Spatial continuity and local conditions determine spatial pattern of dried soil layers on the Chinese Loess Plateau

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 生态系统研究网络观测与模拟重点实验室 > 生态网络实验室

	Spatial continuity and local conditions determine spatial pattern of dried soil layers on the Chinese Loess Plateau
	Zhang, CC; Shao, MA; Jia, XX
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2017
卷号	17 期号:8 页码:2030-2039
关键词	Dried soil layer Feedback Spatial continuity The Loess Plateau Water-limited region
ISSN号	1439-0108
英文摘要	Purpose Many efforts of restoring vegetation have ignored the feedbacks between biotic and abiotic factors that have developed in water-limited ecosystem. Dried soil layers (DSLs) have formed extensively on the Chinese Loess Plateau (CLP). The objective of this study was to identify the primary factors controlling spatial pattern of DSLs on the CLP. Materials and methods Two DSL indices (DSL thickness (DSLT) and soil water content in a DSL (DSL-SWC)) were estimated by measuring SWC to a depth of 5 m at 86 sites along a south-north transect on the CLP in 2013. The correlation between the spatial pattern of DSLs and environmental factors was determined with redundancy analysis (RDA). Result and discussion DSLs had formed at most of the sites (66 of the 86 sites) along the transect. The sites without DSLs were primarily in an irrigated agricultural zone. DSLT was > 400 cm and generally increased from south to north, and DSL-SWC was 2.54% (v/v) in the semi-arid zone of the transect. The connected features of DSLs between connected neighboring sampling units exhibited a much wider extent. A total of nine environmental variables were the primary contributors to the spatial pattern of the DSLs, explaining approximately 47.3% of the variability. Local conditions were responsible for the higher proportion of explained variability than climatic factors. In addition, field capacity was the most important factor in all environmental factors, which may have influenced water-holding capacity. Conclusion This study concludes that spatial continuity and local conditions determine the spatial pattern of DSLs at a regional scale. Understanding the characteristic of DSLs is useful for efficiency of vegetation restoration and soil water management.
学科主题	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000405581200003
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/44027]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Zhang, CC,Shao, MA,Jia, XX. Spatial continuity and local conditions determine spatial pattern of dried soil layers on the Chinese Loess Plateau[J]. JOURNAL OF SOILS AND SEDIMENTS,2017,17(8):2030-2039.
APA	Zhang, CC,Shao, MA,&Jia, XX.(2017).Spatial continuity and local conditions determine spatial pattern of dried soil layers on the Chinese Loess Plateau.JOURNAL OF SOILS AND SEDIMENTS,17(8),2030-2039.
MLA	Zhang, CC,et al."Spatial continuity and local conditions determine spatial pattern of dried soil layers on the Chinese Loess Plateau".JOURNAL OF SOILS AND SEDIMENTS 17.8(2017):2030-2039.