Do vehicle track disturbances affect the productivity of soil growing lichens in a fog desert.  
Do vehicle track disturbances affect the productivity of soil growing lichens in a fog desert.

Creator:   Lalley, J. S; Viles, H. A Description:   Publications Publisher:   Oxford University Centre for the Environment Date:   2006 Language:   English Subjects:   Biological soil crust; Photosynthesis; Namib Desert; Fluorescence