The paper analyzes land use changes, notably cropland expansion, in SE-Niger from the mid-1980s to 2011. It scrutinizes land use trajectories and investigates how cultivation shifts between dune landscapes and valleys (bas-fonds) in response to climate, population pressure, and sociocultural opportunities, combining lenses rooted in land change science and the notions of double exposure and human-environmental timelines. Specifically, the interest is directed towards exploring the value of different methods of land use data harvesting.
The Sahel has been the focus of scientific interest in environmental-human dynamics and interactions. The objective of the present study is to contribute to the recent debate on the re-greening of Sahel. The paper examines the dynamics of barren land in the Sahel of Burkina Faso through analysis of remotely-sensed and rainfall data from 1975–2011. Discussions with farmers and land management staff have helped to understand the anthropogenic efforts toward soil restoration to enable the subsistence farming agriculture.
Climatic stress and anthropogenic disturbances have caused significant environmental changes in the Sahel. In this context, the importance of soil is often underrepresented. Thus, we analyze and discuss the interdependency of soil and vegetation by classifying soil types and its woody cover for a region in the Senegalese Ferlo. Clustering of 28 soil parameters led to four soil types which correspond with local Wolof denotations: Dek, Bowel, Dior and Bardial.
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.
Meeting Name: African Forestry and Wildlife Commission
Meeting symbol/code: FO:AFWC/2016/4.1
Session: Sess. 20
The First International Workshop on Community Forestry in Africa was held in the Gambia in February 1999. It began the process of bringing together all of the African experiences in community-based natural resource management. Until the Gambia workshop, those looking for documentation of existing initiatives would have looked towards Asia for information about best practices and experience in participatory forest management.
A short eight-teen-page report where the author describes the overall situation of fuelwood data in Chad. It is organised in three main parts; the first part is a broad description of the country's characteristics followed by a second part describing the country's vegetation and forest cover. Moreover, the author pays some attention to the trees outside forests and finishes with a brief conclusion.
Meeting symbol/code: COFO 1999 REP
Water for agriculture draws on a range of sources - from naturally available water bodies to water supply infrastructure. In sub-Saharan Africa, only a very small percentage of arable land is irrigated. Most farmers produce food under rainfed conditions. In 1995, for instance, 89 percent of cereal production in sub-Saharan Africa was delivered from rainfed agriculture, compared to 58 percent in the West Asia and Northern Africa region (InterAcademy Council, 2004). The situation in the Sahel is very much in line with this trend.
L’impact de la variabilité et du changement climatiques sur la production agricole et la gestion des ressources naturelles est en cours d’examen approfondi par les scientifiques à tous les niveaux, tant dans les pays en développement que dans les pays développés. Un appel a été lancé pour des innovations technologiques et scientifiques destinées à atténuer les effets du changement climatique en vue de réaliser l’un des objectifs majeurs du Millénaire pour le développement (OMD) d’ici 2015 – éradiquer l’extrême pauvreté et la faim.