气候变化领域集成服务门户(CCPortal): Size-based bioavailability of land-based DON and its impact on eutrophication of Jiaozhou bay

CCPortal

DOI	10.1016/j.marpolbul.2020.110898
	Size-based bioavailability of land-based DON and its impact on eutrophication of Jiaozhou bay
	Li M.; Li K.; Chen K.; Liu C.; Ma Y.; Wang X.
发表日期	2020
ISSN	0025326X
卷号	152
英文摘要	With the increase in human activities, dissolved organic nitrogen (DON) has been the major nitrogen pool, which might impact on eutrophication of coastal water. We studied the bioavailability of different molecular size DON from the major sources of agricultural, domestic, industrial, and urban non-point source, respectively, in Jiaozhou bay, China. By clarifying the relationship between the source and molecular size, the bioavailability of terrestrial DON can be further understood based on the aspects of bioavailability proportion (BDON%) and kinetics with the help of ultraviolet radiation. The bioavailability proportion of high molecular size DON (HDON; >1000 Da) was higher than that of low molecular size DON (LDON; <1000 Da), with values of 58.0% to 35.1% for the HDON and values of 47.2% to 29.5% for the LDON, respectively. There were significant differences in the degradation rate constants (p < 0.05), which varied from 0.30 to 0.67 d−1 for HDON and from 0.13 to 0.75 d−1 for LDON. The SUVA254 values were significantly and negatively correlated with the bioavailabilities of DON, which can reflect to some extent the structure and molecular size. In order to study the influences of the different terrestrial DON inputs on the eutrophication of Jiaozhou bay, a modified 3D coupled biogeochemical model was used based on the survey data in August 2012. Two scenarios of DON loads from Haibo river and Dagu river were modeled. The impact on eutrophication of Jiaozhou bay is higher for the agricultural source of DON from Dagu river than for the domestic source from Haibo river. © 2020 Elsevier Ltd
英文关键词	Bioavailability; Dissolved organic nitrogen; Dynamics; Jiaozhou bay; Molecular weight; Water quality model
语种	英语
scopus关键词	Agricultural robots; Agriculture; Biochemistry; Degradation; Dynamics; Molecular weight; Nitrogen; Rate constants; River pollution; Rivers; Water quality; Agricultural sources; Bioavailability; Biogeochemical modeling; Degradation rate constants; Dissolved organic nitrogen; Jiaozhou Bay; Non-point source; Water quality modeling; Eutrophication; dissolved organic nitrogen; organic nitrogen; unclassified drug; nitrogen; bioavailability; dissolved organic nitrogen; eutrophication; molecular analysis; three-dimensional modeling; water quality; agricultural waste; Article; bay; bioavailability; biogeochemistry; chemical structure; China; controlled study; degradation; domestic waste; environmental impact; eutrophication; industrial waste; Jiaozhou bay; molecular size; molecular weight; nonpoint source pollution; quantitative analysis; river; simulation; ultraviolet radiation; urban area; water quality; bioavailability; environmental monitoring; eutrophication; human; China; Dagu River; Haibo River; Jiaozhou Bay; Shandong; Bays; Biological Availability; China; Environmental Monitoring; Eutrophication; Humans; Nitrogen; Ultraviolet Rays
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149206
作者单位	Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qing Dao, 266100, China; Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
推荐引用方式 GB/T 7714	Li M.,Li K.,Chen K.,et al. Size-based bioavailability of land-based DON and its impact on eutrophication of Jiaozhou bay[J],2020,152.
APA	Li M.,Li K.,Chen K.,Liu C.,Ma Y.,&Wang X..(2020).Size-based bioavailability of land-based DON and its impact on eutrophication of Jiaozhou bay.Marine Pollution Bulletin,152.
MLA	Li M.,et al."Size-based bioavailability of land-based DON and its impact on eutrophication of Jiaozhou bay".Marine Pollution Bulletin 152(2020).