La pandémie de Covid-19 est sans aucun doute l’événement majeur de santé publique qui a marqué les êtres humains, les sociétés et les esprits dans le monde entier et particulièrement l’Afrique. Tous les gouvernements ont adopté des mesures de santé publique, notamment le confinement et d’autres mesures exceptionnelles dans le cadre de l’état d’urgence sanitaire, pour réduire la propagation du virus. La chute soudaine de l’activité humaine a des conséquences sur l’environnement, et l’utilisation/exploitation des ressources naturelles, notamment la pêche.
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Library ResourceReports & ResearchMarch, 2021Africa, Djibouti, Kenya, Ghana, Mauritania, Nigeria, Senegal
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Library Resource
Land Use Policy Volume 59
Peer-reviewed publicationDecember, 2016Burkina Faso, Central African Republic, Cameroon, Algeria, Eritrea, Ethiopia, Mali, Mauritania, Niger, Nigeria, Sudan, Senegal, South Sudan, ChadAfter the severe droughts in the 1970s and 1980s, and subsequent debates about desertification, analyses of satellite images reveal that the West African Sahel has become greener again. In this paper we report a study on changes in tree cover and tree species composition in three village landscapes in northern Burkina Faso, based on a combination of methods: tree density change detection using aerial photos and satellite images, a tree species inventory including size class distribution analysis, and interviews with local farmers about woody vegetation changes.
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Library ResourcePeer-reviewed publicationDecember, 2014Algeria, Sudan, Burkina Faso, Nigeria, Mauritania, Chad, Mali, Cameroon, Senegal, Central African Republic, South Sudan, Ethiopia, Niger, Eritrea, Africa
Crown diameter and tree density were measured in 52 communities in the Sudan-Sahel using satellite imagery to determine the relationships between rainfall and distance from community center to crown size diameter and tree density. As distance from the community center increased, tree density and crown diameter decreased. As rainfall increased, tree density decreased while crown diameter increased. Distance from the community center is a proxy for age since urbanization and our results indicate that older parts of communities show longer and more consistent tree management.
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Library ResourceJournal Articles & BooksDecember, 1999Sudan, Burkina Faso, Nigeria, Mauritania, Mali, Sweden, Germany, Indonesia, Ethiopia, Pakistan, Niger, Cameroon, Kenya, Republic of Korea, Malaysia, Somalia, Italy, Tanzania, India, Senegal, Chad, France
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