文献类型：期刊文献

英文题名：Isotopic evidence for the shift of nitrate sources and active biological transformation on the western coast of Guangdong Province, South China

作者：Lao, Qibin[1,2,3];Chen, Fajin[1,3];Liu, Guoqiang[2];Chen, Chunqing[1,3];Jin, Guangzhe[1,3];Zhu, Qingmei[1,3];Wei, Chunlei[2];Zhang, Chunhua[2]

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

年份：2019

卷号：142

起止页码：603

外文期刊名：MARINE POLLUTION BULLETIN

收录：SCI-EXPANDED(收录号：WOS:000474319500072)、、EI(收录号：20191606800267)、Scopus(收录号：2-s2.0-85064277345)、WOS

基金：We would like to thank Professors Jie Xu and Zhen Shi for their support in collecting water samples. This work was supported by China National Key Research and Development Plan Project (2016YFC1401403); National Natural Science Foundation of China (41476066, 41466010, 41676008); Guangdong Natural Science Foundation of China (2016A030312004); International Science and Technology Cooperation Programme (GASI-IPOVAI-04); and Project of Enhancing School with Innovation of Guangdong Ocean University (GDOU2016050260).

语种：英文

外文关键词：Nitrate; Dual isotope; Bayesian isotope mixing model; Western coast of Guangdong Province

外文摘要：Dual isotope nitrate (NO3-) analysis was performed on the western coast of Guangdong Province to investigate seasonal changes in the main nitrate sources and their biogeochemical processing, which are due to the rapid development of the local economy. In the nearshore area, significant seasonal variations of nitrate sources occurred. The dominant nitrate sources, originating from manure and sewage, suggested that the nitrate along the west coast of Guangdong Province was mainly influenced by local cities despite the westward flow of diluted Pearl River water. In the offshore area, the nitrate loss in the upper and mid water during both two seasons mainly caused by phytoplankton assimilation, whereas coupled nitrification-denitrification could be responsible for the nitrate loss in the bottom waters during summer. Our results suggest that, with the rapid development of local economy, the nitrate sources in the coastal area have shifted to manure and sewage from the local cities.