In situ phytoplankton photosynthetic characteristics and their controlling factors in the eastern Indian Ocean
文献类型：期刊论文
| 作者 | Wang, Feng3,4 ; Guo, Shujin1,2,4; Liang, Junhua1,2,4; Sun, Xiaoxia1,2,3,4
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| 刊名 | MARINE POLLUTION BULLETIN
 |
| 出版日期 | 2024 |
| 卷号 | 198页码:12 |
| 关键词 | Photophysiological characteristics Phytoplankton Physicochemical parameters Eastern Indian Ocean |
| ISSN号 | 0025-326X |
| DOI | 10.1016/j.marpolbul.2023.115869 |
| 通讯作者 | Sun, Xiaoxia(xsun@qdio.ac.cn) |
| 英文摘要 | Photosynthesis is the most important bioenergy conversion process on Earth. Capturing instantaneous changes in in situ photosynthesis in open ocean ecosystems remains a major challenge. In this study, fast repetition rate fluorometry (FRRF), which can obtain nondestructive, real-time and in situ estimates of photosynthetic param-eters, was used for the first time to continuously observe the spatial variation in in situ photosynthetic parameters in the eastern Indian Ocean (EIO). We further formulated new insights regarding abiotic and biotic factors of potential importance in determining photosynthetic performance. First, we found that the distributions of micro/ nano-and picophytoplankton were opposite under the control of nutrient concentrations. Micro/nano-phytoplankton had higher cell abundances in the nearshore and upwelling regions, while picophytoplankton had higher abundances in the open ocean, and Prochlorococcus was the dominant group. Second, based on the FRRF technology, we obtained the high-precision and high-density vertical profile map of photosynthetic parameters in the euphotic layer. It was observed that values of the maximum photochemical efficiency (Fv/Fm; 0.14-0.55, unitless) and the functional absorption cross-section of PSII (sigma PSII; 1.71-4.90 nm2 RCII-1) increased with increasing depth, while high values of the photosynthetic electron transfer rates (ETRRCII; 0.0019-17.0292 mol e- mol RCII-1 s- 1) and the nonphotochemical quenching (NPQNSV; 0.35-7.26, unitless) occurred in the shallow 50 m layer, and the values decreased as the depth increased. Finally, we discussed limiting factors that regulated the distribution of photosynthetic parameters and concluded that optical properties varied significantly with changes in the ocean physico-chemical parameters and taxonomic composition of phytoplankton assemblages in the EIO. Picophytoplankton (especially cyanobacteria), rather than the micro/nanophytoplankton community, was the dominant factor influencing photosynthesis. Among abiotic factors, photosynthetically active radiation (PAR) was the proximal limiting factor affecting photosynthetic efficiency, followed by temperature and dis-solved inorganic nitrogen (DIN). Consequently, phytoplankton photosynthetic parameters exhibited great vari-ability, allowing rapid responses to environmental condition changes. In this study, we established the basis for detecting future changes in primary production in this oligotrophic area. |
| WOS关键词 | REPETITION RATE FLUOROMETRY ; CHLOROPHYLL FLUORESCENCE ; ELECTRON REQUIREMENT ; CARBON FIXATION ; NITROGEN LIMITATION ; TEMPERATURE ; LIGHT ; SIZE ; PARAMETERS ; FLOW |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; National Natural Science Foundation of China[32371619] ; International Science Partnership Program of the Chinese Academy of Sciences[133137KYSB20200002] ; International Science Partnership Program of the Chinese Academy of Sciences[121311KYSB20190029] ; Taishan Scholars Project[NORC2021-10] ; NSFC Ship time Sharing Project[42049910] |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:001134069300001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/199650]  |
| 专题 | 海洋研究所_胶州湾海洋生态系统国家野外研究站 |
| 通讯作者 | Sun, Xiaoxia |
| 作者单位 | 1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, 7 Nanhai Rd, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Feng,Guo, Shujin,Liang, Junhua,et al. In situ phytoplankton photosynthetic characteristics and their controlling factors in the eastern Indian Ocean[J]. MARINE POLLUTION BULLETIN,2024,198:12. |
| APA | Wang, Feng,Guo, Shujin,Liang, Junhua,&Sun, Xiaoxia.(2024).In situ phytoplankton photosynthetic characteristics and their controlling factors in the eastern Indian Ocean.MARINE POLLUTION BULLETIN,198,12. |
| MLA | Wang, Feng,et al."In situ phytoplankton photosynthetic characteristics and their controlling factors in the eastern Indian Ocean".MARINE POLLUTION BULLETIN 198(2024):12. |
入库方式： OAI收割
来源：海洋研究所
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