Compositions and spatio-temporal distributions of different nitrogen species and lability of dissolved organic nitrogen from the Dafengjiang River to the Sanniang Bay, China

Dongliang Lu; Zhenjun Kang; Bin Yang; Solomon Felix Dan; Dong Zhang; Peng Zhang; Haifang Huang; Qiuping Zhong

doi:10.1016/j.marpolbul.2020.111205

Compositions and spatio-temporal distributions of different nitrogen species and lability of dissolved organic nitrogen from the Dafengjiang River to the Sanniang Bay, China

Mar Pollut Bull. 2020 Jul:156:111205. doi: 10.1016/j.marpolbul.2020.111205. Epub 2020 May 11.

Authors

Dongliang Lu¹, Zhenjun Kang², Bin Yang³, Solomon Felix Dan⁴, Dong Zhang⁵, Peng Zhang⁶, Haifang Huang¹, Qiuping Zhong¹

Affiliations

¹ Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China.
² Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China; Key Laboratory of Coastal Science and Engineering, Beibu Gulf University, Qinzhou 535011, China.
³ Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China; Key Laboratory of Coastal Science and Engineering, Beibu Gulf University, Qinzhou 535011, China. Electronic address: binyang@bbgu.edu.cn.
⁴ Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China; Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
⁵ School of Marine Sciences, Guangxi University, Nanning 530004, China.
⁶ College of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China.

PMID: 32510363
DOI: 10.1016/j.marpolbul.2020.111205

Abstract

Field investigations and incubation experiment were carried out in the Dafengjiang River (DFJR) and Sanniang Bay (SNB) surface water from September 2017 to July 2018 to study the composition and spatio-temporal distributions of different nitrogen (N) species, lability of dissolved organic N (DON), and contributions of different N species from the DFJR to the dissolved inorganic N (DIN) level in the SNB. The spatio-temporal distributions of different N species exhibited significant seasonal variation (p < 0.05). The average contribution of DIN, DON, and particulate nitrogen (PN) to TN was 31.91%, 46.57%, and 21.52%, respectively. Comparatively being the dominant form of N in the study area, the average lability of DON across the incubation sites D1, D5 and D7 ranged from 72%-79%. DIN, DON, and PN from the DFJR respectively contributed to 55.95%, 7.03%, and 5.63% of water quality in the SNB.

Keywords: DON lability; Dafengjiang River; Nitrogen pollutants; Sanniang Bay; Water quality.

MeSH terms

Bays
China
Environmental Monitoring
Nitrogen / analysis
Rivers*
Water Pollutants, Chemical / analysis*

Substances

Water Pollutants, Chemical
Nitrogen