in any case old trees are generally more valuable for biodiversity than young trees cf above although for grounddwelling fungi age may be less important than continuous presence of the associated tree species such information as well as data on stand age or development class will often be available from forest inventories thereby allowing a linkage to data on tree biomass and carbon stocks annex i lists different forest types of european conservation interest of which are represented in the eu members of the nordic countries and seven of these are listed as priority habitat types table