1. INRA, BIOGECO, UMR1202, 69 Route d'Arcachon, 33612 Cestas, France
2. Université de Bordeaux, BIOGECO, UMR1202, Avenue des Facultés, 33405 Talence, France
3. Centre for Informatics Research on Complexity in Ecology, Aarhus University, Department of Bioscience, NyMunkegade 114, 8000 Aarhus C, Denmark
4. UR BIOGER, INRA, Avenue Lucien Brétignières, BP01, 78850 Thiverval-Grignon, France
5. UR MIAJ, INRA, Domaine de Vilvert, 78352 Jouy-en-Josas CEDEX, France
6. INRA, UMR 1201 DYNAFOR, F-31326 Castanet Tolosan, France
7. Scion (New Zealand Forest Research Institute), P.O. Box 29237, Christchurch 8540 New Zealand