古尔班通古特沙漠不同区域生物结皮的分布及其与微生物关系

BSC is the main vegetation landscapes, and plays very important ecological functions in arid regions.in this research, 8 typical plots BSC were sampled, some contents were analyzed such as the coverage area, soil nutrition content and the soil microbes carbon usage. Based on the above contents, the relationship between soil microbes and the growth and development of BSC was discussed. The result showed that oil organic matter is positively correlated with the BSCs area. Moreover, the moss crusts area is positively correlated with soil organic matter, available nitrogen, available phosphorus and available potassium. The results of Biolog-ECO cultivation indicated that the soil microbial AWCD, species richness index BSC distributions in different regions and relationship with soil microbes in the Gurbantunggut desertH, species evenness index U and carbon source usage were higher in south of desert than that of the north, which means that with the development of BSC and higher coverage area, the soil microbial species is more rich, and the species distribution is more evenness. Besides this, the result also implied that esters and alcohols are the main carbon sources of BSC in different desert regions. The amines carbon source usage has significant positive correlation with the lichen crusts area, and there is significant negative correlation between acid carbon source usage and algal crusts area.