DESERT BIOLOGY
SPECIAL TOPICS ON THE PHYSICAL AND
BIOLOGICAL ASPECTS OF ARID REGIONS
Edited by
G. W. BROWN, JR.
COLLEGE OF FISHERIES
UNIVERSITY O F WASHINGTON
SEATTLE, WASHINGTON
VOLUME II
1974
@
ACADEMIC PRESS
NEW YORK and LONDON
A Subsidiary of Harcourt Brace Jovanovich, Publishers