干旱区生态环境知识资源中心(Arid): Spatial variation of global surface soil rock fragment content and its roles on hydrological and ecological patterns

Arid

DOI	10.1016/j.catena.2021.105752
	Spatial variation of global surface soil rock fragment content and its roles on hydrological and ecological patterns
	Lai, Xiaoming; Liu, Ya; Li, Liuyang; Zhu, Qing; Liao, Kaihua
通讯作者	Zhu, Q (corresponding author), Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Peoples R China. ; Zhu, Q (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	208
英文摘要	Rock fragments (RFs, material particles with diameter > 2 mm) are widely distributed in soils over globe. However, spatial pattern of RF content (RFC) and its roles on hydrological and ecological patterns have remained unclear at the global scale. In this study, based on the collected global datasets, we investigated the relationships between mean annual temperature (MAT), mean annual precipitation (MAP), elevation and RFC at 0-5 cm soil depth. In addition, we also examined the links of RFC to representative hydrological and ecological indicators (soil water content or SWC, and normalized difference vegetation index or NDVI, respectively). Results showed that through affecting the pedogenic and morphogenic processes, temperature, precipitation and elevation presented significant relationships with RFC over the globe. When MAT < 20 degrees C, RFC decreased with MAT increasing, due to that high temperature could promote RF weathering and thus soil production; while when MAT > 20 degrees C, RFC slightly increased with MAT increasing, due to that extreme high temperature induced arid condition would surpass soil production. RFC decreased with MAP increasing, because precipitation increased SWC and hydrologic flow and thus enhanced soil production. In addition, higher elevation zones usually had colder condition and greater loss of fine-textured soils due to erosion, and thus RFC increased with elevation increasing. Furthermore, a RFC threshold of about 0.2 m(3) m(-3) was identified. When RFC < 0.2 m(3) m(-3), existence of RFs may improve the soil pore structure and thus water and nutrient retention capacity. Therefore, higher SWC and NDVI were observed. However, when RFC > 0.2 m(3) m(-3), due to poor soil water and nutrient retention capacity, as well as lower MAT with higher elevation, or lower MAP, lower SWC and NDVI were observed. These findings can supplement the lack of knowledge on RFs and its effects from the global perspective.
英文关键词	Rock fragment Soil water content Normalized difference vegetation index Spatial pattern Soil property
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000700576300031
WOS关键词	HYDRAULIC-PROPERTIES ; SIZE DISTRIBUTION ; NITROGEN-CYCLE ; RAINFALL ; EROSION ; SENSITIVITY ; CONSUMPTION ; SIMULATION ; HILLSLOPES ; MOUNTAINS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362832
作者单位	[Lai, Xiaoming; Liu, Ya; Li, Liuyang; Zhu, Qing; Liao, Kaihua] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Peoples R China; [Lai, Xiaoming; Liu, Ya; Li, Liuyang; Zhu, Qing; Liao, Kaihua] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lai, Xiaoming,Liu, Ya,Li, Liuyang,et al. Spatial variation of global surface soil rock fragment content and its roles on hydrological and ecological patterns[J],2022,208.
APA	Lai, Xiaoming,Liu, Ya,Li, Liuyang,Zhu, Qing,&Liao, Kaihua.(2022).Spatial variation of global surface soil rock fragment content and its roles on hydrological and ecological patterns.CATENA,208.
MLA	Lai, Xiaoming,et al."Spatial variation of global surface soil rock fragment content and its roles on hydrological and ecological patterns".CATENA 208(2022).