Determinants of revegetation on landslide scars in an agro-based socio-ecological system in Bududa, Uganda

Landslides cause displacement or loss of plant cover, soil and other materials on slopes. Exposure of soil accelerates erosion processes thus contributing to stream sedimentation. Though playing a crucial role in stabilising scars there is limited understanding of the plant species colonisation process. This study aimed at examining the determinants and status of plant revegetation on a recent landslide scar in Bududa on Mt Elgon in Uganda. Field investigations involved set up of quadrats on the one-year-old landslide scar in Bunakasala in Bushika. Plants were sampled, counted and identified from established quadrats. The morphological characteristics of the scar and species were also recorded. Results indicated that plant regeneration on the scar started within a short period of six months. A total of over 39 pioneer plant species were recorded. Most of these could have germinated from the seeds in the soil pool. The distribution pattern of the plant species was regular as determined using the Morista’s index. Plant cover is very important in stabilising the soil against erosion hence fast recovery of the disturbed area. For initial healing process of the scars such pioneer plants should be left intact and human activities with least impact promoted during the early stage of recovery.   Key words: Landslide scar, plant species, revegetation, Bududa, Uganda.