Résultats de la recherche

1. Library Resource

   

   Spatial Variation in Tree Density and Estimated Aboveground Carbon Stocks in Southern Africa

   Articles et Livres

   mars, 2016

   Angola, Botswana, Mozambique, Malawi, Zambie, Zimbabwe, Afrique orientale, Afrique centrale, Afrique australe

   utilisation des terres

   Variability in woody plant species, vegetation assemblages and anthropogenic activities derails the efforts to have common approaches for estimating biomass and carbon stocks in Africa. In order to suggest management options, it is important to understand the vegetation dynamics and the major drivers governing the observed conditions. This study uses data from 29 sentinel landscapes (4640 plots) across the southern Africa. We used T-Square distance method to sample trees.

2. Library Resource

   

   The Economics of Land Degradation in Africa_Benefits of Action Outweigh the Costs_A complementary report to the ELD Initiative

   Documents et rapports de conférence

   décembre, 2015

   Afrique septentrionale, Égypte, Maroc, Soudan, Tunisie, Afrique orientale, Burundi, Djibouti, Érythrée, Éthiopie, Kenya, Madagascar, Malawi, Mozambique, Rwanda, Soudan du Sud, République-Unie de Tanzanie, Zambie, Zimbabwe, Afrique centrale, Angola, Cameroun, République centrafricaine, Tchad, Congo, République démocratique du Congo, Gabon, Afrique australe, Botswana, Lesotho, Namibie, Afrique du Sud, Eswatini, Afrique occidentale, Bénin, Burkina Faso, Ghana, Guinée, Côte d'Ivoire, Libéria, Mali, Mauritanie, Niger, Nigéria, Sénégal, Sierra Leone, Togo

   Dégradation et Régime des Terres

   Terres, changement climatique et environnement

   environnement

   désertification

   dégradation des terres

   Land degradation and desertification are among the biggest environmental challenges of our time. In the last 40 years, we lost nearly a third of the world’s arable farmland due to erosion, just as the number of people to be fed from it almost doubled. That’s why the UN General Assembly declared 2015 as the International Year of Soils. And the good news is that this new report shows that while Africa remains the most severely a«ected region, the benefit of taking action across the continent outweighs the cost of implementing it: not just by a little, but by a factor of seven.
   

3. Library Resource

   

   Congruence of appropriation and provision in collective water provision in Central Namibia

   Articles et Livres

   décembre, 2016

   Namibie, Afrique australe

   Pâturages, terres arides et pastoralisme

   réforme foncière

   parcours

   Achieving cooperation in natural resource management is always
   a challenge when incentives exist for an individual to maximise her short term
   benefits at the cost of a group. We study a public good social dilemma in water
   infrastructure provision on land reform farms in Namibia. In the context of the
   Namibian land reform, arbitrarily mixed groups of livestock farmers have to share
   the operation and maintenance of water infrastructure. Typically, water is mainly
   used for livestock production, and livestock numbers are subject to high fluctuations