气候变化领域集成服务门户(CCPortal): Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary; Southeast China

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DOI	10.1016/j.marpolbul.2020.111696
	Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary; Southeast China
	Li X.; Qian W.; Hou L.; Liu M.; Chen Z.; Tong C.
发表日期	2020
ISSN	0025326X
卷号	160
英文摘要	Quality and source of soil organic carbon controlling DNRA in estuarine wetlands have not been well understood. We used a 15N isotopic tracer approach to investigate DNRA rates and determined the effects of organic carbon quality and source on magnitudes and distribution of DNRA along a freshwater-oligohaline gradient of Min River estuary, Southeast China. DNRA rates ranged from 0.45 to 2.92 nmol g−1 h−1 and were significantly higher in summer than in winter. DNRA was well predicted by dissolved organic carbon (DOC), organic carbon isotope (δ13Corg), total OC as the main predictor variables, which explained 63%, 6.0% and 7.0% of DNRA variances, respectively. Water content and temperature were crucial for DOC availability with important implications on DNRA. Soil δ13Corg increased from freshwater to oligohaline wetlands and showed a positive correlation with DNRA. We therefore conclude that high DOC availability enhances DNRA and can best predict spatial distribution in subtropical estuary. © 2020 Elsevier Ltd
英文关键词	Carbon isotope; DNRA; Intertidal wetlands; Organic carbon quality; Subtropical estuary
语种	英语
scopus关键词	Estuaries; Isotopes; Quality control; Soils; Tracers; Water; Wetlands; Dissimilatory nitrate reduction; Dissolved organic carbon; Estuarine wetlands; Positive correlations; Predictor variables; Soil organic carbon; Sub-tropical estuary; Organic carbon; ammonia; carbon 13; fresh water; nitrate; nitrogen 15; organic carbon; ammonium; carbon isotope; dissolved organic carbon; environmental gradient; freshwater; intertidal environment; nitrate; organic carbon; reduction; soil organic matter; water content; water temperature; wetland; Article; China; correlational study; environmental temperature; estuary; nonhuman; prediction; reduction (chemistry); summer; water content; wetland; winter; China; Fujian; Minjiang Estuary
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148519
作者单位	Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, 350007, China; School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China; Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 200241, China
推荐引用方式 GB/T 7714	Li X.,Qian W.,Hou L.,et al. Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary; Southeast China[J],2020,160.
APA	Li X.,Qian W.,Hou L.,Liu M.,Chen Z.,&Tong C..(2020).Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary; Southeast China.Marine Pollution Bulletin,160.
MLA	Li X.,et al."Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary; Southeast China".Marine Pollution Bulletin 160(2020).