1. Southern Research Station, USDA Forest Service , 4700 Old Kingston Pike, Knoxville, TN 37919 , USA
2. Smithsonian Tropical Research Institute , Apartado Postal 0843-03092, Panama City , Panama
3. Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory , 1 Bethel Valley Rd, Oak Ridge, TN 37830 , USA
4. Ecology and Conservation Biology, Texas A&M University , 534 John Kimbrough Blvd, College Station, TX 77843 , USA
5. Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, Av. Gregório Ferraz Nogueira , S/n, Bairro: José Tomé de Souza Ramos, Caixa Postal 063, CEP: 56.909-535, Serra Talhada, Pernambuco , Brazil
6. Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada , Av. Gregório Ferraz Nogueira, S/n, Bairro: José Tomé de Souza Ramos, Caixa Postal 063, CEP: 56.909-535, Serra Talhada, Pernambuco , Brazil
7. Federal University of Pernambuco, Department of Botany, Avenida Professor Moraes Rego , s/n, Cidade Universitária, CEP: 50670-901, Recife, Pernambuco , Brazil