摘要：Rungwe is among tropical rift afromontane forests that have been negatively affected by different kinds of human activities. It was determined the effects of anthropogenic disturbance on the plant species composition, richness, diversity and diversity in the western parts of Rungwe Forest Reserve where data were collected using randomly established sampling plots. It was recorded a total of 99 plant species in 47 families from the study forest. Moderately disturbed site recorded a significantly higher species richness and diversity than it was in the least and highly disturbed habitats. A significantly higher density of trees (810 stems /ha) was recorded in moderately disturbed site than it was in the least disturbed (567 stems/ha) and the highly disturbed sites (83 stems/ha). Data from this study provides evidence that disturbance has negatively impacted the plant species composition, richness, diversity and density in the natural habitat where a number of plant species have disappeared under heavily disturbed conditions within Rungwe Forest. Because Rungwe Forest Reserve represents a few existing fragile afromontane ecosystems affected by anthropogenic activities its protection contributes to sustainable biodiversity conservation
