In fluence of degradation on soil water availability in an alpine swamp meadow on the eastern edge of the Tibetan Plateau

doi:10.1016/j.scitotenv.2020.137677

	In fluence of degradation on soil water availability in an alpine swamp meadow on the eastern edge of the Tibetan Plateau
	Pan, Tao 1; Hou, Shuai 1,2,3; Liu, Yujie 1; Tan, Qinghua 1; Liu, Yanhua 1; Gao, Xiaofei 4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-06-20
卷号	722 页码:13
关键词	Swamp meadow degradation Soil moisture content Soil water retention curve Plant available water Soil-water stress Tibetan Plateau
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.137677
通讯作者	Liu, Yujie(liuyujie@igsnrr.ac.cn)
英文摘要	Degraded ecosystems refer to systems that deviate from their natural state as a result of natural or anthropogenic disturbances. Alpine swamp meadows on the eastern edge of the Tibetan Plateau have dramatically degraded owing to climate change, overgrazing, and rodents. Understanding the influence of meadow degradation on soil water availability is essential for the development of hydrological models and alpine swamp meadows restoration, which has been poorly explored in the eastern Tibetan Plateau. In this study, we analyzed how degradation affects variation in soil water availability with a series of parameters derived from soil moisture content and soil water retention curves. Our results showed that (1) soil moisture content consistently decreased with degradation and increased with soil depth; (2) soil water retention curves decreased with increasing degradation due to coarser soils and organic matter loss. Field water capacity and the permanent wilting point decreased, whereas the air entry value increased with the severity of degradation; and (3) soil water availability, as represented by soil water potential, available soil water content and fraction was less responsive to degradation than individual soil moisture content or soil water retention curves, which showed similar decreasing trends. However, soil water potential, available soil water content and fraction under moderate and severe degradation were relatively lower than those under light degradation, especially in deep soil layers (>20 cm). Thus, swamp meadow degradation negatively influences soil water availability, which might impede water absorption by deeply rooted species, thereby inducing soil-water stress and possibly increasing drought vulnerability. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41671107] ; National Natural Science Foundation of China[41671037] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2016049] ; Programfor Kezhen Excellent Talents in the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences[2017RC101] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-DQC005]
WOS关键词	GRASSLAND DEGRADATION ; HYDRAULIC-PROPERTIES ; VEGETATION COVER ; CLIMATE-CHANGE ; RETENTION CURVE ; ORGANIC-MATTER ; LOESS PLATEAU ; MOISTURE ; VARIABILITY ; ECOSYSTEM
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000535472600017
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Programfor Kezhen Excellent Talents in the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159542]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Yujie
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China 3.Minist Agr & Rural Affairs, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China 4.Beijing Normal Univ, Fac Geog Sci, Beijing 100088, Peoples R China
推荐引用方式 GB/T 7714	Pan, Tao,Hou, Shuai,Liu, Yujie,et al. In fluence of degradation on soil water availability in an alpine swamp meadow on the eastern edge of the Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,722:13.
APA	Pan, Tao,Hou, Shuai,Liu, Yujie,Tan, Qinghua,Liu, Yanhua,&Gao, Xiaofei.(2020).In fluence of degradation on soil water availability in an alpine swamp meadow on the eastern edge of the Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,722,13.
MLA	Pan, Tao,et al."In fluence of degradation on soil water availability in an alpine swamp meadow on the eastern edge of the Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 722(2020):13.