Bacteriochlorophyll reveals estuarine hypoxia and anoxygenic photosynthetic carbon fixation
文献类型：期刊论文
| 作者 | Kan, Jiawei2,3,4,6; Duan, Liqin2,3,4,6; Song, Jinming2,3,4,6; Yin, Meiling1,2,6; Li, Xuegang2,3,4,6; Liu, Xiaoqi2,3,4,6; Yuan, Huamao2,3,4,6; Wang, Yingxia5,6 |
| 刊名 | LIMNOLOGY AND OCEANOGRAPHY
 |
| 出版日期 | 2025-09-02 |
| 页码 | 13 |
| ISSN号 | 0024-3590 |
| DOI | 10.1002/lno.70203 |
| 通讯作者 | Duan, Liqin(duanliqin@qdio.ac.cn) |
| 英文摘要 | Bacteriochlorophylls (Bchls) are photosynthetic pigments produced by aerobic anoxygenic photosynthetic bacteria and anoxygenic photosynthetic bacteria. However, the sources, degradation, and influence of redox conditions in marine environments remain unclear. This study investigated the distribution of Bchls in the Changjiang Estuary to evaluate their origins, degradation, and environmental response. Results showed that total bacteriochlorophylls a (TBchla), including bacteriochlorophyll a (Bchl a) and its degradation product bacteriopheophytin a (Bphe a), were higher in surface waters than in bottom waters in the inner estuary, where microbial evidence (Sphingomonadaceae) identified aerobic anoxygenic photosynthetic bacteria as the dominant source of TBchla. In contrast, the outer estuary exhibited elevated TBchla in bottom waters, with purple sulfur bacteria (Chromatiaceae and Ectothiorhodospiraceae) as the primary contributors. Significant negative correlations between Bphe a concentrations in bottom seawaters and surface sediments and the dissolved oxygen levels in bottom waters, along with a positive correlation between Bphe a in the surface sediments and the salinity difference between bottom and surface seawaters (Delta S), suggest that Bphe a may serve as a useful indicator of hypoxia and water stratification. The contribution of anoxygenic photosynthetic bacteria to carbon fixation is expected to increase notably, potentially reaching 16% of phytoplankton carbon fixation after 100 years under expanding hypoxia. These findings establish Bchls as reliable indicators of hypoxia and water stratification and provide a framework for reevaluating carbon fixation in global hypoxic coastal systems. |
| WOS关键词 | PHOTOTROPHIC BACTERIA ; SULFUR BACTERIA ; CHLOROPHYLL-A ; CHANGJIANG ESTUARY ; ORGANIC-MATTER ; DIVERSITY ; LAKES ; DEGRADATION ; COMMUNITY ; PIGMENTS |
| 资助项目 | Laoshan Laboratory Science and Technology Innovation Project |
| WOS研究方向 | Marine & Freshwater Biology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001561637300001 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203260]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 通讯作者 | Duan, Liqin |
| 作者单位 | 1.China Geol Survey, Yantai Ctr Coastal Zone Geol Survey, Yantai, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Publ Technol Serv Ctr, Qingdao, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kan, Jiawei,Duan, Liqin,Song, Jinming,et al. Bacteriochlorophyll reveals estuarine hypoxia and anoxygenic photosynthetic carbon fixation[J]. LIMNOLOGY AND OCEANOGRAPHY,2025:13. |
| APA | Kan, Jiawei.,Duan, Liqin.,Song, Jinming.,Yin, Meiling.,Li, Xuegang.,...&Wang, Yingxia.(2025).Bacteriochlorophyll reveals estuarine hypoxia and anoxygenic photosynthetic carbon fixation.LIMNOLOGY AND OCEANOGRAPHY,13. |
| MLA | Kan, Jiawei,et al."Bacteriochlorophyll reveals estuarine hypoxia and anoxygenic photosynthetic carbon fixation".LIMNOLOGY AND OCEANOGRAPHY (2025):13. |
入库方式： OAI收割
来源：海洋研究所
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