Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018
In recent years, the northern Bering Sea has experienced changes in the timing of sea-ice retreat and in hydrographic conditions during the summer. The influence of these environmental changes on the diatom community has not been examined. In this study, we investigated the spatial changes in the di...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/87787 2023-05-15T15:43:15+02:00 Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 Fukai, Yuri Abe, Yoshiyuki Matsuno, Kohei Yamaguchi, Atsushi http://hdl.handle.net/2115/87787 https://doi.org/10.1016/j.dsr2.2020.104903 eng eng Elsevier http://hdl.handle.net/2115/87787 Deep Sea Research Part II Topical Studies in Oceanography, 181-182: 104903 http://dx.doi.org/10.1016/j.dsr2.2020.104903 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Northern Bering Sea Phytoplankton community Diatoms Year-to-year changes 474 article (author version) fthokunivhus https://doi.org/10.1016/j.dsr2.2020.104903 2023-02-03T01:02:35Z In recent years, the northern Bering Sea has experienced changes in the timing of sea-ice retreat and in hydrographic conditions during the summer. The influence of these environmental changes on the diatom community has not been examined. In this study, we investigated the spatial changes in the diatom community of the northern Bering Sea during the summers of 2017 and 2018, and evaluated the effects of environmental variability on these communities. We found that the diatom cell density and diversity varied with water masses. A cluster analysis based on cell density revealed that the diatom communities were separated into four groups, and that the distributions of three of these groups were different spatially between 2017 and 2018. In the Bering Strait and the Chirikov Basin regions, the diatom communities differed between 2017 and 2018. In 2017, these diatom communities were dominated by cold-water species such as Chaetoceros gelidus and Chaetoceros spp. (subgenus Hyalochaetae), while in 2018, the community was dominated by cosmopolitan species such as Thalassionema nitzschioides and Chaetoceros spp. (subgenus Phaeoceros). NMDS and multiple regression analysis indicated that the timing of the sea-ice retreat was the most important contributor to the differences in the diatom community. In contrast, there was no year-to-year difference south of St. Lawrence Island, possibly because nutrients were depleted and phytoplankton types other than diatoms were dominant. Article in Journal/Newspaper Bering Sea Bering Strait Sea ice St Lawrence Island Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Bering Sea Bering Strait Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) Deep Sea Research Part II: Topical Studies in Oceanography 181-182 104903 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Northern Bering Sea Phytoplankton community Diatoms Year-to-year changes 474 |
spellingShingle |
Northern Bering Sea Phytoplankton community Diatoms Year-to-year changes 474 Fukai, Yuri Abe, Yoshiyuki Matsuno, Kohei Yamaguchi, Atsushi Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
topic_facet |
Northern Bering Sea Phytoplankton community Diatoms Year-to-year changes 474 |
description |
In recent years, the northern Bering Sea has experienced changes in the timing of sea-ice retreat and in hydrographic conditions during the summer. The influence of these environmental changes on the diatom community has not been examined. In this study, we investigated the spatial changes in the diatom community of the northern Bering Sea during the summers of 2017 and 2018, and evaluated the effects of environmental variability on these communities. We found that the diatom cell density and diversity varied with water masses. A cluster analysis based on cell density revealed that the diatom communities were separated into four groups, and that the distributions of three of these groups were different spatially between 2017 and 2018. In the Bering Strait and the Chirikov Basin regions, the diatom communities differed between 2017 and 2018. In 2017, these diatom communities were dominated by cold-water species such as Chaetoceros gelidus and Chaetoceros spp. (subgenus Hyalochaetae), while in 2018, the community was dominated by cosmopolitan species such as Thalassionema nitzschioides and Chaetoceros spp. (subgenus Phaeoceros). NMDS and multiple regression analysis indicated that the timing of the sea-ice retreat was the most important contributor to the differences in the diatom community. In contrast, there was no year-to-year difference south of St. Lawrence Island, possibly because nutrients were depleted and phytoplankton types other than diatoms were dominant. |
format |
Article in Journal/Newspaper |
author |
Fukai, Yuri Abe, Yoshiyuki Matsuno, Kohei Yamaguchi, Atsushi |
author_facet |
Fukai, Yuri Abe, Yoshiyuki Matsuno, Kohei Yamaguchi, Atsushi |
author_sort |
Fukai, Yuri |
title |
Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
title_short |
Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
title_full |
Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
title_fullStr |
Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
title_full_unstemmed |
Spatial changes in the summer diatom community of the northern Bering Sea in 2017 and 2018 |
title_sort |
spatial changes in the summer diatom community of the northern bering sea in 2017 and 2018 |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/87787 https://doi.org/10.1016/j.dsr2.2020.104903 |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Bering Sea Bering Strait Lawrence Island |
geographic_facet |
Bering Sea Bering Strait Lawrence Island |
genre |
Bering Sea Bering Strait Sea ice St Lawrence Island |
genre_facet |
Bering Sea Bering Strait Sea ice St Lawrence Island |
op_relation |
http://hdl.handle.net/2115/87787 Deep Sea Research Part II Topical Studies in Oceanography, 181-182: 104903 http://dx.doi.org/10.1016/j.dsr2.2020.104903 |
op_rights |
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.dsr2.2020.104903 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
181-182 |
container_start_page |
104903 |
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1766377301550825472 |