1. CIRAD UMR SELMET- PPZS, Dakar, Senegal
2. SELMET, L’Institut Agro Montpellier, CIRAD, INRAE, Univ Montpellier, Montpellier, France
3. Centre de Suivi Ecologique, PPZS, Dakar, Senegal
4. ISRA, CRZ (Centre de Recherches Zootechniques), Dahra-PPZS, Dahra Djoloff, Senegal
5. Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
6. Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark
7. UMR SELMET, CIRAD, INRA Institut Agro, Univ Montpellier, Montpellier, France
8. UMR AMAP Univ Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, France