干旱区生态环境知识资源中心(Arid): Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China

Arid

DOI	10.1016/j.catena.2020.104975
	Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China
	Sun, Qingfeng; Huguet, Arnaud; Zamanian, Kazem
通讯作者	Sun, QF (corresponding author), Northwest Normal Univ, Fac Geog, Lanzhou 730070, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	197
英文摘要	Carbonate rhizoliths and related features are environmental and ecological indicators of not only palaeosols, but also modern soils. They designate subaerial vadose and pedogenic diagenesis environments. Rhizoliths are commonly used as a tool for paleoenvironmental reconstructions, but uncertainty remains regarding their formation mechanisms. Field characteristics of the dune rhizoliths in the Badain Jaran Desert, NW China were analyzed to investigate formation mechanisms and interpret paleoenvironmental significance. Systematic field sampling and intensive examination showed that the tube-like rhizoliths without morphological structures of plant roots have been placed at the dune soil surface following erosion and weathering but the underground rhizoliths are still connected to the dead Artemisia roots. Rhizoliths occurred only along the windward, long gentle slopes of mega-dunes. Their distribution patterns of both types in connection with plant distribution and landscapes have been studied. Their petrological and mineralogical characters were performed in detail using microscopic and spectroscopic techniques (cathodoluminescence, scanning electronic microscopy and energy dispersive X-ray spectroscopy) in laboratory. Altogether, field and laboratory analyses showed that rhizolith cement is calcium carbonate and despite the high porosity of soil and high aridness of climate, soil moisture plays an important role in sustaining Artemisia growth and rhizolith formation. Desert rhizoliths can therefore be used as a proxy to infer local soil moisture and plant communities. Moreover, as soil moisture content is related to climate and landscape position, rhizoliths could indirectly be indicators of aboveground environmental conditions, e.g. annual precipitation or humidity.
英文关键词	Rhizoliths Dune soil Deflation and weathering Formation factors Soil environment
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000597208600021
WOS关键词	CALCAREOUS ROOT TUBES ; MICROBIALITE FORMATION ; ENVIRONMENTAL-CHANGES ; DUNE ; LAKE ; GROUNDWATER ; EVOLUTION ; VARNISH ; CLASSIFICATION ; CALCIFICATION
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/2XILL650/347790
作者单位	[Sun, Qingfeng] Northwest Normal Univ, Fac Geog, Lanzhou 730070, Peoples R China; [Huguet, Arnaud] Sorbonne Univ, UMR METIS, PSL, EPHE,CNRS, F-75005 Paris, France; [Zamanian, Kazem] Georg August Univ Goettingen, Dept Soil Sci Temperate Ecosyst, Buesgenweg 2, D-37077 Gottingen, Germany
推荐引用方式 GB/T 7714	Sun, Qingfeng,Huguet, Arnaud,Zamanian, Kazem. Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China[J],2021,197.
APA	Sun, Qingfeng,Huguet, Arnaud,&Zamanian, Kazem.(2021).Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China.CATENA,197.
MLA	Sun, Qingfeng,et al."Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China".CATENA 197(2021).