Book Chapter on the role of trees in regulating soil erosion
Résultats de la recherche
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Library ResourceArticles et Livresjanvier, 2014Kenya, Afrique orientale
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Library ResourceArticles et Livresaoût, 2014France, Royaume-Uni, Kenya, États-Unis d'Amérique, Afrique orientale, Amérique septentrionale, Europe septentrionale, Europe occidentale
Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species’ threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that support computation of a range of biodiversity indicators, is necessary to enable better understanding of historical declines and to project – and avert – future declines.
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Library ResourceArticles et Livresnovembre, 2014Kenya, Afrique orientale
Wildlife populations are declining severely in many protected areas and unprotected pastoral areas of Africa.
Rapid large-scale land use changes, poaching, climate change, rising population pressures, governance, policy, economic
and socio-cultural transformations and competition with livestock all contribute to the declines in abundance. Here we
analyze the population dynamics of 15 wildlife and four livestock species monitored using aerial surveys from 1977 to -
Library ResourceDocuments de politique et mémoiresfévrier, 2014Éthiopie, Kenya, Ouganda
Ill advised, uncoordinated, and badly planned interventions have been blamed for continuing poverty and food insecurity in rangelands. Water interventions in particular have had negative impacts. Not only have these interventions failed to improve the livelihoods of people living there, but in many cases they have served to undermine them and the environment on which they depend. Rangeland development interventions have been sectoral in their approach.
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