Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean
Abstract As the annual expanse of Arctic summer ice‐cover steadily decreases, concomitant biogeochemical and ecological changes in this region are likely to occur. Because the Central Arctic Ocean is often nutrient and light limited, it is essential to understand how environmental changes will affec...
Published in: | Limnology and Oceanography |
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crwiley:10.1002/lno.11676 2024-06-02T08:01:15+00:00 Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. DiTullio, Giacomo R. National Science Foundation Bundesministerium für Bildung und Forschung 2020 http://dx.doi.org/10.1002/lno.11676 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11676 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11676 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11676 en eng Wiley http://creativecommons.org/licenses/by/4.0/ 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.11676 2024-05-03T11:53:13Z Abstract As the annual expanse of Arctic summer ice‐cover steadily decreases, concomitant biogeochemical and ecological changes in this region are likely to occur. Because the Central Arctic Ocean is often nutrient and light limited, it is essential to understand how environmental changes will affect productivity, phytoplankton species composition, and ensuing changes in biogeochemistry in the region. During the transition from late summer to early autumn, water column sampling of various biogeochemical parameters was conducted along an ice‐floe drift station near the North Pole. Our results show that as the upper water column stratification weakened during the late summer–early autumn transition, nutrient concentrations, particulate dimethylsulfoniopropionate (DMSP p ) levels, photosynthetic efficiency, and biological productivity, as estimated by ΔO 2 /Ar ratios, all decreased. Chemotaxonomic (CHEMTAX) analysis of phytoplankton pigments revealed a taxonomically diverse picoautotrophic community, with chlorophyll (Chl) c 3 ‐containing flagellates and the prasinophyte, Pyramimonas spp., as the most abundant groups, comprising ~ 30% and 20% of the total Chl a (TChl a ) biomass, respectively. In contrast to previous studies, the picoprasinophyte, Micromonas spp., represented only 5% to 10% of the TChl a biomass. Of the nine taxonomic groups identified, DMSP p was most closely associated with Pyramimonas spp., a Chl b ‐containing species not usually considered a high DMSP producer. As the extent and duration of open, ice‐free waters in the Central Arctic Ocean progressively increases, we suggest that enhanced light transmission could potentially expand the ecological niche of Pyramimonas spp. in the region. Article in Journal/Newspaper Arctic Arctic Ocean North Pole Phytoplankton Wiley Online Library Arctic Arctic Ocean North Pole Limnology and Oceanography 66 S1 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract As the annual expanse of Arctic summer ice‐cover steadily decreases, concomitant biogeochemical and ecological changes in this region are likely to occur. Because the Central Arctic Ocean is often nutrient and light limited, it is essential to understand how environmental changes will affect productivity, phytoplankton species composition, and ensuing changes in biogeochemistry in the region. During the transition from late summer to early autumn, water column sampling of various biogeochemical parameters was conducted along an ice‐floe drift station near the North Pole. Our results show that as the upper water column stratification weakened during the late summer–early autumn transition, nutrient concentrations, particulate dimethylsulfoniopropionate (DMSP p ) levels, photosynthetic efficiency, and biological productivity, as estimated by ΔO 2 /Ar ratios, all decreased. Chemotaxonomic (CHEMTAX) analysis of phytoplankton pigments revealed a taxonomically diverse picoautotrophic community, with chlorophyll (Chl) c 3 ‐containing flagellates and the prasinophyte, Pyramimonas spp., as the most abundant groups, comprising ~ 30% and 20% of the total Chl a (TChl a ) biomass, respectively. In contrast to previous studies, the picoprasinophyte, Micromonas spp., represented only 5% to 10% of the TChl a biomass. Of the nine taxonomic groups identified, DMSP p was most closely associated with Pyramimonas spp., a Chl b ‐containing species not usually considered a high DMSP producer. As the extent and duration of open, ice‐free waters in the Central Arctic Ocean progressively increases, we suggest that enhanced light transmission could potentially expand the ecological niche of Pyramimonas spp. in the region. |
author2 |
National Science Foundation Bundesministerium für Bildung und Forschung |
format |
Article in Journal/Newspaper |
author |
Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. DiTullio, Giacomo R. |
spellingShingle |
Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. DiTullio, Giacomo R. Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
author_facet |
Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. DiTullio, Giacomo R. |
author_sort |
Schanke, Nicole L. |
title |
Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
title_short |
Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
title_full |
Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
title_fullStr |
Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
title_full_unstemmed |
Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean |
title_sort |
biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the central arctic ocean |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11676 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11676 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11676 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11676 |
geographic |
Arctic Arctic Ocean North Pole |
geographic_facet |
Arctic Arctic Ocean North Pole |
genre |
Arctic Arctic Ocean North Pole Phytoplankton |
genre_facet |
Arctic Arctic Ocean North Pole Phytoplankton |
op_source |
Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11676 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1800745552947707904 |