DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf
Respiratory activity in the oceans is declining due to the expansion of hypoxic zones and progressive deoxygenation, posing threats to marine organisms along with impacts of concurrent ocean acidification. Therefore, understanding the combined impacts of reduced pO 2 and elevated pCO 2 on marine pri...
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ftfrontimediafig:oai:figshare.com:article/25865860 2024-06-23T07:55:49+00:00 DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf Jia-Zhen Sun Di Zhang Xiangqi Yi John Beardall Kunshan Gao 2024-05-21T04:20:08Z https://doi.org/10.3389/fmars.2024.1387552.s001 https://figshare.com/articles/dataset/DataSheet_1_Ocean_deoxygenation_dampens_resistance_of_diatoms_to_ocean_acidification_in_darkness_pdf/25865860 unknown doi:10.3389/fmars.2024.1387552.s001 https://figshare.com/articles/dataset/DataSheet_1_Ocean_deoxygenation_dampens_resistance_of_diatoms_to_ocean_acidification_in_darkness_pdf/25865860 CC BY 4.0 Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean deoxygenation diatom darkness tolerance prolonged darkness seed bank Dataset 2024 ftfrontimediafig https://doi.org/10.3389/fmars.2024.1387552.s001 2024-05-27T14:31:00Z Respiratory activity in the oceans is declining due to the expansion of hypoxic zones and progressive deoxygenation, posing threats to marine organisms along with impacts of concurrent ocean acidification. Therefore, understanding the combined impacts of reduced pO 2 and elevated pCO 2 on marine primary producers is of considerable significance. Here, to simulate diatoms’ sinking into the aphotic zone of turbid coastal water, we exposed the diatoms Thalassiosira pseudonana and Thalassiosira weissflogii in darkness at 20°C to different levels of pO 2 and pCO 2 conditions for ~3 weeks, and monitored their biomass density, photosynthetic activity and dark respiration, and examined their recovery upon subsequent exposure to light at 20°C, simulating surface water conditions. Along with decreased cell abundance and size, measured photosynthetic capacity and dark respiration rates in these two diatoms both gradually decreased during the prolonged darkness. Reduced pO 2 alone did not negatively affect the photosynthetic machinery in both the dark-survived diatom, and enhanced their subsequent recovery upon light exposure. Nevertheless, the combination of the elevated pCO 2 and reduced pO 2 (equivalent to hypoxia) led to the biomass loss by about 90% in T. pseudonana, and delayed the recovery of both species upon subsequent exposure to light, though it did not reduce the cell concentration of T. weissflogii during the elongated darkness. Our results suggest that reduced O 2 availability diminishes the abilities of the diatoms to cope with the acidic stress associated with ocean acidification, and the expansion of hypoxic waters could delay the photosynthetic recovery of coastal diatoms when they are transported upwards through mixing from dark layers to sunlit waters. Dataset Ocean acidification Frontiers: Figshare |
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Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean deoxygenation diatom darkness tolerance prolonged darkness seed bank |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean deoxygenation diatom darkness tolerance prolonged darkness seed bank Jia-Zhen Sun Di Zhang Xiangqi Yi John Beardall Kunshan Gao DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean deoxygenation diatom darkness tolerance prolonged darkness seed bank |
description |
Respiratory activity in the oceans is declining due to the expansion of hypoxic zones and progressive deoxygenation, posing threats to marine organisms along with impacts of concurrent ocean acidification. Therefore, understanding the combined impacts of reduced pO 2 and elevated pCO 2 on marine primary producers is of considerable significance. Here, to simulate diatoms’ sinking into the aphotic zone of turbid coastal water, we exposed the diatoms Thalassiosira pseudonana and Thalassiosira weissflogii in darkness at 20°C to different levels of pO 2 and pCO 2 conditions for ~3 weeks, and monitored their biomass density, photosynthetic activity and dark respiration, and examined their recovery upon subsequent exposure to light at 20°C, simulating surface water conditions. Along with decreased cell abundance and size, measured photosynthetic capacity and dark respiration rates in these two diatoms both gradually decreased during the prolonged darkness. Reduced pO 2 alone did not negatively affect the photosynthetic machinery in both the dark-survived diatom, and enhanced their subsequent recovery upon light exposure. Nevertheless, the combination of the elevated pCO 2 and reduced pO 2 (equivalent to hypoxia) led to the biomass loss by about 90% in T. pseudonana, and delayed the recovery of both species upon subsequent exposure to light, though it did not reduce the cell concentration of T. weissflogii during the elongated darkness. Our results suggest that reduced O 2 availability diminishes the abilities of the diatoms to cope with the acidic stress associated with ocean acidification, and the expansion of hypoxic waters could delay the photosynthetic recovery of coastal diatoms when they are transported upwards through mixing from dark layers to sunlit waters. |
format |
Dataset |
author |
Jia-Zhen Sun Di Zhang Xiangqi Yi John Beardall Kunshan Gao |
author_facet |
Jia-Zhen Sun Di Zhang Xiangqi Yi John Beardall Kunshan Gao |
author_sort |
Jia-Zhen Sun |
title |
DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
title_short |
DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
title_full |
DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
title_fullStr |
DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
title_full_unstemmed |
DataSheet_1_Ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
title_sort |
datasheet_1_ocean deoxygenation dampens resistance of diatoms to ocean acidification in darkness.pdf |
publishDate |
2024 |
url |
https://doi.org/10.3389/fmars.2024.1387552.s001 https://figshare.com/articles/dataset/DataSheet_1_Ocean_deoxygenation_dampens_resistance_of_diatoms_to_ocean_acidification_in_darkness_pdf/25865860 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.3389/fmars.2024.1387552.s001 https://figshare.com/articles/dataset/DataSheet_1_Ocean_deoxygenation_dampens_resistance_of_diatoms_to_ocean_acidification_in_darkness_pdf/25865860 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/fmars.2024.1387552.s001 |
_version_ |
1802648529782439936 |