文献类型：期刊文献

英文题名：Regulation of winter river input on the nutrient structure of typical tropical bays around Leizhou Peninsula, South China

作者：Zheng, Qiwen[1,3,4];Pan, Gang[5];Zhao, Hui[1,2,3,4];Tian, Kai[1,3,4]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang, Guangdong, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China;[3]Guangdong Ocean Univ, Res Ctr Coastal Environm Protect & Ecol Resilience, Zhanjiang, Peoples R China;[4]Guangdong Ocean Univ, Cooperat Res Ctr Nearshore Marine Environm Change, Zhanjiang, Peoples R China;[5]York St John Univ, Sch Humanities, York YO31 7EX, N Yorkshire, England

年份：2024

卷号：256

外文期刊名：OCEAN & COASTAL MANAGEMENT

收录：SCI-EXPANDED(收录号：WOS:001269134500001)、、EI(收录号：20242916701422)、Scopus(收录号：2-s2.0-85198291600)、WOS

基金：The present research is supported by the National Natural Science Foundation of China, China (No. 42076162) ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory, China (Zhuhai) (No. 311020004) .

语种：英文

外文关键词：Tropical bay; Nutrient; River input; Biochemical processes

外文摘要：Elucidating the regulatory mechanisms of terrestrial input on bay nutrients is essential for comprehending the ecological stability of bays. This paper investigates nutrients' structure, transport, and transformation processes in typical tropical bays of the Leizhou Peninsula during river input, utilizing fixed-site observation data from five distinct bay locations during November 2022. The results show that the average concentrations of TN, TP, DIN and DIP in the rivers of Leizhou Peninsula were 5.162 mg L-1 (2.263-13.610 mg L-1), 0.092 mg L-1 (0.026-0.288 mg L-1), 2.195 mg L-1 (0.897-4.081 mg L-1), 0.042 mg L-1 (0.002-0.147 mg L-1). The average concentrations of TN, TP, DIN and DIP in the bay were 0.491 mg L-1 (0.282-0.843 mg L-1), 0.041 mg L-1 (0.018-0.073 mg L-1), 0.245 mg L-1 (0.019-0.614 mg L-1), 0.021 mg L-1 (0.005-0.045 mg L-1). The ratio of TN/TP in the bay averaged 29 (17-48), and the ratio of DIN/DIP averaged 35.1 (8-298). The mean Chl-a concentration in the bay was 7.131 mg L-1 (0.927-25.076 mg L-1). The bays along the Leizhou Peninsula are still heavily influenced by rivers during winter. There are higher concentrations of nutrients in the bays, and there is higher nutrient input flux from rivers. The significant negative correlation between nutrient concentration and salinity in the bay indicates that river input is an important source of nutrients in the bay. As water transports from the river to offshore, the ratio of dissolved inorganic nitrate to dissolved inorganic phosphorus shifts from phosphorus limitation to nitrogen limitation. Leizhou Bay and Jianjiang Bay are heavily influenced by riverine inputs and coastal activities and are potentially at risk of eutrophication. Anpu Bay is subject to both riverine and other sources of inputs but has a better self-purification capacity. The results suggest that nutrient transport in Leizhou Peninsula rivers is regulated by both physical and biogeochemical processes. It is recommended that the monitoring of nutrient discharges from rivers be strengthened, total land-based pollution should be controlled, and industrial structures along the rivers should be adjusted and the control of total land-based pollution, and to adjust the industrial structure along the rivers to reduce the risk of water quality deterioration.