Authenticated (18/05/2006) by John Newby, Director of the Sahara Conservation Fund (SCF).
http://www.saharaconservation.org
Desertification: A process of sustained decline of the biological productivity of arid and semiarid land; the end-result is desert, or skeletal soil that is irrecoverable.
Territories: Areas occupied and defended by an animal, a pair of animals or a colony.