干旱区生态环境知识资源中心(Arid): Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas

Arid

	Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas
	Chen Ye; Lian Bin; Yin Zuoying; Tang Yuan
来源期刊	Journal of Earth Science
ISSN	1674-487X
出版年	2014
卷号	25 期号:4 页码:662-667
英文摘要	The weathering of carbonate rocks by biological soil crusts (BSC) in karst areas is very common. It is helpful to understand the weathering mechanisms and processes for avoiding karst rock-desertification. The weathering of carbonate rocks by BSC in karst areas, namely the expansion, contraction and curl resulting from environmental wetting-drying cycles, was investigated and analyzed in this paper. The bulk density, area and thickness of BSC were determined and the weathering amount of limestone and dolomite per unit area of BSC was calculated as 3 700 and 3 400 g m-2; the amount of biomass on the surface of limestone and dolomite was calculated as 1 146 and 1 301 g ?m-2, respectively. Such an increased weathering amount was not only the result of chemical and physical weathering of BSC on carbonate rocks, but also the attachment and cementation of BSC to clay particles, dust-fall, sand particles, solid particles brought by strong air currents, wind and other factors in the surrounding environment, which may also be related to the special environment and the special time period. Based on the results obtained, a weathering mode of BSC is studied, and the mechanisms of weathering by BSC are discussed. In conclusion, we suggest that the mechanical force exerted by the expansion and constriction of gelatinous and mucilaginous substances through wetting and drying of BSC play a significant role in the physical weathering process of the carbonate substrates.
英文关键词	biological soil crust dolomite limestone weathering amount biomass
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5191090
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335382
作者单位	Chen Ye, School of Chemistry and Chemical Engineering, Guizhou University, Key Laboratory of Karst Environment and Geological Hazard Prevention, Ministry of Education, Guiyang, Guizhou 550003, China.; Lian Bin, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Science, Nanjing Normal University, Jiangsu Key Laboratory for Microbes and Functional Genomics, Nanjing, Jiangsu 210023, China.; Yin Zuoying, Puding Karst Ecosystem Research Station, Institute of Geochemistry, Chinese Academy of Sciences, State Key Laboratory of Environmental Geochemistry.; Tang Yuan, Puding Karst Ecosystem Research Station, Institute of Geochemistry, Chinese Academy of Sciences, State Key Laboratory of Environmental Geochemistry.
推荐引用方式 GB/T 7714	Chen Ye,Lian Bin,Yin Zuoying,et al. Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas[J],2014,25(4):662-667.
APA	Chen Ye,Lian Bin,Yin Zuoying,&Tang Yuan.(2014).Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas.Journal of Earth Science,25(4),662-667.
MLA	Chen Ye,et al."Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas".Journal of Earth Science 25.4(2014):662-667.