干旱区生态环境知识资源中心(Arid): Precipitation and soil particle size co-determine spatial distribution of biological soil crusts in the Gurbantunggut Desert, China

Arid

	Precipitation and soil particle size co-determine spatial distribution of biological soil crusts in the Gurbantunggut Desert, China
	Wu Lin; Zhang Yuanming
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:5 页码:701-711
英文摘要	Biological soil crusts (BSCs) are bio-sedimentary associations that play crucial ecological roles in arid and semi-arid regions. In the Gurbantunggut Desert of China, more than 27% of the land surface is characterized by a predominant cover of lichen-dominated BSCs that contribute to the stability of the desert. However, little is known about the major factors that limit the spatial distribution of BSCs at a macro scale. In this study, the cover of BSCs was investigated along a precipitation gradient from the margins to the center of the Gurbantunggut Desert. Environmental variables including precipitation, soil particle size, soil pH, electrical conductivity, soil organic carbon, total salt, total nitrogen, total phosphorus and total potassium were analyzed at a macro scale to determine their association with differing assemblages of BSCs (cyanobacteria crusts, lichen crusts and moss crusts) using constrained linear ordination redundancy analysis (RDA). A model of BSCs distribution correlated with environmental variables that dominated the first two axes of the RDA was constructed to clearly demonstrate the succession stages of BSCs. The study determined that soil particle size (represented by coarse sand content) and precipitation are the most significant drivers influencing the spatial distribution of BSCs at a macro scale in the Gurbantunggut Desert. The cover of lichen and moss crusts increased with increasing precipitation, while the cover of cyanobacteria crusts decreased with increasing precipitation. The cover of lichen and moss crusts was negatively associated with coarse sand content, whereas the cover of cyanobacteria crusts was positively correlated with coarse sand content. These findings highlight the need for both the availability of soil moisture and a relatively stable of soil matrix, not only for the growth of BSCs but more importantly, for the regeneration and rehabilitation of disturbed BSC communities in arid and semi-arid lands. Thereby, this study will provide a theory basis to effectively increase soil stability in desert regions.
英文关键词	biological soil crust distribution macro scale redundancy analysis (RDA) disturbance temperate desert
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6353571
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336022
作者单位	Wu Lin, Hubei University for Nationalities;;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ;;Key Laboratory of Biogeography and Bioresource in Arid Land, Chinese Academy of Sciences, Enshi;;Urumqi, ;; 445000;;830011.; Zhang Yuanming, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Key Laboratory of Biogeography and Bioresource in Arid Land, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.
推荐引用方式 GB/T 7714	Wu Lin,Zhang Yuanming. Precipitation and soil particle size co-determine spatial distribution of biological soil crusts in the Gurbantunggut Desert, China[J],2018,10(5):701-711.
APA	Wu Lin,&Zhang Yuanming.(2018).Precipitation and soil particle size co-determine spatial distribution of biological soil crusts in the Gurbantunggut Desert, China.Journal of Arid Land,10(5),701-711.
MLA	Wu Lin,et al."Precipitation and soil particle size co-determine spatial distribution of biological soil crusts in the Gurbantunggut Desert, China".Journal of Arid Land 10.5(2018):701-711.