Water acquisition patterns of two wet tropical canopy tree species of French Guiana as inferred from H218O extraction profiles Damien Bonal, Claire Atger, Têté Séverien Barigah, André Ferhi, Jean-Marc Guehl and Bruno Ferry Ann. For. Sci., 57 7 (2000) 717-724 DOI: 10.1051/forest:2000152