Biological soil crusts: webs of life in the desert
Fact sheet on the need to protect biological soil crusts in the desert. These crusts are most of the soil surface in deserts not covered by green plants and are inhabited by cyanobacterium (blue-green algae) and other organisms useful to the ecosystem.
U.S. Geological Survey Fact Sheet 065-01
This publication is available only as a PDF document.
, Desert ecosystems
, Human impacts
, Soil formation
, Soil resources
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