1. Univ. of the Basque Country; Dep. of Geodynamics, Hydrogeology Group; 48940 Leioa Basque Country (Spain)
2. Spatial Sciences Lab.; Texas A&M Univ.; College Station TX
3. Univ. of Toulouse; INPT, UPS, Functional Ecology and Environment Lab. (EcoLab); Avenue de l'Agrobiopole, 31326 Castanet Tolosan Cedex France
4. CNRS, EcoLab; 31326 Castanet Tolosan Cedex France
5. UFZ-Helmholtz-Centre for Environmental Research, Dep. of Computational Landscape Ecology; Leipzig Germany