干旱区生态环境知识资源中心(Arid): Temporal and spatial changes in soil organic carbon and soil inorganic carbon stocks in the semi-arid area of northeast China

Arid

DOI	10.1016/j.ecolind.2022.109776
	Temporal and spatial changes in soil organic carbon and soil inorganic carbon stocks in the semi-arid area of northeast China
	Wang, Shuai; Zhuang, Qianlai; Zhou, Mingyi; Jin, Xinxin; Yu, Na; Yuan, Ting
通讯作者	Jin, XX
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2023
卷号	146
英文摘要	Soil organic carbon (SOC) and soil inorganic carbon (SIC) has important effects on soil physical, chemical and biological properties. They play an important role in coordinating the relationship between soil water and air, increasing soil water holding capacity and improving plant productivity. In this study, a boosted regression trees (BRT) model was developed to map the spatial distribution carbon stocks in the semi-arid region of Northeast China in 1990 and 2015. During the two periods, 10-fold cross-validation technology was used to test the performance and uncertainty of BRT model. In order to construct the model, 9 environmental variables (derived from climate, topography and biology) and 173 (1990) and 223 (2015) topsoil (0-30 cm) samples were used. The comparison between estimated and observed data shows that the RMSE of SOC and SIC stocks were 0.53 kgm(-2) and 0.19 kgm(-2) in 1990, and 0.65 kgm(-2) and 0.20 kgm(-2) in 2015, respectively. Elevation, normalized difference vegetation index, mean annual precipitation and Landsat band 3 were identifies as critical environmental factors for simulating the spatial distribution of SOC, accounting for 76.6 % and 70.3 % of the total relative importance in 1990 and 2015, respectively. Mean annual precipitation, mean annual temperature and topographic wetness index were the critical environmental factors for simulating the spatial variation of SIC during the two periods. Land use change also played an important role in the spatial variability of SOC and SIC stocks. In the past 25 years, soil carbon stocks decreased from 6.2 kg m(-2) in 1990 to 5.9 kg m(-2) in 2015. The spatial distribution pattern of SOC was high in northeastern area and low in southwestern area during the two periods, while the spatial distribution pattern of SIC was opposite to that of SOC stocks. The mapped soil carbon stock distribution is fundamental to future study of soil carbon cycle and regional carbon balance in semi-arid regions.
英文关键词	Soil organic carbon Soil inorganic carbon Digital soil mapping Boosted regression trees
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000900180200001
WOS关键词	LAND-USE ; REGRESSION ; NITROGEN ; STORAGE ; CLIMATE ; VARIABLES ; FOREST
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395912
推荐引用方式 GB/T 7714	Wang, Shuai,Zhuang, Qianlai,Zhou, Mingyi,et al. Temporal and spatial changes in soil organic carbon and soil inorganic carbon stocks in the semi-arid area of northeast China[J],2023,146.
APA	Wang, Shuai,Zhuang, Qianlai,Zhou, Mingyi,Jin, Xinxin,Yu, Na,&Yuan, Ting.(2023).Temporal and spatial changes in soil organic carbon and soil inorganic carbon stocks in the semi-arid area of northeast China.ECOLOGICAL INDICATORS,146.
MLA	Wang, Shuai,et al."Temporal and spatial changes in soil organic carbon and soil inorganic carbon stocks in the semi-arid area of northeast China".ECOLOGICAL INDICATORS 146(2023).