DOI: 10.1016/j.jhydrol.2019.124526
论文题名: Relative influence of forest and cropland on fluvial transport of soil organic carbon and nitrogen in the Nen River basin, northeastern China
作者: Wang S. ; Wang X. ; He B. ; Yuan W.
刊名: Journal of Hydrology
ISSN: 221694
出版年: 2020
卷: 582 语种: 英语
英文关键词: Cropland
; Dissolved organic carbon
; Floods
; Forest
; Total dissolved nitrogen
Scopus关键词: Aquatic ecosystems
; Dissolution
; Floods
; Forestry
; Land use
; Nitrogen
; Rivers
; Stream flow
; Watersheds
; Carbon and nitrogen
; Cropland
; Dissolved nitrogen
; Dissolved organic carbon
; DOC concentrations
; Ecosystem functions
; Forest
; Soil organic carbon and nitrogen
; Organic carbon
英文摘要: Riverine transport of carbon and nitrogen strongly impacts terrestrial and aquatic ecosystem functions but is itself affected by changes in land cover and land use. China's Nen River basin has experienced widespread conversion from forest to cropland in the past century, making it representative of similar global land use changes. We assessed organic carbon and nitrogen transport in this basin during 2018 and 2019, using water samples collected at one-hour intervals during the twelve flood events in two sub-basins (the Yalu and Yin rivers) dominated by forests and cropland, respectively. We also assessed dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) concentrations from 19 sampling sites distributed throughout the Nen River basin, in combination with hydrological records, to investigate the impacts of land cover on riverine carbon and nitrogen fluxes. The forested Yalu river basin showed significantly higher DOC content and lower TDN content than Yin river basin. Riverine DOC concentrations during non-flood periods in the forested Yalu river basin were significantly higher than in the cultivated Yin river basin, but riverine TDN concentrations were lower. Throughout the Nen River basin and its sub-basins, riverine TDN content was proportional to cropland area. During the twelve flood events, riverine DOC and TDN varied widely over time in the Yin and Yalu river basins, possibly due to dilution effects of water originating from different land covers within the basins. Our results demonstrate that land cover is the principal cause of changes in riverine DOC and TDN content in this region. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159069
Appears in Collections: 气候变化与战略
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作者单位: Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong 519082, China; Faculty of Geographical Science, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100038, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100038, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
Recommended Citation:
Wang S.,Wang X.,He B.,et al. Relative influence of forest and cropland on fluvial transport of soil organic carbon and nitrogen in the Nen River basin, northeastern China[J]. Journal of Hydrology,2020-01-01,582