干旱区生态环境知识资源中心(Arid): Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe

Arid

DOI	10.1016/j.scitotenv.2021.149700
	Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe
	Ding, Lei; Li, Zhenwang; Shen, Beibei; Wang, Xu; Xu, Dawei; Yan, Ruirui; Yan, Yuchun; Xin, Xiaoping; Xiao, Jingfeng; Li, Ming; Wang, Ping
通讯作者	Xin, XP (corresponding author), Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China. ; Xiao, JF (corresponding author), Univ New Hampshire, Earth Syst Res Ctr, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	803
英文摘要	The Eurasian steppe is the largest steppe region in the world and is an important part of the global grassland ecosystem. The eastern Eurasian steppe has favorable hydrothermal conditions and has the highest productivity and the richest biodiversity. Located in the arid and semi-arid region, the eastern Eurasian steppe has experienced large-scale grassland degradation due to dramatic climate change and intensive human activities during the past 20 years. Hence, accurate estimation of aboveground biomass (AGB, gC m(-2)) and belowground biomass (BGB, gC m(-2)) is necessary. In this study, plenty of AGB and BGB in-situ measurements were collected among dominated grassland types during summer in 2013 and 2016-2018 in the eastern Eurasian steppe. Vegetation indices from the Moderate Resolution Imaging Spectroradiometer (MODIS), Digital Elevation Model (DEM) and climate variables were chosen as independent variables to establish predictive models for AGB and BGB with random forest (RF). Both AGB (R-2 = 0.47, MAE = 21.06 gC m(-2), and RMSE = 27.52 gC m(-2)) and BGB (R-2 = 0.44, MAE = 173.02 gC m(-2), and RMSE = 244.20 gC m(-2)) models showed acceptable accuracy. Then the RF models were applied to generate spatially explicit AGB and BGB estimates for the study area over the last two decades (2000-2018). Both AGB and BGB showed higher values in the Greater Khingan Mountains and decreased gradually to the east and west sides. The mean values for AGB and BGB were 62.16 gC m(-2) and 531.35 gC m(-2), respectively. The climatic factors were much more important in controlling biomass than anthro-pogenic drivers, and shortage of water and raising temperature were the main limiting factor of AGB and BGB, respectively, in the peak growth season. These findings provide scientific data for the scientific management of animal husbandry and can contribute to the sustainable development of grassland ecology in the eastern Eurasian steppe. (C) 2021 Published by Elsevier B.V.
英文关键词	Carbon cycle MODIS Climatic factors Human activity Aboveground biomass Belowground biomass
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000702878600017
WOS关键词	NET PRIMARY PRODUCTIVITY ; INNER-MONGOLIA ; CARBON STORAGE ; GRASSLAND BIOMASS ; SOIL-TEMPERATURE ; SPATIOTEMPORAL VARIATIONS ; TERRESTRIAL ECOSYSTEMS ; CLIMATIC-CHANGE ; RANDOM FOREST ; ALLOCATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364612
作者单位	[Ding, Lei; Shen, Beibei; Wang, Xu; Xu, Dawei; Yan, Ruirui; Yan, Yuchun; Xin, Xiaoping] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China; [Li, Zhenwang] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China; [Xiao, Jingfeng] Univ New Hampshire, Earth Syst Res Ctr, Inst Study Earth Oceans & Space, Durham, NH 03824 USA; [Li, Ming; Wang, Ping] China Geol Survey, Nat Resources Comprehens Survey Command Ctr, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Ding, Lei,Li, Zhenwang,Shen, Beibei,et al. Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe[J],2022,803.
APA	Ding, Lei.,Li, Zhenwang.,Shen, Beibei.,Wang, Xu.,Xu, Dawei.,...&Wang, Ping.(2022).Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe.SCIENCE OF THE TOTAL ENVIRONMENT,803.
MLA	Ding, Lei,et al."Spatial patterns and driving factors of aboveground and belowground biomass over the eastern Eurasian steppe".SCIENCE OF THE TOTAL ENVIRONMENT 803(2022).