Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait
Bering Strait is the single gateway between the Arctic and Pacific Oceans, and has localized strong currents, which can exceed 100 cm s-1. Although massive spring phytoplankton blooms and the subsequent production of particulate organic matter that sinks to the seafloor are observed in the surroundi...
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ftdoajarticles:oai:doaj.org/article:91aa2ed6816c467e9e3cef9eb25fae5f 2023-05-15T15:00:46+02:00 Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait Hiroto Abe Makoto Sampei Toru Hirawake Hisatomo Waga Shigeto Nishino Atsushi Ooki 2019-03-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00097 https://doaj.org/article/91aa2ed6816c467e9e3cef9eb25fae5f EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00097/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00097 https://doaj.org/article/91aa2ed6816c467e9e3cef9eb25fae5f Frontiers in Marine Science, Vol 6 (2019) carbon cycle sediment resuspension wind-induced current phytoplankton biological hotspot Pacific Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00097 2022-12-31T14:58:23Z Bering Strait is the single gateway between the Arctic and Pacific Oceans, and has localized strong currents, which can exceed 100 cm s-1. Although massive spring phytoplankton blooms and the subsequent production of particulate organic matter that sinks to the seafloor are observed in the surrounding regions of the Bering Strait, the impact of the locally strong current on the horizontal and vertical transport of the particles remains unclear. Therefore, we conducted year-round mooring measurements from 2016 to 2017 by focusing on near-bottom processes associated with ocean currents. Our time-series analysis showed that high-turbidity events, triggered by strong barotropic currents, occurred near the seafloor in all seasons. Consequently, the fluorescence sensor detected highly concentrated chlorophyll a in the resuspended sediment; however, the amount of chlorophyll a release was seasonal, with large and small amounts being released during the warm and cold seasons, respectively. The small amounts of chlorophyll a may be attributed to small amounts of phytoplankton in the sediment owing to less input of fresh phytoplankton from the overlaying water column and organic matter decomposition in the sediments under no-light conditions. The barotropic currents were modulated by surface winds associated with an intercontinental atmospheric pattern having a 5000-km spatial scale on a timescale of 6 days. The locally strong ocean current in the Bering Strait, driving the upward transport of sediment and the subsequent horizontal transport, may play a vital role in supplying particulate organic matter/phytoplankton/nutrients to the downstream region of the southern Chukchi Sea where the formation of biological hotspots is reported. Article in Journal/Newspaper Arctic Bering Strait Chukchi Chukchi Sea Pacific Arctic Phytoplankton Directory of Open Access Journals: DOAJ Articles Arctic Chukchi Sea Bering Strait Pacific Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
carbon cycle sediment resuspension wind-induced current phytoplankton biological hotspot Pacific Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
carbon cycle sediment resuspension wind-induced current phytoplankton biological hotspot Pacific Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 Hiroto Abe Makoto Sampei Toru Hirawake Hisatomo Waga Shigeto Nishino Atsushi Ooki Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
topic_facet |
carbon cycle sediment resuspension wind-induced current phytoplankton biological hotspot Pacific Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Bering Strait is the single gateway between the Arctic and Pacific Oceans, and has localized strong currents, which can exceed 100 cm s-1. Although massive spring phytoplankton blooms and the subsequent production of particulate organic matter that sinks to the seafloor are observed in the surrounding regions of the Bering Strait, the impact of the locally strong current on the horizontal and vertical transport of the particles remains unclear. Therefore, we conducted year-round mooring measurements from 2016 to 2017 by focusing on near-bottom processes associated with ocean currents. Our time-series analysis showed that high-turbidity events, triggered by strong barotropic currents, occurred near the seafloor in all seasons. Consequently, the fluorescence sensor detected highly concentrated chlorophyll a in the resuspended sediment; however, the amount of chlorophyll a release was seasonal, with large and small amounts being released during the warm and cold seasons, respectively. The small amounts of chlorophyll a may be attributed to small amounts of phytoplankton in the sediment owing to less input of fresh phytoplankton from the overlaying water column and organic matter decomposition in the sediments under no-light conditions. The barotropic currents were modulated by surface winds associated with an intercontinental atmospheric pattern having a 5000-km spatial scale on a timescale of 6 days. The locally strong ocean current in the Bering Strait, driving the upward transport of sediment and the subsequent horizontal transport, may play a vital role in supplying particulate organic matter/phytoplankton/nutrients to the downstream region of the southern Chukchi Sea where the formation of biological hotspots is reported. |
format |
Article in Journal/Newspaper |
author |
Hiroto Abe Makoto Sampei Toru Hirawake Hisatomo Waga Shigeto Nishino Atsushi Ooki |
author_facet |
Hiroto Abe Makoto Sampei Toru Hirawake Hisatomo Waga Shigeto Nishino Atsushi Ooki |
author_sort |
Hiroto Abe |
title |
Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
title_short |
Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
title_full |
Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
title_fullStr |
Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
title_full_unstemmed |
Sediment-Associated Phytoplankton Release From the Seafloor in Response to Wind-Induced Barotropic Currents in the Bering Strait |
title_sort |
sediment-associated phytoplankton release from the seafloor in response to wind-induced barotropic currents in the bering strait |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00097 https://doaj.org/article/91aa2ed6816c467e9e3cef9eb25fae5f |
geographic |
Arctic Chukchi Sea Bering Strait Pacific |
geographic_facet |
Arctic Chukchi Sea Bering Strait Pacific |
genre |
Arctic Bering Strait Chukchi Chukchi Sea Pacific Arctic Phytoplankton |
genre_facet |
Arctic Bering Strait Chukchi Chukchi Sea Pacific Arctic Phytoplankton |
op_source |
Frontiers in Marine Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00097/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00097 https://doaj.org/article/91aa2ed6816c467e9e3cef9eb25fae5f |
op_doi |
https://doi.org/10.3389/fmars.2019.00097 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1766332838329712640 |