In the frame of the LBA-Carbonsink project (Large Biosphere Atmosphere Experiment in Amazonia). Estimation of above ground biomass increment in Amazonian rain forests sites.

Supported by EU

Reforestation of degraded pastures

Reforestation with native tree species in Costa Rica at the abandoned Finca La Cerbastan in Guanacaste Costa Rica. 15 ha of  research trials with six species in different mixture and in different environment: On abandoned pastures and in young secondary vegetation.

Supported by the AVENSA-foundation, Switzerland in co-operation with CATIE, Turrialba, Costa Rica

Forest inventory and management of dry forests in Namibia

Together with the Directorate of Forestry, Ministry of Environment and Tourism, Namibia

Forest and population dynamics in La Selva, Costa Rica

Together with D.A. and D.D: Clark, S. Jose Costa Rica

Supported by Mellon foundation

Isotopes in tropical wood

Together with Kernforschungsanlage Jülich

Population dynamics of Rhizophora mangle in a mangrove forest

Together with MADAM Project, UFPA- Campus Universitário de Bragança, Braganca, Pará

supported by BMBF and CNPq

Forest dynamics, wood growth and diversity along a transect from dry forest to mountain cloud forests in the Imataca region, State Bolivar, Venezuela

Together with, Universidad Experimental de Guayana UNEG, Puerto Ordaz, Edo. Bolivar, Venezuela

Supported by Internationales Büro, DLR-BMBF (VEN 99/001) ENV

New: Certification of groundwater level changes and forest growth

Together with Forstabteilung der Landwirtschaftskammer Hannover