气候变化领域集成服务门户(CCPortal): Spatiotemporal nutrient patterns, composition, and implications for eutrophication mitigation in the Pearl River Estuary, China

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DOI	10.1016/j.ecss.2022.107749
	Spatiotemporal nutrient patterns, composition, and implications for eutrophication mitigation in the Pearl River Estuary, China
	Ke, Sheng; Zhang, Peng; Ou, Shujun; Zhang, Junxiao; Chen, Jiyu; Zhang, Jibiao
发表日期	2022
ISSN	0272-7714
EISSN	1096-0015
卷号	266
英文摘要	Human activities and climate change have changed large river estuary ecosystems, which impacts nutrient enrichment in coastal waters. Enhanced nutrient levels lead to eutrophication, oxygen deficits, and frequent occurrences of harmful algal blooms. In this study, the spatiotemporal nutrient patterns and composition of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP), as well as the relationships between DIN, DIP, eutrophication index (EI), and environmental factors were explored. The spatiotemporal pattern and composition of DIN and DIP in coastal water based on samples from fifteen stations in the Pearl River Estuary (PRE) were investigated during the dry (April), wet (July), and normal (October) seasons in 2018. The results showed that the average concentrations of DIN and DIP were 65.35 +/- 47.72 mu mol L-1 and 0.94 +/- 0.70 mu mol L-1 in the PRE, respectively. The concentration of DIN at most monitoring stations failed to reach the Grade IV national seawater quality standard, while the concentration of DIP did meet them. The ratio of DIN/DIP ranged from 4.33 to 242.50, with an average of 42.60 +/- 47.06, exceeding the Redfield ratio. EI was high in the PRE, ranging from 0.01 to 67.19, with an average of 8.64 +/- 11.94. Hotspots with high DIN and DIP concentrations were located in the upper PRE during all seasons. In addition, there were significant negative correlations among DIN, DIP, EI, and salinity (P < 0.05), except for DIP and EI in the wet water flow period, implying an impact from riverine nutrient input. Moreover, the DIN, DIP, and EI also had negative relationships with dissolved oxygen in all seasons (P < 0.05), indicating that eutrophication led to oxygen deficits in the PRE. Therefore, land-ocean integration management of PRE-associated nutrient criteria, composition, and sources should be introduced to effectively and efficiently mitigate eutrophication in the future.
英文关键词	Spatiotemporal pattern; Nutrients; Pollution assessment; Eutrophication; Pearl river estuary
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000789673200003
来源期刊	ESTUARINE COASTAL AND SHELF SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280967
作者单位	Guangdong Ocean University; Guangdong Ocean University; Ministry of Natural Resources of the People's Republic of China
推荐引用方式 GB/T 7714	Ke, Sheng,Zhang, Peng,Ou, Shujun,et al. Spatiotemporal nutrient patterns, composition, and implications for eutrophication mitigation in the Pearl River Estuary, China[J],2022,266.
APA	Ke, Sheng,Zhang, Peng,Ou, Shujun,Zhang, Junxiao,Chen, Jiyu,&Zhang, Jibiao.(2022).Spatiotemporal nutrient patterns, composition, and implications for eutrophication mitigation in the Pearl River Estuary, China.ESTUARINE COASTAL AND SHELF SCIENCE,266.
MLA	Ke, Sheng,et al."Spatiotemporal nutrient patterns, composition, and implications for eutrophication mitigation in the Pearl River Estuary, China".ESTUARINE COASTAL AND SHELF SCIENCE 266(2022).