Biological soil crusts are the community of organisms living at the surface of desert soils.Major components are cyanobacteria, green algae, microfungi, mosses, liverworts and lichens.

• 生物土结皮生长在沙漠土壤表层的有机体群落，主要由蓝细菌、绿藻、微小真菌、苔藓、地钱和地衣等组成。