Arid
DOI10.1007/s12583-014-0455-1
Weathering of Carbonate Rocks by Biological Soil Crusts in Karst Areas
Chen, Ye1; Lian, Bin2; Yin, Zuoying3; Tang, Yuan3
通讯作者Lian, Bin
来源期刊JOURNAL OF EARTH SCIENCE
ISSN1674-487X
EISSN1867-111X
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
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000339462600005
WOS关键词RAIN-IMPACTED FLOW ; CALCAREOUS SOILS ; EROSION
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183209
作者单位1.Guizhou Univ, Sch Chem & Chem Engn, Key Lab Karst Environm & Geol Hazard Prevent, Guiyang 550003, Peoples R China;
2.Nanjing Normal Univ, Coll Life Sci, Jiangsu Engn & Technol Res Ctr Microbiol, Jiangsu Key Lab Microbes & Funct Genom, Nanjing 210023, Jiangsu, Peoples R China;
3.Chinese Acad Sci, Inst Geochem, Puding Karst Ecosyst Res Stn, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
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.
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