Biogeochemical and ecological variability during the late summer–early autumn transition at an ice‐floe drift station in the Central Arctic Ocean
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 product...
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ftunivnapoliiris:oai:www.iris.unina.it:11588/827913 2024-09-09T19:21:10+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. Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. Ditullio, Giacomo R. 2021 https://hdl.handle.net/11588/827913 https://doi.org/10.1002/lno.11676 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000600502400001 volume:66 firstpage:363 lastpage:382 numberofpages:20 journal:LIMNOLOGY AND OCEANOGRAPHY https://hdl.handle.net/11588/827913 doi:10.1002/lno.11676 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85097846482 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2021 ftunivnapoliiris https://doi.org/10.1002/lno.11676 2024-06-17T15:19:34Z 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 (DMSPp) levels, photosynthetic efficiency, and biological productivity, as estimated by ΔO2/Ar ratios, all decreased. Chemotaxonomic (CHEMTAX) analysis of phytoplankton pigments revealed a taxonomically diverse picoautotrophic community, with chlorophyll (Chl) c3-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, DMSPp 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 IRIS Università degli Studi di Napoli Federico II Arctic Arctic Ocean North Pole Limnology and Oceanography 66 S1 |
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Open Polar |
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IRIS Università degli Studi di Napoli Federico II |
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ftunivnapoliiris |
language |
unknown |
description |
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 (DMSPp) levels, photosynthetic efficiency, and biological productivity, as estimated by ΔO2/Ar ratios, all decreased. Chemotaxonomic (CHEMTAX) analysis of phytoplankton pigments revealed a taxonomically diverse picoautotrophic community, with chlorophyll (Chl) c3-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, DMSPp 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 |
Schanke, Nicole L. Bolinesi, Francesco Mangoni, Olga Katlein, Christian Anhaus, Philipp Hoppmann, Mario Lee, Peter A. Ditullio, Giacomo R. |
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 |
publishDate |
2021 |
url |
https://hdl.handle.net/11588/827913 https://doi.org/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_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000600502400001 volume:66 firstpage:363 lastpage:382 numberofpages:20 journal:LIMNOLOGY AND OCEANOGRAPHY https://hdl.handle.net/11588/827913 doi:10.1002/lno.11676 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85097846482 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.11676 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1809761379524018176 |