1. Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ 08854
2. Department of Physics, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
3. Department of Plant Biology, University of Campinas, Campinas 13083-862, Brazil
4. Graduate Program in Ecology, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
5. CRETUS, Non-Linear Physics Group, Faculty of Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
6. Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824