Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea
Diatoms form dense blooms in the Pacific Arctic region from spring to summer, supporting the unique benthic-pelagic coupling ecosystems. Although the Arctic has a severe light-limited season from autumn to winter, diatoms can proliferate in spring when sufficient light becomes available for photosyn...
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Online Access: | http://hdl.handle.net/2115/87133 https://doi.org/10.3389/fmars.2022.998711 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/87133 2023-05-15T14:47:08+02:00 Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea Fukai, Yuri Matsuno, Kohei Fujiwara, Amane Suzuki, Koji http://hdl.handle.net/2115/87133 https://doi.org/10.3389/fmars.2022.998711 eng eng Frontiers Media http://hdl.handle.net/2115/87133 Frontiers in Marine Science, 9: 998711 http://dx.doi.org/10.3389/fmars.2022.998711 diatom diatom resting stages photophysiology sediment Pacific Arctic shelves Chukchi Sea 473 article fthokunivhus https://doi.org/10.3389/fmars.2022.998711 2022-11-18T01:07:08Z Diatoms form dense blooms in the Pacific Arctic region from spring to summer, supporting the unique benthic-pelagic coupling ecosystems. Although the Arctic has a severe light-limited season from autumn to winter, diatoms can proliferate in spring when sufficient light becomes available for photosynthesis. One of the crucial strategies for diatoms to survive in unfavorable growing conditions is to form resting stages. Because of enhanced primary and export production in the Pacific Arctic shelves, many viable diatom resting stages can be detected in the surface sediments. However, little is known about the photophysiological response of viable diatom cells, including resting stages, in sediments to light availability. We conducted a laboratory experiment investigating the photophysiological capabilities of the diatom cells containing resting stages using surface sediments from the Chukchi Sea shelf. As a result, diatoms grew dramatically after light exposure, and Chaetoceros socialis complex highly contributed to the enhanced diatom abundance. Their photophysiological changes were also evident from the maximum quantum efficiency (F-v/F-m) of photochemistry in photosystem II, C-13-based photosynthetic-energy (PE) parameters, diadinoxanthin (DD)-diatoxanthin (DT) pool size, and the de-epoxidation state (DES) of DD. Even after the excess light exposure suppressed the photosynthetic activity in the microalgal cells, the diatoms recovered quickly, indicating the high photophysiological plasticity to dynamic light changes. Therefore, our results suggest that diatoms in surface sediments have a high seeding potential for blooms in the Pacific Arctic shelf region. Article in Journal/Newspaper Arctic Chukchi Chukchi Sea Pacific Arctic Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Chukchi Sea Pacific Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
diatom diatom resting stages photophysiology sediment Pacific Arctic shelves Chukchi Sea 473 |
spellingShingle |
diatom diatom resting stages photophysiology sediment Pacific Arctic shelves Chukchi Sea 473 Fukai, Yuri Matsuno, Kohei Fujiwara, Amane Suzuki, Koji Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
topic_facet |
diatom diatom resting stages photophysiology sediment Pacific Arctic shelves Chukchi Sea 473 |
description |
Diatoms form dense blooms in the Pacific Arctic region from spring to summer, supporting the unique benthic-pelagic coupling ecosystems. Although the Arctic has a severe light-limited season from autumn to winter, diatoms can proliferate in spring when sufficient light becomes available for photosynthesis. One of the crucial strategies for diatoms to survive in unfavorable growing conditions is to form resting stages. Because of enhanced primary and export production in the Pacific Arctic shelves, many viable diatom resting stages can be detected in the surface sediments. However, little is known about the photophysiological response of viable diatom cells, including resting stages, in sediments to light availability. We conducted a laboratory experiment investigating the photophysiological capabilities of the diatom cells containing resting stages using surface sediments from the Chukchi Sea shelf. As a result, diatoms grew dramatically after light exposure, and Chaetoceros socialis complex highly contributed to the enhanced diatom abundance. Their photophysiological changes were also evident from the maximum quantum efficiency (F-v/F-m) of photochemistry in photosystem II, C-13-based photosynthetic-energy (PE) parameters, diadinoxanthin (DD)-diatoxanthin (DT) pool size, and the de-epoxidation state (DES) of DD. Even after the excess light exposure suppressed the photosynthetic activity in the microalgal cells, the diatoms recovered quickly, indicating the high photophysiological plasticity to dynamic light changes. Therefore, our results suggest that diatoms in surface sediments have a high seeding potential for blooms in the Pacific Arctic shelf region. |
format |
Article in Journal/Newspaper |
author |
Fukai, Yuri Matsuno, Kohei Fujiwara, Amane Suzuki, Koji |
author_facet |
Fukai, Yuri Matsuno, Kohei Fujiwara, Amane Suzuki, Koji |
author_sort |
Fukai, Yuri |
title |
Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
title_short |
Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
title_full |
Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
title_fullStr |
Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
title_full_unstemmed |
Photophysiological response of diatoms in surface sediments to light exposure : A laboratory experiment on a diatom community in sediments from the Chukchi Sea |
title_sort |
photophysiological response of diatoms in surface sediments to light exposure : a laboratory experiment on a diatom community in sediments from the chukchi sea |
publisher |
Frontiers Media |
url |
http://hdl.handle.net/2115/87133 https://doi.org/10.3389/fmars.2022.998711 |
geographic |
Arctic Chukchi Sea Pacific |
geographic_facet |
Arctic Chukchi Sea Pacific |
genre |
Arctic Chukchi Chukchi Sea Pacific Arctic |
genre_facet |
Arctic Chukchi Chukchi Sea Pacific Arctic |
op_relation |
http://hdl.handle.net/2115/87133 Frontiers in Marine Science, 9: 998711 http://dx.doi.org/10.3389/fmars.2022.998711 |
op_doi |
https://doi.org/10.3389/fmars.2022.998711 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766318270404624384 |