文献类型：期刊文献

英文题名：Tide drives nutrients variation and exchange flux in the semi-enclosed Shuidong Bay coastal water in winter, South China Sea

作者：Fu, Miaojian[1];Lin, Jielin[1];Zhang, Peng[1,2];Luo, Weisheng[1];Zhang, Jibiao[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Res Ctr Coastal Environm Protect & Ecol Resilience, Zhanjiang 524088, Guangdong, Peoples R China

年份：2023

卷号：242

外文期刊名：OCEAN & COASTAL MANAGEMENT

收录：SCI-EXPANDED(收录号：WOS:001025751600001)、、EI(收录号：20232514268496)、Scopus(收录号：2-s2.0-85162168387)、WOS

基金：The authors are grateful for the anonymous reviewers' careful review and valuable suggestions to improve the manuscript. We gratefully acknowledge supported by Research and Development Projects in Key Areas of Guangdong Province (2020B1111020004) ; Guangdong Basic and Applied Basic Research Foundation (2023A1515012769) ; Guang-dong Basic and Applied Basic Research Foundation (2020A1515110483) ; Research on hydrodynamic changes and envi-ronmental remediation plan of Gemei Sea dike diversion (B21137) ; Guangdong Ocean University Fund Project (R18021) ; Science and Technology Special Project of Zhanjiang City (2019B01081) .

语种：英文

外文关键词：Tidal variation; Nutrient; Composition; Exchange flux; Coastal water

外文摘要：Nutrients play a key role in coastal ecosystems. Coastal tide is an important driver of the daily nutrient variability in semi-enclosed bay under the intensive human activities and climate change. However, the extent of tidal effects on the nutrients variation and exchange flux in the semi-enclosed bay in winter is still scarcely. In this study, seawater samples were collected by synchronous continuous observation during winter in 2021, to investigate tide drives nutrients variation and exchange flux between Shuidong Bay (SDB) and South China Sea (SCS). The results showed most nutrients were significantly impacted by the tidal variation in the SDB with the semi-diurnal cycle. Coastal flood water can increase seawater exchange capacity due to strong dilution influenced by the outer SCS water, resulting mitigate adverse effects of nutrient enrichment in the semi-enclosed bay. In addition, the concentrations of total dissolved nitrogen (TDN), total dissolved phosphorus (TDP), and silicate (DSi) were 146.75 & mu;mol/L, 1.06 & mu;mol/L, and 6.15 & mu;mol/L. Besides, there was a relative excess of nitrogen, phosphorus and silicate were limiting factors in the SDB, and nutrients significantly impacted the Chlorophyll-a in coastal water. Moreover, both TDP and DSi were transported from the SDB to the SCS with a net exchange flux of 0.23 t and 1.99 t, while TDN was transported from the SCS to the SDB with a net exchange flux of 0.14 t, resulting in nutrients ratio increase in the SDB coastal water. Statistical analysis identified the tide induced hydrological variations and terrestrial inputs dominated nutrient dynamics in the SDB coastal water. This study provided a new understanding of the variation and transport of nutrients driven by tide in the SDB, which is implications for understanding the biogeochemistry of nutrients in daily scale and water quality management in the semi-enclosed bay in future.