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Anthropogenic Disturbance Stimulates the Export of Dissolved Organic Carbon to Rivers on the Tibetan Plateau by Hui Nai; Jun Zhong; Yuanbi Yi; Manting Lai; Ding He; Thorsten Dittmar; Cong-Qiang Liu; Si-Liang Li; Sheng Xu is a Environmental Science article available to read on EtoBox.
What is Anthropogenic Disturbance Stimulates the Export of Dissolved Organic Carbon to Rivers on the Tibetan Plateau about?
The impacts of human activities on the riverine carbon (C) cycle have only recently been recognized, and even fewer studies have been reported on anthropogenic impacts on C cycling in rivers draining the vulnerable alpine areas. Here, we examined carbon isotopes (δ 13 C DOC and Δ 14 C DOC ), fluorescence, and molecular compositions of riverine dissolved organic matters (DOM) in the Bailong River catchment, the eastern edge of the Tibetan Plateau to identify anthropogenic impacts on the C cycle. Human activities show limited impact on dissolved organic carbon (DOC) concentration, but significantly increased the age of DOC (from modern to ∼1600 yr B.P.) and changed the molecular compositions through agriculture and urbanization despite in the catchment with low population density. Agricultural activities indirectly increased the leaching of N-containing aged organic matter from deep soil to rivers. Urbanization released S-containing aged C from fossil products into rivers directly through wastewater. The aged DOC from agricultural activity and wastewater discharge was partly biolabile and/or photolabile. This study highlights that riverine C is sensitive to anthropogenic disturbance.
Who reads Anthropogenic Disturbance Stimulates the Export of Dissolved Organic Carbon to Rivers on the Tibetan Plateau?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Hui Nai; Jun Zhong; Yuanbi Yi; Manting Lai; Ding He; Thorsten Dittmar; Cong-Qiang Liu; Si-Liang Li; Sheng Xu
- Publisher
- American Chemical Society (ACS)
- Published
- 2023
- Language
- EN
- Field
- Environmental Science (Physical Sciences)