Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation
Climate changes interacting with human activities are raising the temperature in global oceans. To explore physiological responses of in situ phytoplankton assemblages to increasing temperatures, we conducted a shipboard experiment in tropical regions of the eastern Indian Ocean, Java Sea, and south...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-07-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2021.710697/full |
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| author | Guangming Mai Guangming Mai Guangming Mai Jihua Liu Xiaomin Xia Xiaomin Xia Xiaomin Xia Xinyue Pang Binkai Li Linghui Yu Yehui Tan Yehui Tan Yehui Tan Xingyu Song Xingyu Song Xingyu Song Xingyu Song Gang Li Gang Li Gang Li |
| author_facet | Guangming Mai Guangming Mai Guangming Mai Jihua Liu Xiaomin Xia Xiaomin Xia Xiaomin Xia Xinyue Pang Binkai Li Linghui Yu Yehui Tan Yehui Tan Yehui Tan Xingyu Song Xingyu Song Xingyu Song Xingyu Song Gang Li Gang Li Gang Li |
| author_sort | Guangming Mai |
| collection | DOAJ |
| description | Climate changes interacting with human activities are raising the temperature in global oceans. To explore physiological responses of in situ phytoplankton assemblages to increasing temperatures, we conducted a shipboard experiment in tropical regions of the eastern Indian Ocean, Java Sea, and southern South China Sea. Throughout the surveyed areas, phytoplankton biomass (Chla) ranged from 0.09 to 0.86 μg L−1 (median, 0.22 μg L−1) in the surface and from 0.30 to 0.99 μg L−1 (median, 0.50 μg L−1) in maximal chlorophyll layer (DCM), respectively. Picophytoplankton that occupied 27–89% (79%) and 83–92% (88%) of total Chla in the surface and DCM layers, ranged from 0.32 × 104 to 23.10 × 104 cells mL−1 (3.69 × 104 cells mL−1) and from 7.44 × 104 to 25.70 × 104 cells mL−1 (12.60 × 104 cells mL−1), respectively. Synechococcus took up 30–97% (78%) of pico-cells compositions in the surface layer, while, in the DCM layer, Prochlorococcus took up 42–98% (91%). Moreover, the maximal photochemical quantum yield (FV/FM) of photosystem II (PS II) and the rapid light curve (RLC)-derived light utilization efficiency (α) were lower in the surface layer than that in the DCM layer, but the saturation irradiance (EK) was higher. In particular, we found that acutely rising temperature decreased the FV/FM and α in both the surface and the DCM layers but increased the absorption cross-section (σPSII) of PSII photochemistry. Our results clearly indicate that the presently rising temperature adversely affects the photophysiology of natural phytoplankton assemblages in tropical oceans. |
| first_indexed | 2024-12-18T01:41:35Z |
| format | Article |
| id | doaj.art-0ec7651f61ff45558d1bca8b799766d6 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-18T01:41:35Z |
| publishDate | 2021-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-0ec7651f61ff45558d1bca8b799766d62022-12-21T21:25:18ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452021-07-01810.3389/fmars.2021.710697710697Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale InvestigationGuangming Mai0Guangming Mai1Guangming Mai2Jihua Liu3Xiaomin Xia4Xiaomin Xia5Xiaomin Xia6Xinyue Pang7Binkai Li8Linghui Yu9Yehui Tan10Yehui Tan11Yehui Tan12Xingyu Song13Xingyu Song14Xingyu Song15Xingyu Song16Gang Li17Gang Li18Gang Li19Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, ChinaKey Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, ChinaQinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, ChinaState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaKey Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaNansha Marne Ecological and Environmental Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaKey Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaClimate changes interacting with human activities are raising the temperature in global oceans. To explore physiological responses of in situ phytoplankton assemblages to increasing temperatures, we conducted a shipboard experiment in tropical regions of the eastern Indian Ocean, Java Sea, and southern South China Sea. Throughout the surveyed areas, phytoplankton biomass (Chla) ranged from 0.09 to 0.86 μg L−1 (median, 0.22 μg L−1) in the surface and from 0.30 to 0.99 μg L−1 (median, 0.50 μg L−1) in maximal chlorophyll layer (DCM), respectively. Picophytoplankton that occupied 27–89% (79%) and 83–92% (88%) of total Chla in the surface and DCM layers, ranged from 0.32 × 104 to 23.10 × 104 cells mL−1 (3.69 × 104 cells mL−1) and from 7.44 × 104 to 25.70 × 104 cells mL−1 (12.60 × 104 cells mL−1), respectively. Synechococcus took up 30–97% (78%) of pico-cells compositions in the surface layer, while, in the DCM layer, Prochlorococcus took up 42–98% (91%). Moreover, the maximal photochemical quantum yield (FV/FM) of photosystem II (PS II) and the rapid light curve (RLC)-derived light utilization efficiency (α) were lower in the surface layer than that in the DCM layer, but the saturation irradiance (EK) was higher. In particular, we found that acutely rising temperature decreased the FV/FM and α in both the surface and the DCM layers but increased the absorption cross-section (σPSII) of PSII photochemistry. Our results clearly indicate that the presently rising temperature adversely affects the photophysiology of natural phytoplankton assemblages in tropical oceans.https://www.frontiersin.org/articles/10.3389/fmars.2021.710697/fullrising temperaturephotosynthetic performancephytoplankton assemblagescommunity structuretropical oceans |
| spellingShingle | Guangming Mai Guangming Mai Guangming Mai Jihua Liu Xiaomin Xia Xiaomin Xia Xiaomin Xia Xinyue Pang Binkai Li Linghui Yu Yehui Tan Yehui Tan Yehui Tan Xingyu Song Xingyu Song Xingyu Song Xingyu Song Gang Li Gang Li Gang Li Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation Frontiers in Marine Science rising temperature photosynthetic performance phytoplankton assemblages community structure tropical oceans |
| title | Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation |
| title_full | Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation |
| title_fullStr | Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation |
| title_full_unstemmed | Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation |
| title_short | Acutely Rising Temperature Reduces Photosynthetic Capacity of Phytoplankton Assemblages in Tropical Oceans: A Large-Scale Investigation |
| title_sort | acutely rising temperature reduces photosynthetic capacity of phytoplankton assemblages in tropical oceans a large scale investigation |
| topic | rising temperature photosynthetic performance phytoplankton assemblages community structure tropical oceans |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2021.710697/full |
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