1. Department of Plant Ecology, Bayreuth Center of Ecology and Environmental Research University of Bayreuth Bayreuth Germany
2. Department of Plant Biology and Ecology, Faculty of Biology University of Seville Seville Spain
3. School of the Environment Yale University New Haven Connecticut USA
4. Smithsonian Tropical Research Institute Balboa Panama
5. Department of Botany and Plant Pathology Oregon State University Corvallis Oregon USA
6. Departamento de Ciencias Naturales, Facultad de Ciencias y Tecnología Universidad Tecnológica de Panamá Panama Panama