Descubre y comparte nuestro conocimiento público

Se han encontrado 62 recursos

Resultados de búsqueda

Correlations between average pasture production and average annual rainfall in the Mediterranean Basin and the African Sahelo - Sudanian Zone.


Houerou, H.N. leHoste, Christian H.[Rangeland production and annual rainfall relations in the Mediterranean Basin and in the African Sahelo-Sudanian zone]Rangeland production and annual rainfall relations in the Mediterranean Basin and in the African Sahelo-Sudanian zone

Transhumance, the seasonal movement of herds occurring between two points and following precise routes repeated each year, is practiced on a broad scale in the open field areas of Tigray (North Ethiopia). This article presents a characterization of the practice, factors that explain its magnitude...


Nyssen, JanDescheemaeker, KatrienZenebe, A.Poesen, J.Deckers, J.Haile, M.[Transhumance in the Tigray highlands (Ethiopia)]Transhumance in the Tigray highlands (Ethiopia)

Fragmentation of the ecosystems of the earth into spatially isolated units has emerged as a primary component of global change. Often, fragmentation results from actions that are intended to enhance human livelihoods and well-being; however, there are often costs to ecosystems and human economies...


Hobbs, N.T.Galvin, K.A.Stokes, C.J.Lackett, J.M.Ash, Andrew J.Boone, Randall B.Reid, Robin S.Thornton, Philip K.[Fragmentation of rangelands: implications for humans, animals, and landscapes]Fragmentation of rangelands: implications for humans, animals, and landscapes

Twenty-five rangeland sites were monitored over two decades (1984–2006) first to assess the impact of the 1983–1984 droughts on fodder resources, then to better understand ecosystem functioning and dynamics. Sites are sampled along the south–north bioclimatic gradient in Gourma (Mali), within thr...


Hiernaux, Pierre H.Y.Mougin, E.Diarra, L.Soumaguel, N.Lavenu, F.Tracol, Y.Diawara, M.[Sahelian rangeland response to changes in rainfall over two decades in the Gourma region, Mali]Sahelian rangeland response to changes in rainfall over two decades in the Gourma region, Mali

Wildlife and pastoral peoples have lived side-by-side in the Mara ecosystem of south-western Kenya for at least 2000 years. Recent changes in human population and landuse are jeopardizing this co-existence. The aim of the study is to determine the viability of pastoralism and wildlife conservatio...


Lamprey, R.H.Reid, Robin S.[Expansion of human settlement in Kenya's Maasai Mara: What future for pastoralism and wildlife?]Expansion of human settlement in Kenya's Maasai Mara: What future for pastoralism and wildlife?

The Borana rangelands occur in a semi-arid area in southern Ethiopia, characterized by extensive livestock production. The area is a valuable source of livestock that generates income and livelihoods for large numbers of rural dwellers, and export earnings for Ethiopia's fragile economy. Desp...


Kamara, A.Kirk, M.Swallow, B.M.[Property rights and land use change: Implications for sustainable resource management in Borana, southern Ethiopia]Property rights and land use change: Implications for sustainable resource management in Borana, southern Ethiopia

1. growth and nutrient-uptake responses of annual rangeland to defoliation were studied at 13 sandy range sites located across the Sahelian zone of mali between 1977 and 1989. 34 clipping experiments (site-years) were conducted using identical treatment designs with respect to the timing and freq...


Hiernaux, Pierre H.Y.Turner, M.D.[The effect of clipping on growth and nutrient uptake of Sahelian annual rangelands]The effect of clipping on growth and nutrient uptake of Sahelian annual rangelands

The selective use by cattle of range resources in the Sahel was assessed in terms of quantity and nutritional quality of the herbage grazed and diet selected. Peak standing crop was 1951 kg ha -1 dry matter (DM) with 47.9 kg nitrogen (N) ha-1 and 7.4 kg phosphorus (P) ha -1. Esophageally fistulat...


Ayantunde, Augustine A.Hiernaux, Pierre H.Y.Fernández Rivera, S.Keulen, H. vanUdo, H.M.J.[Selective grazing by cattle on spatially and seasonally heterogenous rangeland in Sahel]Selective grazing by cattle on spatially and seasonally heterogenous rangeland in Sahel

The effects of 4 years grazing by sheep and goats at various stocking rates on soil surface features, bulk density, organic C, N and P contents and pH were investigated in Sadore, Niger. Studies were also conducted in a fallow subjected to 9 years of intensive grazing. Although grazing reduced (P...


Hiernaux, Pierre H.Y.Bielders, Charles L.Valentin, ChristianBationo, B. AndréFernández Rivera, S.[Effects of livestock grazing on physical and chemical properties of sandy soils in Sahelian rangelands]Effects of livestock grazing on physical and chemical properties of sandy soils in Sahelian rangelands

East Africa contains areas with some of the greatest large mammal biodiversity on the planet. These areas are key natural resources for the economic development of the region. They are also key areas for pastoralists who have co-existed with wildlife for millennia. Increasing populations, conflic...


Thornton, Philip K.Galvin, K.A.Boone, Randall B.[An agro-pastoral household model for the rangelands of East Africa]An agro-pastoral household model for the rangelands of East Africa

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso