1. Forest Ecology and Forest Management Group; Wageningen University; P.O. Box 47 6700 AA Wageningen The Netherlands
2. Instituto Boliviano de Investigación Forestal (IBIF); P.O. Box 6204 Santa Cruz Bolivia
3. Resource Ecology Group; Wageningen University; P.O. Box 47 6700 AA Wageningen the Netherlands
4. School of Natural Sciences & Mathematics; Ferrum College; 212 Garber Hall Ferrum VA 24088 USA
5. School of Biological and Conservation Sciences; University of KwaZulu-Natal; ZA-3209 Scottsville South Africa
6. Department of Biology; University of Florida; P.O. Box 118526 Gainesville FL 32611 USA