Institution: | Departmento de Ecologia, Universidade de Brazilia, CP 04631, Brasília, DF, 70919-970,;Instituto de Pesquisa Ambiental da Amazônia, Brazilia, DF, 70865-530, Brazil,;Woods Hole Research Center, PO Box 296, Woods Hole, MA 02543, and;World Bank, Washington, DC, USA |