Professor, King Abdullah University of Science and Technology (KAUST)

Distinguished Professor, Department of Biology, University of New Mexico

Regents Professor Emeritus, Natural Resources, U Arizona

Professor of Environmental Sciences, University of Virginia

Director General "Centre de Suivi Ecologique"

Professor, Indiana University Indianapolis

USDA Agricultural Research Service, Range Management Research Unit at the Jornada …

Department of Ecology, Universidad de Alicante

Higher National School of Forests, Algeria

university of texas at el paso