A dense Andean forest at 3400-3750m elevation, dominated by Weinmannia mariquitae and Miconia spp. in the Colombia Parque Nacional Natural Los Nevados was studied with aerial photographs and vegetation releves. Five main land use types were distinguished: intact upper-Andean forest, upper-Andean forest with selective cutting, the "socola" system, pasture with scattered trees, and total clearings. These land use types represent increasing levels of human impact. Usually some type of wood extraction preceeds catle grazing. Implications of these results of management of the forest line vegetation are discussed.
