Asexual reproduction has been observed to be more frequently associated with marginal habitats or with higher levels of disturbance. Here we examined frequencies of clonal reproduction across populations of Fagus grandifolia with varying levels of disturbance and habitat quality. We used ISSRs to identify clonal genotypes at each of five sites. Three of the sites were typical temperate habitats with relatively low densities of stems and were below 1,100 m, and two sites were above 1,370 m, possessed a high density of stems, and were characteristic of sub-alpine beech gap populations. The frequency of clonal reproduction varied substantially across sites and appears to be greater where disturbance is more severe.