However, to avoid too few data points per category, it was necessary to group selected forest types into broader units, mainly representing older forests with various main dominating tree species, rich forest types (based on ground vegetation criteria), and coastal forest. For these broader units it was possible to collate data on tree biomass from the forest inventory and use this as a basis for calculating carbon stocks and changes in these stocks between two successive inventory cycles. A brief summary of the results is given in chapter 6.2.