1. Department of Forest Sciences, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias, 11, Piracicaba, São Paulo 13418-900, PO Box 9, Brazil.
2. Federal University of São Carlos, Center of Nature Sciences, Rua Serafim Libaneo, 04, Campina do Monte Alegre, São Paulo 18245-970, PO Box 64, Brazil.
3. HJ Andrews Experimental Forest and Oregon State University, PO Box 300, Blue River, OR 97413, USA.