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Now showing items 1-10 of 18
Biomass production and economic value of Phragmites australis reedbeds in the Southern Okavango Delta, Botswana
(Global Science Books, www.globalsciencebooks.info, 2010-11-10)
Most work globally on Phragmites spp. has been done in temperate northern hemisphere localities, where winter low temperatures and short day lengths cause a seasonal decrease in growth. In this study, we report above-ground ...
Satellite based long-term assessment of rangeland condition in semi-arid areas: an example from Botswana
(Elsevier, 2010-12-14)
A methodology was devised for comparison of generalised range condition over time, irrespective of the nature of original imagery used. It was applied for range condition change mapping throughout
Botswana through 1984-2000. ...
Pollution implications of Save River water from weathering and dissolution of metal hosting minerals at Dorowa phosphate mine, Zimbabwe
(Elsevier. http://www.elsevier.com, 2010-08-20)
The study set out to determine the weathering and dissolution of metal hosting minerals at Dorowa for purposes of deducing pollution potential to the nearby Save River. Phosphate rock is mined at Dorowa for the production ...
Minerals that host metals at Dorowa Rock Phosphate Mine, Zimbabwe
(Bentham Open, 2010)
This study set out to establish the major minerals at Dorowa and determine which of those are likely to host metals that may leach into surface and groundwater. This study comes after a preliminary assessment of the water ...
Cadmium sorption by Moringa stemopetala and Moringa oleifera seed powders: Batch, time, temperature, pH and adsorption isotherm studies
(Academic Journals: http://www.academicjournals.org/, 2010-05)
There is a widespread recognition that the presence of heavy metals such as cadmium in water is hazardous to the environment and human health and their discharge into surface waters is of great concern worldwide. The use ...
Regeneration of seven indigenous tree species in a dry Afromontane forest, southern Ethiopia
(Elsevier, www.elsevier.com, 2010)
Regeneration of seven indigenous tree species having significant ecological and economic importance was investigated in the Munessa-Shashemene dry Afromontane forest (MSF), southern Ethiopia. Densities and distributions ...
Aquatic ecosystem responses to fire and flood size in the Okavango Delta: observations from the seasonal floodplains
(Springer, http://www.springer.com, 2010-07-19)
The frequency of fires in the Okavango Delta seasonal floodplains peaked at an intermediate frequency of flooding. Floodplains are commonly burnt every 3–5 years. This study showed fundamental changes in ecosystem properties ...
Tropical wetlands: seasonal hydrologic pulsing, carbon sequestration and methane emissions
(Springer, http://www.springer.com, 2010)
This paper summarizes the importance of climate on tropical wetlands. Regional hydrology and carbon dynamics in many of these wetlands could shift with dramatic changes in these major carbon storages if the inter-tropical ...
Functional conservation areas and the future of Africa's wildlife
(Wiley, 2010-11)
Ungulate populations in African conservation areas (CAs) are in widespread decline, which can largely be attributed to a lack of functionality of the area encompassed by the CAs themselves. We present evidence from a wide ...
Nutrient limitations on aboveground grass production in four savanna types along the Kalahari Transect
(Elsevier, 2010-02-19)
The Kalahari Transect (KT) is an International Geosphere–Biosphere Programme mega-transect designed
to examine hydrological and ecological patterns and processes throughout the savannas of southern
Africa. The KT traverses ...