By Girma Shumi and colleagues
The following is the first of a series of upcoming summaries of preliminary findings from our ERC funded research. Details are subject to change.
Maintaining biodiversity is a global challenge. Some scientists have argued for strictly protected forest areas, while others have suggested that farmland also can have conservation value. To assess the conservation value of farmland and forest for woody species diversity in southwestern Ethiopia, we investigated six kebeles in Jimma Zone. We identified woody plant species in 78 randomly selected 20 m x 20 m sample plots in forest and homegardens; and in 72 randomly selected 1 ha sites in arable land and pastures. We found 96 and 122 plant species in forest and farmland, respectively. In forest, woody plant composition was affected by coffee management practices, current and historical distance to farmland, and the effort required by local people to reach a given site (so-called “cost distance”). Mean species richness ranged from 13 at the forest edge to 20 in forest interior. In farmland, woody plant composition was influenced by the amount of conserved forest, both within the sampled site and in its surroundings. In farmland, woody plant species richness did not differ between land uses (15 in pastures, 16 in teff, 18 in maize, 19 in other crops). Our findings confirm that the cultural landscape benefits not only food production but also biodiversity conservation. Hence, considering the entire landscape mosaic – and not only the forests themselves – should be an important priority in future conservation initiatives.
Some further details are available in the presentation below.