An approach for monitoring environmental impacts after tsetse control in eastern Africa

Maitima Joseph, Toutain Bernard, Njuguna Evanson, Wilson Cathleen. 2003. An approach for monitoring environmental impacts after tsetse control in eastern Africa. . Pretoria : ISCTRC, 13 p. International Scientific Council for Trypanosomiasis Research and Control. 27, Pretoria, Afrique du Sud, 29 Septembre 2003/3 Octobre 2003.

Résumé : The most effective means to control trypanosomosis has been to reduce the population of the insect vectors that transmit the pathogenic trypanosomes to livestock and people. Many approaches have been applied to control the vector including vegetation clearing, bush burning, ground and aerial spraying and recently use of traps and targets. There are direct and indirect environmental impacts associated with tsetse control. Indirect impacts are dominated by the effect of increased human activities in the tsetse and trypanosomosis controlled areas. Tsetse control allows human occupation and one of the consequences is a rapid increase in farming, vegetation clearing, hunting of wild animals, and ploughing. These activities modify the ecosystems. Although impacts of tsetse control on the environmental have been known to exist for quite some time research to analyse the nature and ways to mitigate these impacts has just begun. There is therefore a general lack of methodologies to guide the analysis of the impacts especially the indirect impacts whose importance has been realized much more recently. This paper discusses an approach for identifying the impacts and suggests ways to conduct monitoring of the changes with a view of providing an early warning for which negative impacts can be reduced. The starting point in environmental impact assessment is to develop a baseline data upon which changes in various environmental parameters can be deciphered. The entry point is land use and land cover analysis at farm and village level. The next is to scale up the village level analysis into landscape level. Methodologies used combine ground surveys, remote sensing analysis to produce land use and land cover maps at different scales, reconstruction of historical changes from the communities using questionnaires and an assessment of changes in natural resources from GPS referenced plots. Results include maps of land use and land cover, distribution of natural resources, temporal variations in various environmental and socio-economic parameters in the surrounding areas. Information from these analyses will be used to increase awareness among the farmers and extension officers on the environmental effects of land use changes and how the affects could be monitored to reduce negative impacts.

Classification Agris : L72 - Organismes nuisibles des animaux

Auteurs et affiliations

• Maitima Joseph, ILRI (KEN)
• Toutain Bernard, CIRAD-EMVT-ECONAP (KEN)
• Njuguna Evanson, ILRI (KEN)
• Wilson Cathleen, ILRI (KEN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/577267/)

Métriques

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