Abstract
Local people’s perceptions of plant species are an important source of information on species distribution and rarity, as well as long-term vegetation change. This study involves an ethnobotanical survey and the identification of potential factors that explain differences in the perceptions and valuation of woody plant species in three ethnic groups (Fulani, Mossi and Samo) of the sub-Sahel of Burkina Faso. Some 87 groups of informants from 20 villages were interviewed for this study. A species list of woody plants and their estimated abundance was categorized in terms of their uses: food, medicine, fodder, construction, energy and handicrafts. In addition, the most important species, and those considered a priority for conservation, were identified. A total of 90 woody species were mentioned in the six categories. They were from 64 genera and 32 families and sub-families, of which the Caesalpinioideae, Combretaceae, Mimosoideae and the Capparaceae dominated. In all three ethnic groups, more than 80 % of the reported species were used for energy, 60 % for medicine and 40–50 % for food. Gender was not a determinant of plant use. However, age was found to have an impact on plant knowledge in all three ethnic groups, with older people (over 50 years) reporting significantly more species than younger people (25–50 years): (U = 425, df: 15, 14, z = −4.42, p < 0.05). There was a significant difference in plant use among the three ethnic groups (ANOSIM; R = 0.64, p < 0.001), and this could be explained by differences in culture and local environmental conditions controlling species distribution and availability. Balanites aegyptiaca was the most used species by all three ethnic groups. The most important species and identified conservation priorities, from the informants’ perspective, were similar for all ethnic groups and were mainly food species with a high socioeconomic value: Vitellaria paradoxa, Adansonia digitata, Tamarindus indica, Parkia biglobosa, Lannea microcarpa and Ziziphus mauritiana. Development projects should incorporate the preferences of local people for certain species as part of the overall strategy for poverty alleviation in Burkina Faso.
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Acknowledgments
The authors thank the Friedrich-Ebert-Foundation in Germany and the Rufford Small Grants Foundation (RSG) in UK for the grant to the first author, which made this research possible. We are grateful to our colleagues who made useful comments on the preliminary version of our manuscript. Our many thanks also go to our numerous field assistants who helped in translation and the collection and identification of specimens, as well as in facilitating contacts with the local people in the study area. We are very grateful to Ms Alanna Rebelo and Mr Will Simonson for having carefully edited the English.
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Sop, T.K., Oldeland, J., Bognounou, F. et al. Ethnobotanical knowledge and valuation of woody plants species: a comparative analysis of three ethnic groups from the sub-Sahel of Burkina Faso. Environ Dev Sustain 14, 627–649 (2012). https://doi.org/10.1007/s10668-012-9345-9
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DOI: https://doi.org/10.1007/s10668-012-9345-9