, Volume 56, Issue 1, pp 3–7

Thornbush invasion in a savanna ecosystem in eastern Botswana

  • J. A. van Vegten

DOI: 10.1007/BF00036129

Cite this article as:
van Vegten, J.A. Vegetatio (1984) 56: 3. doi:10.1007/BF00036129


The paper describes the thornbush invasion (bush encroachment) found in the savanna at Olifants Drift in eastern Botswana. Overgrazing by cattle is responsible for the opening up of the grass sward and has enabled woody species to establish. A quantification of this process between 1950 and 1975 in an area of ca. 100 km2 is given in terms of plant density as well as aboveground biomass. The loss of herbaceous biomass which generally accompanies bush encroachment and the possibilities for pasture restoration are mentioned.


AfricaBiomass assessmentBush encroachmentOvergrazingRegressive SuccesionSavanna

Copyright information

© Dr W. Junk Publishers 1983

Authors and Affiliations

  • J. A. van Vegten
    • 1
  1. 1.HeilooThe Netherlands