Browsing Research articles (ORI) by Title
Now showing items 233-252 of 261
-
Transactional sex relations among tertiary education students in the urban-village of Maun, Botswana
(Botswana Notes and Records;http://journals.ub.bw/index.php/bnr/, 2017-07-05)In southern Africa, multiple factors in given societal contexts motivate transactional sexual relations among women and men. The purpose of this study is to assess socio-economic and cultural factors that influence ... -
Tree–grass competition along a catenal gradient in a mesic grassland, South Africa
(Wiley Online Library; https://onlinelibrary.wiley.com, 2014-03-03)The interaction, both above and belowground, between tree saplings and the surrounding grass sward is dependent on solar radiation, temperature, rainfall, soil depth, tree species and sward composition. These factors, ... -
The tropical African mercury anomaly: lower than expected mercury concentrations in fish and human hair
(Elsevier, 2011-02-20)Mercury is a neurotoxin and global pollutant, and wetlands and newly flooded areas are known to be sites of enhanced production of monomethylmercury, the form of mercury that is readily biomagnified in aquatic food chains ... -
The tropical African mercury anomaly:lower than expected mercury concentrations in fish and human hair
(Elsevier, 2011)Mercury is a neurotoxin and global pollutant, and wetlands and newly flooded areas are known to be sites of enhanced production of monomethylmercury, the form of mercury that is readily biomagnified in aquatic food chains ... -
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 ... -
Twenty reasons why local knowledge will remain relevant to development
(Taylor & Francis; https://www.tandfonline.com/, 2015-10-05)Local knowledge has continued to gain popularity among development practitioners in the last four decades. However, the future of local knowledge seems hazy to some academics and researchers, perhaps due to the methodological ... -
Use of image processing and GIS techniques to determine the extent and possible causes of land management/fenceline induced degradation problems in the Okavango area, northern Botswana
(Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, 1997)Attention worldwide has been focused on the need to assess the appropriateness of land management strategies especially where these occur near sensitive areas of wildlife habitat. This work considers the use of mainly ... -
Use of remotely sensed data in the analysis of soil-vegetation changes along a drying gradient peripheral to the Okavango Delta, Botswana
(Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, 2005-10-10)This work determines the value of remotely sensed imagery in developing drying impacts which occur as a result of internal and/or external factors in the Okavango catchment. Three sites provide a preview of the consequences ... -
Use of the geochemical and biological sedimentary record in establishing palaeo-environments and climate change in the Lake Ngami basin, NW Botswana
(Elsevier; http://www.elsevier.com/wps/find/journaldescription.cws_home/865/description#description, 2007-02-07)[Please note chemical formulae do not display correctly in this abstract]. Sediment samples from a continuous 4.6m profile in the dry bed of Lake Ngami in NW Botswana were analysed for geochemistry and dated using both 14C ... -
Use of the geochemical and biological sedimentary record in establishing palaeo-environments and climate change in the Lake Ngami basin, NW Botswana
(Elservier, www.elsevier.com, 2006)Sediment samples from a continuous 4.6 m profile in the dry bed of Lake Ngami in NW Botswana were analysed for geochemistry and dated using both 14C and TL methods. Certain units in the profile were found to be diatom rich ... -
Using population parameters to separate fish stocks in the Okavango delta fishery: A preliminary assessment
(Botswana Society, 2005)Populations of three cichlid species from the upper and lower Okavango Delta were compared in terms of biological population parameters, in order to investigate whether the fish species of the Delta consist of one continuous, ... -
Utilisation of local knowledge in household adaptation to malaria endemicity in the Okavango Delta, Botswana
(University of Botswana, www.ub.bw, 2018-06)Malaria is a persistent health challenge in developing countries. The African continent is the most affected, with nearly 90% of malaria related mortality in the world. In Botswana, malaria is endemic in the northern region ... -
Variation in assemblages of small fishes and microcrustaceans after inundation of rarely flooded wetlands of the lower Okavango Delta, Botswana
(Springer, www.springer.com, 2013-09-30)Water extraction from floodplain river systems may alter patterns of inundation of adjacent wetlands and lead to loss of aquatic biodiversity. Water reaching the Okavango Delta (Delta), Botswana, may decrease due to excessive ... -
Variation of physico-chemical parameters along a river transect through the Okavango Delta, Botswana
(Tailor and Francis Online; https://www.tandfonline.com, 2016-06-07)The Okavango Delta depends on water quantity and quality to sustain its ecosystem services. Whereas many studies have been carried out on its hydrology, few have been done on water quality in the delta. Water pH, electrical ... -
Vegetation cover trends along the Botswana Kalahari transect
(Elsevier; www.elsevier.com/locate/jaridenv, 2003)Vegetative response aspects of climate change studies include the determination of vegetation cover changes across climatic gradients. Vegetation characteristics and soil moisture measurements were obtained from four ... -
A vegetation-based hierarchical classification for seasonally pulsed floodplains in the Okavango Delta, Botswana
(Taylor & Francis, http://taylorandfrancis.com, 2011-12-11)A classification scheme is presented for seasonal floodplains of the Boro-Xudum distributary of the Okavango Delta, Botswana. This distributary is subject to an annual flood-pulse, the inundated area varying from a mean ... -
Water balance and infiltration in a seasonal floodplain in the Okavango Delta, Botswana
(Springer link, http://link.springer.com, 2006)Water balance in a seasonal floodplain in the Okavango Delta, Botswana was determined for three years (1997–1999). There was no surface outflow, and infiltration to ground water was very large (4.7–9.7 m during 90–175 days ... -
Water balance and variations of nutrients and major solutes along a river transect through the Okavango Delta, Botswana
(Botswana Notes and Records; http://journals.ub.bw/index.php/bnr/, 2017-07-05)Wetland goods and services provide a means of survival for many riparian rural communities in developing countries, particularly in the Sub-Saharan Africa. To sustain the provision of goods and services for human use, ... -
Water flow dynamics in the Okavango River Basin and Delta - a prerequisite for the ecosystems of the Delta
(Elsvier, www.elsevier.com, 2003-09-08)As part of the EU-funded project ‘Water and Ecosystem Resources in Regional Development––Balancing Societal Needs and Wants and Natural Resources Systems Sustainability in International River Basin Systems’ (WERRD) ... -
Water quality dynamics in the Boro-Thamalakane-Boteti river system, northern Botswana
(Tailor and Francis Online; https://www.tandfonline.com, 2014-11-11)The quality of water in aquatic systems is subject to temporal and spatial variations due to varying effects of natural and anthropogenic factors. This study assessed the dynamics of water ...