Forest inventories are largely neglected in the debate of national parks se
lection in Guyana (and probably elsewhere). Because taxonomic data are ofte
n scant and biased towards are as of high collecting effort, large scale fo
rest inventory data can be a useful tool adding to a knowledge database for
forests. In this paper the use of forest inventories to select national pa
rks in Guyana is assessed. With the data of a large scale inventory five fo
rest regions could be distinguished and two were added on the base of exist
ing other information. Forest composition in Guyana is largely determined b
y geology at a national level and soil type at regional level. Species dive
rsity is higher in the south of Guyana, possibly due to higher disturbance
and is also higher on the better soils. It is concluded that a selection of
national parks in Guyana should include a sample of all seven regions, inc
luding as much soil variation as possible. Because of land use conflicts in
central Guyana, this area is in need of quick attention of Guyana's policy
makers.