Estimation of Carbon Stock Changes in the Kalikonto sub-watershed (Malang), Using Rapid Carbon Stock Appraisal (RaCSA)

1. Within 15 years, C loss for the whole watershed (23810 ha) was estimated to be 25,924 Mg yr-1 or equivalent to a yearly C loss of 1.48 Mg ha-1.

2. Carbon lost from natural forest was about 1.09 Mg ha-1 yr-1, tree plantations lost 0.25 Mg ha-1 yr-1. Carbon lost from coffee-based agroforestry systems was about 0.05 Mg ha-1 yr-1.

3. Planting more trees (damar, pinus, mahogany) in the landscape through the Reforestation Program in the 1990-2005 period was not able to replenish the C lost from the landscape, planting more trees in the landscape through agroforestry and plantation may compensate the loss of C through forest conversion.