Isotopically-tracked hydrological changes in carbon cycling and its sources in a Chinese subtropical forested watershed

doi:10.1016/j.jhydrol.2019.06.011

	Isotopically-tracked hydrological changes in carbon cycling and its sources in a Chinese subtropical forested watershed
	Zhao, Guoqing 2,3,5; Gao, Yang 1,4; Wang, Li 2,3,5; Hao, Zhuo 1,4; Wen, Xuefa 1,4; Song, Xianwei 1,4
刊名	JOURNAL OF HYDROLOGY
	2019-08-01
卷号	575 页码:1041-1051
关键词	Subtropical watershed Wet deposition of carbon Rainfall-runoff Carbon flux Isotope analysis
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2019.06.011
通讯作者	Gao, Yang(gaoyang@igsnrr.ac.cn) ; Wang, Li(wangli5208@nwsuaf.edu.cn)
英文摘要	Forests are important components of the terrestrial ecosystem that play major roles in carbon cycling and associated environmental changes, but more knowledge of the processes involved is required. Therefore, carbon wet deposition and rainfall-runoff processes were examined, as well as carbon fluxes and sources in water in the Xiangxi River watershed, a typical subtropical forested watershed in China. Wet deposition of carbon amounted to 1.31 x 10(4) kg km(-2) between June 2015 and May 2016 (inclusive). The concentration of measured forms of carbon in rainwater of single rainfall event peaked in summer, when the concentration of dissolved total carbon (DTC) was 16.5 mg L-1. In 2016, rainfall-runoff amounted to 7440 kg km(-2), accounting for about 57% of the carbon wet deposition in the watershed. The forest ecosystem in the watershed was found to be a carbon sink every month of the year, with net ecosystem CO2 exchange (NEE) in 2016 of -5.11 x 10(5) kg C km(-2), and monthly NEE was lowest in July (- 8.93 x 10(4) kg C km(-2)). The C-13/C-12 ratio in dissolved inorganic carbon in the river water, relative to Pee Dee Belemnite (delta C-13(DIC)), was higher in the dry season (range, -12.00 to -9.70 parts per thousand; mean, -11.0 parts per thousand) than in the rainy season (range, -14.00 to -12.20 parts per thousand; mean, -12.90 parts per thousand), and higher in downstream reaches (mean values in winter and spring: -10.45 and -12.35 parts per thousand, respectively) than in upstream and middle reaches (-10.63 and -13.30 parts per thousand, -11.63 and -12.87 parts per thousand). In addition, atmospheric precipitation made the highest contributions to the C concentration in the river water in spring and winter (48.6 and 43.2%, respectively).
资助项目	National Nature Science Foundation of China[41830860] ; National Nature Science Foundation of China[41871080] ; National Key R&D program of China[2016YFC0500202] ; Youth Innovation Promotion Association CAS
WOS关键词	DISSOLVED INORGANIC CARBON ; EVERGREEN CONIFEROUS PLANTATION ; CO2 FLUX ; TERRESTRIAL ECOSYSTEMS ; SEASONAL-VARIATION ; WET DEPOSITION ; DIOXIDE UPTAKE ; MIXED FOREST ; NITROGEN ; RIVER
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000488143000081
资助机构	National Nature Science Foundation of China ; National Key R&D program of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/129770]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Yang; Wang, Li
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 2.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Nat Resources & Environm, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Guoqing,Gao, Yang,Wang, Li,et al. Isotopically-tracked hydrological changes in carbon cycling and its sources in a Chinese subtropical forested watershed[J]. JOURNAL OF HYDROLOGY,2019,575:1041-1051.
APA	Zhao, Guoqing,Gao, Yang,Wang, Li,Hao, Zhuo,Wen, Xuefa,&Song, Xianwei.(2019).Isotopically-tracked hydrological changes in carbon cycling and its sources in a Chinese subtropical forested watershed.JOURNAL OF HYDROLOGY,575,1041-1051.
MLA	Zhao, Guoqing,et al."Isotopically-tracked hydrological changes in carbon cycling and its sources in a Chinese subtropical forested watershed".JOURNAL OF HYDROLOGY 575(2019):1041-1051.