1. Forest Engineer, Associate Professor, Agronomist and Forestry Engineering School, Rural Engineering, Univ. of Córdoba, 14014 Córdoba, Spain (corresponding author).
2. Civil Engineer, Scientist, EPA, Office of Research and Development, NERL-ESD-Landscape Ecology Branch, P.O. Box 93478, Las Vegas, NV 89193-3478.
3. Civil Engineer, Associate Professor, Dept. of Agri-Food and Environmental Systems, Univ. of Catania, Catania 95123, Italy.
4. Scientist, Agronomy Engineering, Institute for Sustainable Agriculture, IAS, CSIC, Apartado 4084, 14080 Córdoba, Spain.