The variation of morphological features and mineralogical components of biological soil crusts in the Gurbantunggut Desert of Northwestern China

CORC > 新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所(2010年以前数据)

	The variation of morphological features and mineralogical components of biological soil crusts in the Gurbantunggut Desert of Northwestern China
	Chen ; Zhang ; Li ; Wei ; Zhang ; Wu ; Rongyi ; Yuanming ; Yuan ; Wenshou ; Jing ; Nan
刊名	ENVIRONMENTAL GEOLOGY
	2009
卷号	57 期号:5 页码:1135-1143
关键词	TENGGER DESERT MICROBIOTIC CRUST DEW DEPOSITION MICROSTRUCTURE VEGETATION CALCITE SURFACE ISRAEL
ISSN号	0943-0105
通讯作者	Zhang, YM, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
中文摘要	Increasingly complex life forms were found in older biological soil crusts in the Gurbantaunggut Desert in Northwestern China. These crusts may play a critical role in mineral erosion and desert soil formation by modifying the weathering environment and ultimately affecting mineralogical variance. To test this hypothesis, variations in the morphological features and mineralogical components of successional biological soil crusts at 1 cm were studied by optical microscopy, SEM and grain size analysis. Concentrations of erosion-resistant minerals decreased with crust succession, while minerals susceptible to weathering increased with crust development. Neogenetic minerals were found in late stage crusts, but not in early stage crusts. Silt and clay concentrations were highest in early formation crusts and soil mean particle size decreased with crust succession. Cyanobacteria, lichen and moss were shown to erode and etch rocks, and secondary minerals produced by weathering were localized with the living organisms. Thus, more developed crusts appeared to contribute to greater mineral weathering and may be a major cause of mineralogical variance seen in the Gurbantunggut Desert. The greater activity and complexity of older crusts, as well as their improved moisture condition may function to accelerate mineral weathering. Therefore, protection and recovery of biological crusts is vital for desert soil formation.
收录类别	SCI
公开日期	2011-08-19
内容类型	期刊论文
源URL	[http://ir.xjlas.org/handle/365004/10180]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	Chen,Zhang,Li,et al. The variation of morphological features and mineralogical components of biological soil crusts in the Gurbantunggut Desert of Northwestern China[J]. ENVIRONMENTAL GEOLOGY,2009,57(5):1135-1143.
APA	Chen.,Zhang.,Li.,Wei.,Zhang.,...&Nan.(2009).The variation of morphological features and mineralogical components of biological soil crusts in the Gurbantunggut Desert of Northwestern China.ENVIRONMENTAL GEOLOGY,57(5),1135-1143.
MLA	Chen,et al."The variation of morphological features and mineralogical components of biological soil crusts in the Gurbantunggut Desert of Northwestern China".ENVIRONMENTAL GEOLOGY 57.5(2009):1135-1143.