文献类型：期刊文献

英文题名：Seasonal phosphorus variation in coastal water affected by the land-based sources input in the eutrophic Zhanjiang Bay, China

作者：Zhang, Jibiao[1];Zhang, Yanchan[1];Zhang, Peng[1];Li, Yi[1];Li, Jianxu[1];Luo, Xinqi[1];Xu, Jialei[1];Zhao, Lirong[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Guangdong, Peoples R China

年份：2021

卷号：252

外文期刊名：ESTUARINE COASTAL AND SHELF SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000684008000017)、、Scopus(收录号：2-s2.0-85101395981)、WOS

基金：The authors are grateful for the anonymous reviewers' careful review and valuable suggestions to improve the manuscript. This research was financially supported by Research and Development Projects in Key Areas of Guangdong Province (2020B1111020004); Guangdong Basic and Applied Basic Research Foundation (2020A1515110483); Guangdong Ocean University Fund Project (R18021); the Science and Technology Special Project of Zhanjiang City (2019B01081; 2019B01009); First-class Special Fund (231419018); Innovation Strong School Project (230420021) of Guangdong Ocean University.

语种：英文

外文关键词：Total dissolved phosphorus; Speciation; Spatiotemporal variation; Land-based sources input; Zhanjiang bay

外文摘要：Phosphorus (P), a significant biogenic element, plays a key role in the primary productivity of estuarine and coastal ecosystems. The study determined that the seasonal dynamics of total dissolved P (TDP)in the coastal area of the Zhanjiang Bay (ZJB) were largely affected by land-based sources. The TDP concentration had significant seasonal variations in the ZJB (P < 0.01), and the annual mean TDP concentration was 3.30 +/- 1.12 mu mol L-1 in the coastal waters and 30.37 +/- 55.07 mu mol L-1 in the estuaries and sewage outlets. The spatial distribution of TDP demonstrated a decreasing trend from the top to the mouth of the ZJB. In the TDP composition, dissolved inorganic P (DIP) was the major fraction of the TDP in land-based sources and seawater. Moreover, the ZJB is annually subjected to a load of 3848.07 tons TDP through the land-based input sources, accounting for 10.4%, 37.0% and 52.6% in the dry, normal, and wet seasons, respectively. Most of the monitoring stations in ZJB coastal water did not meet the Grade IV national water quality standard. Both the coastal water and land-based water sources were seriously polluted by P. This study revealed that land-based source inputs played a key role in the P biogeochemistry process in the ZJB. A land-ocean integrated P pollution control strategy should be effectively implemented for water quality improvement and eutrophication mitigation in the ZJB.