气候变化领域集成服务门户(CCPortal): Effects of land use and land cover change on soil organic carbon storage in the Hexi regions, Northwest China

CCPortal

DOI	10.1016/j.jenvman.2022.114911
	Effects of land use and land cover change on soil organic carbon storage in the Hexi regions, Northwest China
	Li, Yongge; Liu, Wei; Feng, Qi; Zhu, Meng; Yang, Linshan; Zhang, Jutao
发表日期	2022
ISSN	0301-4797
EISSN	1095-8630
卷号	312
英文摘要	Soil organic carbon (SOC) storage in arid inland regions is significantly affected by land use and land cover change (LUCC) associated with climate change and agricultural activities. A systematic evaluation to the LUCC effects on SOC storage could enable us to better manage soil carbon pools in arid inland regions. Here, we evaluated the effects of LUCC on SOC storage in the Hexi Regions based on high-resolution SOC and LUCC maps derived from Landsat imagery and digital soil mapping using machine learning algorithm and environmental covariates. The results showed that SOC generally increased from northwest to southeast over the Hexi Regions with an average stock of 7.15 kg C m(-2) at a soil depth of 100 cm and a total storage of 2783.05 Tg C. The SOC stock and storage in the Qilian Mountains (mountains) was about 3.90 and 4.55 times higher than that in the Hexi Corridor (plains), respectively. It was estimated that LUCC over the past four decades caused a net increase of 23.41 and 18.19 Tg C in total SOC storage for the Qilian Mountains and Hexi Corridor, respectively. Specifically, the development in grasslands quality as well as the land-use category conversion from the bare land to grassland mainly contributed to the increase in SOC storage of the Qilian Mountains, where the LUCC was mainly driven by climate change. By contrast, the SOC storage change in the Hexi Corridor was mainly associated with the conversion from sandy land and low-cover grassland to cropland as well as sandy land to grassland, being mainly affected by intense cropland expansion and desertification control. Our results highlighted the importance of climate change and cropland expansion in enhancing SOC storage of the Qilian Mountains and Hexi corridor, respectively.
英文关键词	LUCC; SOC storage; Cropland expansion; Climate change; Hexi corridor; Qilian mountains
语种	英语
WOS研究方向	Environmental Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000783076100005
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280421
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Li, Yongge,Liu, Wei,Feng, Qi,et al. Effects of land use and land cover change on soil organic carbon storage in the Hexi regions, Northwest China[J],2022,312.
APA	Li, Yongge,Liu, Wei,Feng, Qi,Zhu, Meng,Yang, Linshan,&Zhang, Jutao.(2022).Effects of land use and land cover change on soil organic carbon storage in the Hexi regions, Northwest China.JOURNAL OF ENVIRONMENTAL MANAGEMENT,312.
MLA	Li, Yongge,et al."Effects of land use and land cover change on soil organic carbon storage in the Hexi regions, Northwest China".JOURNAL OF ENVIRONMENTAL MANAGEMENT 312(2022).