Dryland ecosystems cover more than one third of the earth s land surface and are home to about one-fourth of the earth s population. Biological diversity are heterogeneously distributed through out the earth's surface.However, they are facing crucial problems for survival. The biggest challenge in the drylands of the globe in general and that of Ethiopia in particular is environmental degradation aggravated by anthropogenic activities. However, there are areas which have economical and social benefits at local, national and international level and need due attention for conservation. Boke...