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By: Ranvaud, R. - Freitas, K. C. De - Bucher, Enrique H. - Dias, H. S. - Avanzo, V. C. - Alberts, C. C.Type: ArticleIn: Instituto Internacional de EcologiaVolume:Series:Issue:Date: 2001-11-01Page Range:Publication Info: Instituto Internacional de Ecologia 2001-11-01Subjects: