文献类型：期刊文献

英文题名：Spatial-Monthly Variations and Influencing Factors of Dissolved Oxygen in Surface Water of Zhanjiang Bay, China

作者：Zhou, Fengxia[1,2];Lu, Xuan[1,2];Chen, Fajin[1,2];Zhu, Qingmei[1,2];Meng, Yafei[1,2];Chen, Chunqing[1,2];Lao, Qibin[3];Zhang, Shuwen[4]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China;[3]State Ocean Adm, Marine Environm Monitoring Ctr Beihai, Beihai 536000, Peoples R China;[4]Shantou Univ, Inst Marine Sci, Shantou 515063, Peoples R China

年份：2020

卷号：8

期号：6

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000553876000001)、、Scopus(收录号：2-s2.0-85087445057)、WOS

基金：This research was co-supported by the Foundation for Young Talents in General Colleges and Universities of Guangdong Province (2019KQNCX044), the National Key Research and Development Plan (2016YFC1401403), the International Science and Technology Cooperation Project (GASI-IPOVAI-04), the Natural Science Foundation of Guangdong Province (2016A030312004 and 2016A030313754), the Project of Enhancing School with Innovation of Guangdong Ocean University (GDOU2016050260), and the Program for Scientific Research Start-up Funds of Guangdong Ocean University (R17058).

语种：英文

外文关键词：dissolved oxygen; anthropogenic influences; seasonal variations; Zhanjiang Bay

外文摘要：Dissolved oxygen (DO) is one of the most important factors for maintaining a healthy marine ecosystem. The information of DO in large estuaries or bays with large entrances has been widely studied, while it is relatively limited for a bay with a narrow entrance which is vulnerable to human activities. The Zhanjiang Bay, located in the northwestern South China Sea, has a very narrow entrance and suffers from strong anthropogenic activities and obvious seasonal variations in environmental parameters. In this study, we analyzed the spatial and monthly variations of DO, apparent oxygen utilization (AOU), percent oxygen saturation (DO-saturation), and related environmental parameters in the surface water of Zhanjiang Bay to find out the factors controlling the dynamics of DO. Different from many other coastal ecosystems, DO concentrations in the Zhanjiang Bay reached minimum values in late spring and early autumn. The phytoplankton bloom in summer months, which was related to the high concentrations of nutrients brought by rainfall-induced terrestrial inputs, contributed to that phenomenon. Though high chlorophyll a (Chla) concentrations were observed in both the summer months and December, the DO-saturation values were relatively low and AOU values were relatively high in summer months. Rainfall-induced terrestrial discharge in summer months, which had high concentrations of chemical oxygen demand, contributed much to that phenomenon. The average DO concentrations and DO-saturation values in a hydrological year decreased seaward, and AOU values increased seaward, indicating the anthropogenic influence from terrestrial input. The highest annual average Chlaconcentration, relatively high annual average DO-saturation value and relatively low annual AOU value were observed near the Donghai Dam. This indicated that the construction of Donghai Dam has significant influences on the environment of Zhanjiang Bay.