Vegetation cover maps have been derived by

AcknowledgmentsWe would like to thank Candice Luebbering, Taylor Christian, Anel Avila, Kate Macklin, Carol Sawyer, and Clayton Whitesides for their help in the field, and George Malanson for his assistance in the field and helpful comments and discussion throughout this K-Ras(G12C) inhibitor 6 research. Partial funding for this work was provided by the Association of American Geographers Mel Marcus Fund for Physical Geography, the Geological Society of America, the Ray and Marian Butler Scholarship from the Department of Geography of Texas State University, and the American Alpine Club. Thanks to the staff at Glacier National Park for allowing this research to take place and for all their helpful assistance.
Land use change; Agricultural areas; Soil erosion; Desertification; Sustainable land management; Crete
1. Introduction
Similar with soil erosion, land desertification which is considered as a type of advance degradation in the Mediterranean region, affects semi-arid and dry regions where lack of water is the main limiting factor for the soil productivity (Lal, 1927 and Kosmas et al., 2003). Desertification is a land degradation process triggered by excessive human activity in areas with unfavorable natural characteristics (Kosmas et al., 1999a, Kosmas et al., 1999b and Yassoglou and Kosmas, 2001). The Environmentally Sensitive Areas (ESAs) to desertification scheme, originally developed within the MEDALUS project (Kosmas et al., 1999a and Kosmas et al., 1999b), produced a flexible indicator system for identifying potentially threatened areas.