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Providing evidence to improve practice

Individual study: Effects of excluding goat herbivory on Acacia tortilis woodland around pastoralist settlements in northwest Kenya

Published source details

Oba G. (1998) Effects of excluding goat herbivory on Acacia tortilis woodland around pastoralist settlements in northwest Kenya. Acta Oecologica, 19, 395-404


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use wire fences within grazing areas to exclude livestock from specific forest sections Forest Conservation

A controlled study in 1986-1990 in tropical dry woodland in Kenya (Oba 1998) found that excluding goat grazing decreased the density of umbrella thorn Acacia tortilis trees but did not affect their height. The density of umbrella thorn trees was lower in the fenced than in the grazed transects (377 vs 512 trees/ha respectively), while their height was similar (2.2 and 2.5 m respectively). Umbrella thorn trees were monitored in 1990 in five wire fenced (fenced in July 1986 to exclude goats) and five grazed 200 x 20 m transects, in an area with a long history of goat and other livestock grazing.