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Bulletin of Chinese Academy of Sciences (Chinese Version)

Dejuan JIANG, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Key Laboratory of Estuarine and Coastal Environment, Ministry of Ecology and Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, ChinaFollow
Song QIN, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Zhengyi LIU, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Ruiteng SUN, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; School of Surveying and Geo-Informatics, Shandong Jianzhu University, Jinan 250101, China
Xiaoshuai HANG, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
Tao ZOU, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Xiaoguang LI, Key Laboratory of Estuarine and Coastal Environment, Ministry of Ecology and Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, China
Lijuan LI, CAS Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Shichao TIAN, Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot 010010, China
Yanfang LI, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Yongming LUO, State Key Laboratory of Soil & Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, China
Chuanyuan WANG, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Yuan LI, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, ChinaFollow

Keywords

inorganic nitrogen, phosphate, nitrogen-to-phosphorus ratio (N/P), criterion, Yellow River estuary

Document Type

Strategy on China's Coastal Zone Ecological Barrier Construction

Abstract

Estuaries, as ecologically sensitive brackish water mixing zones, face a critical bottleneck in refined management because traditional zonation based on socioeconomic attributes overlooks the ecological heterogeneity driven by salinity gradients and nutrient stoichiometry, leading to a disconnect between management measures and conservation needs. This study proposes a novel approach to coastal zonation using nitrogen and phosphorus nutrient criteria as an ecological benchmark. Overall ecological criteria are established for the Yellow River estuary (dissolved inorganic nitrogen: 0.258 mg/L; phosphate: 0.015 mg/L) and a differentiated management scheme is constructed based on a salinity gradient (26.5 PSU boundary). It is recommended to integrate these nutrient criteria into existing functional zonation to form a new standard with dual functional-ecological constraints; to establish a dynamic feedback and early-warning mechanism for a transition from static to adaptive management; and to regulate the riverine N/P ratio through a land-sea coordinated approach that includes optimizing water-sediment discharge and restoring coastal wetlands. This framework is expected to provide a scientific basis for the sea-to-land governance strategy, enabling the scientific assessment of watershed nutrient management effectiveness, and supporting the scientific delineation of estuarine-type coastal zones based on the principle of “defining boundaries by function”.

First page

2138

Last Page

2150

Language

Chinese

Publisher

Bulletin of Chinese Academy of Sciences

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