Rhodocyclales) were typically found in rivers and freshwater-influenced waters, and Delta- (Desulfuromonadales, Desulfobacterales, and Desulfovibrionales) and Gammaproteobacteria in marine waters. The identified community composition dynamics, likely driven by runoff, inorganic nutrients, particulate organic carbon, and seasonality, imply diazotrophy a phenotype of ecological relevance with expected responsiveness to ongoing climate change. Our study largely expands baseline knowledge of Arctic diazotrophs—a prerequisite to understand underpinning of nitrogen fixation—and supports nitrogen fixation as a contributor of new nitrogen in the rapidly changing Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Climate change polar night Oxford University Press FEMS Microbiology Ecology |
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Open Polar |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Applied Microbiology and Biotechnology Ecology Microbiology |
spellingShingle |
Applied Microbiology and Biotechnology Ecology Microbiology von Friesen, Lisa W Paulsen, Maria L Müller, Oliver Gründger, Friederike Riemann, Lasse Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
topic_facet |
Applied Microbiology and Biotechnology Ecology Microbiology |
description |
Abstract The Arctic Ocean is particularly affected by climate change with unknown consequences for primary productivity. Diazotrophs—prokaryotes capable of converting atmospheric nitrogen to ammonia—have been detected in the often nitrogen-limited Arctic Ocean but distribution and community composition dynamics are largely unknown. We performed amplicon sequencing of the diazotroph marker gene nifH from glacial rivers, coastal, and open ocean regions and identified regionally distinct Arctic communities. Proteobacterial diazotrophs dominated all seasons, epi- to mesopelagic depths and rivers to open waters and, surprisingly, Cyanobacteria were only sporadically identified in coastal and freshwaters. The upstream environment of glacial rivers influenced diazotroph diversity, and in marine samples putative anaerobic sulphate-reducers showed seasonal succession with highest prevalence in summer to polar night. Betaproteobacteria (Burkholderiales, Nitrosomonadales, and Rhodocyclales) were typically found in rivers and freshwater-influenced waters, and Delta- (Desulfuromonadales, Desulfobacterales, and Desulfovibrionales) and Gammaproteobacteria in marine waters. The identified community composition dynamics, likely driven by runoff, inorganic nutrients, particulate organic carbon, and seasonality, imply diazotrophy a phenotype of ecological relevance with expected responsiveness to ongoing climate change. Our study largely expands baseline knowledge of Arctic diazotrophs—a prerequisite to understand underpinning of nitrogen fixation—and supports nitrogen fixation as a contributor of new nitrogen in the rapidly changing Arctic Ocean. |
author2 |
Danish Council for Independent Research Research Council of Norway Villum Foundation |
format |
Article in Journal/Newspaper |
author |
von Friesen, Lisa W Paulsen, Maria L Müller, Oliver Gründger, Friederike Riemann, Lasse |
author_facet |
von Friesen, Lisa W Paulsen, Maria L Müller, Oliver Gründger, Friederike Riemann, Lasse |
author_sort |
von Friesen, Lisa W |
title |
Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
title_short |
Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
title_full |
Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
title_fullStr |
Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
title_full_unstemmed |
Glacial meltwater and seasonality influence community composition of diazotrophs in Arctic coastal and open waters |
title_sort |
glacial meltwater and seasonality influence community composition of diazotrophs in arctic coastal and open waters |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/femsec/fiad067 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad067/50683648/fiad067.pdf https://academic.oup.com/femsec/article-pdf/99/8/fiad067/51708065/fiad067.pdf |
genre |
Arctic Arctic Ocean Climate change polar night |
genre_facet |
Arctic Arctic Ocean Climate change polar night |
op_source |
FEMS Microbiology Ecology volume 99, issue 8 ISSN 1574-6941 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/femsec/fiad067 |
container_title |
FEMS Microbiology Ecology |
_version_ |
1797575812198694912 |