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Isotopic Composition Reveals the Impact of Oyster Aquaculture on Pelagic Nitrogen Cycling in a Subtropical Estuary

文献类型：期刊论文

作者Jiang, Hao4,5; Lan, Wenlu2,3; Li, Tianshen2; Xu, Zhifang1; Liu, Wenjing1; Pan, Ke5
刊名WATER RESEARCH
出版日期2020-12-15
卷号187页码:9
关键词Nitrogen Sources Transformations Isotope mixing model Oyster
ISSN号0043-1354
DOI10.1016/j.watres.2020.116431
英文摘要To offset estuarine eutrophication, interest is increasing in restoring oyster reefs and expanding oyster aquaculture. However, ecosystem-scale evidence is lacking on oyster assemblages' impacts on estuarine pelagic nitrogen (N) cycling. Using a multiple-isotope approach and isotope-mixing model, we examined the sources, transformations, and influence of intensive oyster aquaculture on N pollution in a subtropical estuary. The salinity-dependent NO3- and NH4+ concentrations and their correlations with isotopic signals (delta N-15-NO3-, delta O-18-NO3-, delta N-15-NH4+) indicated the nutrient spatial distribution in low-salinity areas was largely regulated by mixing between freshwater and seawater. However, the intensive oyster aquaculture greatly increased nitrification in the estuary. In high-salinity areas where oyster assemblages were absent, the assimilation of NO3- by phytoplankton became dominant and sharply increased the delta N-15-NO3- and delta O-18-NO3-. Soil organic nitrogen and fertilizer, domestic sewage, and wastewater treatment plants were the major NO3- sources in the estuary, while internal nitrification contributed 20.6% to the NO3- pool. Oyster biodeposits comprised up to one-third of the particulate organic matter in the water column, and as much as 47.3% of the NH4+ pool could be from the oysters. Our study shows that oysters significantly contribute to the pelagic nutrient pools and N transformations, adding an important dimension to our understanding of oyster assemblages' impacts on estuarine N cycling. (c) 2020 Elsevier Ltd. All rights reserved.
WOS关键词CHESAPEAKE BAY ; SHELLFISH AQUACULTURE ; CRASSOSTREA-VIRGINICA ; MERCENARIA-MERCENARIA ; RIVER ESTUARY ; NITRATE ; EUTROPHICATION ; MARINE ; BIODEPOSITION ; DYNAMICS
资助项目National Natural Science Foundation of China[41676095] ; Science and Technology Project of Guangxi[GuikeAB18126075] ; Science and Technology Project of Guangxi[GuikeAA17129001] ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization[GKLMC-201901]
WOS研究方向Engineering ; Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:000589970200003
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Guangxi ; Science and Technology Project of Guangxi ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization ; Open Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization
源URL[http://ir.iggcas.ac.cn/handle/132A11/98741]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Pan, Ke
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Marine Environm Monitoring Ctr Guangxi, Beihai 536000, Peoples R China
3.Guangxi Acad Sci, Guangxi Mangrove Res Ctr, Guangxi Key Lab Mangrove Conservat & Utilizat, Beihai 536000, Peoples R China
4.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
5.Shenzhen Univ, Inst Adv Study, Shenzhen Key Lab Marine Microbiome Engn, Shenzhen 518060, Peoples R China
推荐引用方式
GB/T 7714		 Jiang, Hao,Lan, Wenlu,Li, Tianshen,et al. Isotopic Composition Reveals the Impact of Oyster Aquaculture on Pelagic Nitrogen Cycling in a Subtropical Estuary[J]. WATER RESEARCH,2020,187:9.
APA Jiang, Hao,Lan, Wenlu,Li, Tianshen,Xu, Zhifang,Liu, Wenjing,&Pan, Ke.(2020).Isotopic Composition Reveals the Impact of Oyster Aquaculture on Pelagic Nitrogen Cycling in a Subtropical Estuary.WATER RESEARCH,187,9.
MLA Jiang, Hao,et al."Isotopic Composition Reveals the Impact of Oyster Aquaculture on Pelagic Nitrogen Cycling in a Subtropical Estuary".WATER RESEARCH 187(2020):9.

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来源：地质与地球物理研究所

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