drylands soil sample (IMAGE)
Caption
A drylands soil sample showing biocrust filaments — microscopic, sticky threads produced by cyanobacteria that weave together to form a "living skin" on the surface of arid soils.
Credit
Penn State
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.
License
CC BY-NC-ND