Pigment signatures of phytoplankton communities in the Beaufort Sea
Phytoplankton are expected to respond to recent environmental changes of the Arctic Ocean. In terms of bottom-up control, modifying the phytoplankton distribution will ultimately affect the entire food web and carbon export. However, detecting and quantifying changes in phytoplankton communities in...
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Copernicus Publications
2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00017574 2023-05-15T14:54:44+02:00 Pigment signatures of phytoplankton communities in the Beaufort Sea Coupel, P. Matsuoka, A. Ruiz-Pino, D. Gosselin, M. Marie, D. Tremblay, J.-É. Babin, M. 2015-02 electronic https://doi.org/10.5194/bg-12-991-2015 https://noa.gwlb.de/receive/cop_mods_00017574 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00017529/bg-12-991-2015.pdf https://bg.copernicus.org/articles/12/991/2015/bg-12-991-2015.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-12-991-2015 https://noa.gwlb.de/receive/cop_mods_00017574 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00017529/bg-12-991-2015.pdf https://bg.copernicus.org/articles/12/991/2015/bg-12-991-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/bg-12-991-2015 2022-02-08T22:53:38Z Phytoplankton are expected to respond to recent environmental changes of the Arctic Ocean. In terms of bottom-up control, modifying the phytoplankton distribution will ultimately affect the entire food web and carbon export. However, detecting and quantifying changes in phytoplankton communities in the Arctic Ocean remains difficult because of the lack of data and the inconsistent identification methods used. Based on pigment and microscopy data sampled in the Beaufort Sea during summer 2009, we optimized the chemotaxonomic tool CHEMTAX (CHEMical TAXonomy) for the assessment of phytoplankton community composition in an Arctic setting. The geographical distribution of the main phytoplankton groups was determined with clustering methods. Four phytoplankton assemblages were determined and related to bathymetry, nutrients and light availability. Surface waters across the whole survey region were dominated by prasinophytes and chlorophytes, whereas the subsurface chlorophyll maximum was dominated by the centric diatoms Chaetoceros socialis on the shelf and by two populations of nanoflagellates in the deep basin. Microscopic counts showed a high contribution of the heterotrophic dinoflagellates Gymnodinium and Gyrodinium spp. to total carbon biomass, suggesting high grazing activity at this time of the year. However, CHEMTAX was unable to detect these dinoflagellates because they lack peridinin. In heterotrophic dinoflagellates, the inclusion of the pigments of their prey potentially leads to incorrect group assignments and some misinterpretation of CHEMTAX. Thanks to the high reproducibility of pigment analysis, our results can serve as a baseline to assess change and spatial or temporal variability in several phytoplankton populations that are not affected by these misinterpretations. Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Phytoplankton Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Biogeosciences 12 4 991 1006 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Coupel, P. Matsuoka, A. Ruiz-Pino, D. Gosselin, M. Marie, D. Tremblay, J.-É. Babin, M. Pigment signatures of phytoplankton communities in the Beaufort Sea |
topic_facet |
article Verlagsveröffentlichung |
description |
Phytoplankton are expected to respond to recent environmental changes of the Arctic Ocean. In terms of bottom-up control, modifying the phytoplankton distribution will ultimately affect the entire food web and carbon export. However, detecting and quantifying changes in phytoplankton communities in the Arctic Ocean remains difficult because of the lack of data and the inconsistent identification methods used. Based on pigment and microscopy data sampled in the Beaufort Sea during summer 2009, we optimized the chemotaxonomic tool CHEMTAX (CHEMical TAXonomy) for the assessment of phytoplankton community composition in an Arctic setting. The geographical distribution of the main phytoplankton groups was determined with clustering methods. Four phytoplankton assemblages were determined and related to bathymetry, nutrients and light availability. Surface waters across the whole survey region were dominated by prasinophytes and chlorophytes, whereas the subsurface chlorophyll maximum was dominated by the centric diatoms Chaetoceros socialis on the shelf and by two populations of nanoflagellates in the deep basin. Microscopic counts showed a high contribution of the heterotrophic dinoflagellates Gymnodinium and Gyrodinium spp. to total carbon biomass, suggesting high grazing activity at this time of the year. However, CHEMTAX was unable to detect these dinoflagellates because they lack peridinin. In heterotrophic dinoflagellates, the inclusion of the pigments of their prey potentially leads to incorrect group assignments and some misinterpretation of CHEMTAX. Thanks to the high reproducibility of pigment analysis, our results can serve as a baseline to assess change and spatial or temporal variability in several phytoplankton populations that are not affected by these misinterpretations. |
format |
Article in Journal/Newspaper |
author |
Coupel, P. Matsuoka, A. Ruiz-Pino, D. Gosselin, M. Marie, D. Tremblay, J.-É. Babin, M. |
author_facet |
Coupel, P. Matsuoka, A. Ruiz-Pino, D. Gosselin, M. Marie, D. Tremblay, J.-É. Babin, M. |
author_sort |
Coupel, P. |
title |
Pigment signatures of phytoplankton communities in the Beaufort Sea |
title_short |
Pigment signatures of phytoplankton communities in the Beaufort Sea |
title_full |
Pigment signatures of phytoplankton communities in the Beaufort Sea |
title_fullStr |
Pigment signatures of phytoplankton communities in the Beaufort Sea |
title_full_unstemmed |
Pigment signatures of phytoplankton communities in the Beaufort Sea |
title_sort |
pigment signatures of phytoplankton communities in the beaufort sea |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-991-2015 https://noa.gwlb.de/receive/cop_mods_00017574 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00017529/bg-12-991-2015.pdf https://bg.copernicus.org/articles/12/991/2015/bg-12-991-2015.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Beaufort Sea Phytoplankton |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Phytoplankton |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-12-991-2015 https://noa.gwlb.de/receive/cop_mods_00017574 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00017529/bg-12-991-2015.pdf https://bg.copernicus.org/articles/12/991/2015/bg-12-991-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-12-991-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
4 |
container_start_page |
991 |
op_container_end_page |
1006 |
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1766326489552257024 |