Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert

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)

	Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert
	Wang Xueqin ; Zhang Yuanming ; Jiang Jin ; Yang Weikang ; Guo Hongxu ; Hu Yongfeng
刊名	JOURNAL OF GEOGRAPHICAL SCIENCES
	2009
卷号	19 期号:3 页码:299-308
关键词	SOIL SAND
ISSN号	1009-637X
通讯作者	Wang, XQ, CAS, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China
中文摘要	Intensive grazing in spring-summer has been responsible for environmental degradation of the Gurbantunggut Desert in recent years. The coverage of plants and biological crusts, sand surface stability and physicochemical characteristics of soil on the dune surface were conducted in 2002 (winter grazing) and 2005 (spring-summer grazing). The results showed that over 80% of the total area of the dune surface was covered by well-developed biological crusts and plants in 2002, when the interdune and middle to lower part of dune slopes were stabilized and only the crest had 10-40 m wide mobile belt. Affected by spring-summer grazing in 2005, over 80% of the total cover of biological crust was destructed and the plant coverage only reached 1/5 of that in 2002, especially the ephemeral plant cover had a great change. The value of sand transport potential in 2005 only reached 1/3 of that in 2002, but the total surface activity in 2005 was 1.6 times stronger than that in 2002. Meanwhile the mobile area began to expand from the dune top to the whole dune surface following spring-summer grazing. Compared with 2002, medium sand content of the dune surface soil increased by 13.9%, while that of fine and very fine sands decreased by 7.4% and 8.0% respectively in 2005 and the soil organic matter in 2005 was only about 1/2 of that in 2002. It is obvious that the presence of snow cover and frozen soil in winter could avoid the surface structure destruction in winter, while spring-summer grazing made excessive damage to biologic crusts and ephemeral plants. Spring is the main windy season in Gurbantunggut Desert and therefore intensive activity of dune surface occurred following spring-summer grazing, which led to a great loss of fine sand and organic matter. It can be seen that grazing season have a significant influence on the sustainable development of the desert ecosystem in Northwest China.
学科主题	自然地理学
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/365004/10156]
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	Wang Xueqin,Zhang Yuanming,Jiang Jin,et al. Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2009,19(3):299-308.
APA	Wang Xueqin,Zhang Yuanming,Jiang Jin,Yang Weikang,Guo Hongxu,&Hu Yongfeng.(2009).Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert.JOURNAL OF GEOGRAPHICAL SCIENCES,19(3),299-308.
MLA	Wang Xueqin,et al."Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert".JOURNAL OF GEOGRAPHICAL SCIENCES 19.3(2009):299-308.