文献类型：期刊文献

英文题名：Analysis of Dissolved Oxygen and Nutrients in Zhanjiang Bay and the Adjacent Sea Area in Spring

作者：Fu, Dongyang[1];Zhong, Yafeng[1];Chen, Fajin[2];Yu, Guo[1];Zhang, Xiaolong[1]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China

年份：2020

卷号：12

期号：3

外文期刊名：SUSTAINABILITY

收录：SSCI(收录号：WOS:000519135102045)、SCI-EXPANDED(收录号：WOS:000519135102045)、、Scopus(收录号：2-s2.0-85081253153)、WOS

基金：This research was supported by the Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang; Zhanjiang Bay Laboratory), China, grant number ZJW-2019-08; The High-level University Construction Project, China, grant number 002026002009; The Science and Technology Planning Project of Guangdong Province, grant number 2016A020222016; The Natural Science Foundation of Guangdong Province, grant number 2016A030312004.

语种：英文

外文关键词：Dissolved Oxygen; Nutrients; Zhanjiang Bay

外文摘要：As a semi-closed bay with narrow bay mouths, the distribution of nutrients in Zhanjiang Bay was different from bays with open bay mouths and rivers with large flows. It is important to study the water quality of Zhanjiang Bay to determine the impact of human activities on this semi-closed bay. Based on field survey data in spring, the spatial distribution of nutrients and other physico-chemical parameters was investigated, in order to study the geochemical characteristics of nutrients in semi-closed bays. Higher nutrient concentrations were observed in the inner and outer bays, but lower concentrations were observed at the bay mouth. With other analyses of physico-chemical parameters, the higher nutrient concentrations in the inner bay originated mainly from the diluted freshwater input from local developments and rivers. With the strong flow that exists along the western coast of Guangdong Province, the higher dissolved inorganic nitrogen (DIN) and SiO3-Si concentrations along the outer bay may be influenced by discharge from local cities in western Guangdong Province. There was stronger phytoplankton assimilation at the bay mouth, which resulted in reduced nutrient concentrations in this area. Although the hydrographic characteristics between the inner bay and outer bay were significantly different, the distribution of chlorophyll-a (Chla) levels was similar. However, we found significantly low dissolved oxygen (DO) and high apparent oxygen utilisation (AOU) consumption levels in the inner bay, and high DO and low AOU levels in the outer bay, which suggested that decomposition was more important than photosynthesis in the closed bay, even in spring during the phytoplankton bloom.