Environmental Drivers and Trophic Transfer of Domoic Acid in a Eutrophic Subtropical Estuary: Linking Toxigenic Pseudonitzschia Dynamics to Ecosystem Risks
文献类型：期刊论文
| 作者 | Liu, Yang7,8; Niu, Biaobiao1; Zhang, Ting7,8; Wang, Jinxiu6; Lin, Xianzhi7,8; Zhu, Lingxiang7,8; Lv, Jinjin7,8; Yu, Rencheng6; Li, Xiaodong5; Zhu, Jingyi4 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2026-03-10 |
| 卷号 | 60期号:9页码:7011-7025 |
| 关键词 | domoic acid
phytoplankton classification
|
| ISSN号 | 0013-936X |
| DOI | 10.1021/acs.est.6c00346 |
| 通讯作者 | Chan, Lai Leo(leochan@cityu.edu.hk) ; Li, Yang(liyang@scnu.edu.cn) ; Zhang, Li(zhangli@scsio.ac.cn) |
| 英文摘要 | Domoic acid (DA), a neurotoxin produced by certain diatoms of Pseudonitzschia, poses significant risks to marine ecosystems and human health, yet its dynamics in subtropical eutrophic estuaries remain poorly understood. This study investigates DA production and trophic transfer in the Pearl River Estuary, combining chemotaxonomy, morphological identification, ITS1 metabarcoding, and HPLC-MS/MS analysis. We revealed strong seasonal and spatial heterogeneity in Pseudonitzschia assemblages, identifying Pseudonitzschia cuspidata Clade III as a dominant DA producer with an estimated in situ cellular quota of 0.1-0.8 pg cell-1 for the community. DA was ubiquitously detected across trophic levels, with summer maxima in phytoplankton to zooplankton, crustaceans, and mollusks, exceeding safety thresholds with 24.1 mg kg-1 in scallops. Baseline DA contamination persisted year-round, with this chronic risk amplified by increased summer diatom biomass. Crucially, DA production was governed by optimal salinity and temperature and linked to nutrient stoichiometry rather than absolute nutrient concentration; chronic high nutrient levels showed a negative correlation with DA production. These environmental drivers also influenced DA transfer efficiency, with summer conditions amplifying contamination despite sub-bloom cell densities. These findings reveal underestimated risks in subtropical estuaries, providing a critical framework for monitoring and managing DA contamination under climate variability. |
| WOS关键词 | PSEUDO-NITZSCHIA BACILLARIOPHYCEAE ; MONTEREY BAY ; DIATOM ; PHYTOPLANKTON ; BLOOM ; INDUCTION ; DIVERSITY ; PHOSPHATE ; SHELLFISH ; TOXICITY |
| 资助项目 | Science and Technology Planning Project of Guangdong Province[2023B1212060047] ; Special Foundation for National Science and Technology Basic Research Program of China[2025FY01400] ; Research Grants Council, University Grants Committee[CityU11104821] ; Science and Technology Planning Project of Guangzhou[202201010198] ; Basic and Applied Basic Research Foundation of Guangdong Province[2023A04J0198] ; South China Sea Institute of Oceanology, Chinese Academy of Sciences[SCSIO2023QY04] ; National Natural Science Foundation of China[41806143] ; Natural Science Foundation of Guangdong Province[2021A1515012533] ; Natural Science Foundation of Hainan Province[423CXTD392] ; National Key Research and Development Program of China[2022-20] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001697600100001 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204820]  |
| 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 | Chan, Lai Leo; Li, Yang; Zhang, Li |
| 作者单位 | 1.South China Normal Univ, Coll Life Sci, Guangzhou Key Lab Subtrop Biodivers & Biomonitorin, Guangzhou 510631, Peoples R China 2.Hong Kong Polytech Univ, Dept Hlth Technol & Informat, Kowloon, Hong Kong 999077, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong 999077, Peoples R China 4.City Univ Hong Kong, State Key Lab Marine Environm Hlth, Kowloon Tong, Hong Kong 999077, Peoples R China 5.Fujian Agr & Forestry Univ, Coll Oceanol, State Key Lab Mariculture Breeding, Key Lab Marine Biotechnol Fujian Prov, Fuzhou 350002, Fujian, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 7.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Peoples R China 8.Sanya Inst Ocean Ecoenvironm Engn, Key Lab Trop Marine Biotechnol Hainan Prov, Sanya 572000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yang,Niu, Biaobiao,Zhang, Ting,et al. Environmental Drivers and Trophic Transfer of Domoic Acid in a Eutrophic Subtropical Estuary: Linking Toxigenic Pseudonitzschia Dynamics to Ecosystem Risks[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2026,60(9):7011-7025. |
| APA | Liu, Yang.,Niu, Biaobiao.,Zhang, Ting.,Wang, Jinxiu.,Lin, Xianzhi.,...&Zhang, Li.(2026).Environmental Drivers and Trophic Transfer of Domoic Acid in a Eutrophic Subtropical Estuary: Linking Toxigenic Pseudonitzschia Dynamics to Ecosystem Risks.ENVIRONMENTAL SCIENCE & TECHNOLOGY,60(9),7011-7025. |
| MLA | Liu, Yang,et al."Environmental Drivers and Trophic Transfer of Domoic Acid in a Eutrophic Subtropical Estuary: Linking Toxigenic Pseudonitzschia Dynamics to Ecosystem Risks".ENVIRONMENTAL SCIENCE & TECHNOLOGY 60.9(2026):7011-7025. |
入库方式： OAI收割
来源：海洋研究所
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