Market Economy and the Loss of Folk Knowledge of Plant Uses: Estimates from the Tsimane’ of the Bolivian Amazon

victoria reyes -garc ı́a , v incent vadez , el izabeth byron, l il ian apaza, will iam r. leonard, eddy perez , and david wilkie Sustainable International Development Program, Heller School for Social Policy and Management, Brandeis University, Waltham, MA 02454-9110, U.S.A. (vreyes@brandeis.edu) (Reyes-Garcı́a and Vadez)/International Food Policy Research Institute, Washington, DC 20006-1002, U.S.A. (Byron)/ Protección del Medio Ambiente Tarija, Calle Alejandro del Carpio N E-0659, Casilla N 59, Bolivia (Apaza)/Department of Anthropology, Northwestern University, Evanston, IL 60208, U.S.A. (Leonard)/ Fundación para el Desarrollo de la Ecologia, Estación Biológica Tunquini, Bolivia (Pérez)/Wildlife Conservation Society, 18 Clark Lane, Waltham, MA 02451-1823, U.S.A. (Wilkie). 10 ii 05