Browsing Okavango Research Institute (ORI) by Title

Now showing items 142-161 of 261

  • Mechanisms for biosorption of chromium(III), copper(II) and mercury(II) using water extracts of Moringa oliefera seed powder 

    Sajidu, S.M.I.; Persson, I.; Masamba, W.R.L.; Henry, E.M.T. (Academic Journals, http://www.academicjournals.org/AJB, 2008)
    In continuation of our work on heavy metal remediation using Moringa seed powder, this study examines the mechanisms of metal sorption on water extracts of Moringa oleifera (MO) seed powder using extended X-ray absorption ...

  • Methane flux measurements along a floodplain soil moisture gradient in the Okavango Delta, Botswana 

    Gondwe, M.J.; Hefter, C.; Murray-Hudson, M.; Levy, P.E.; Mosimanyana, E.; Makati, A.; Mfundisi, K.B.; Skiba, U.M. (The Royal Society, https://royalsociety.org/, 2021-09-21)
    Data-poor tropical wetlands constitute an important source of atmospheric CH4 in the world. We studied CH4 fluxes using closed chambers along a soil moisture gradient in a tropical seasonal swamp in the Okavango Delta, ...

  • Microplastic accumulation in endorheic river basins – the example of the Okavango Panhandle (Botswana) 

    Kelleher, Liam; Schneidewind, Uwe; Krause, Stefan; Haverson, Lee; Allen, Steve; Allen, Deonie; Kukkola, Anna; Murray-Hudson, Mike; Maselli, Vittorio; Franchi, Fulvio (Elsevier, https://www.elsevier.com, 2023-05-20)
    The Okavango Panhandle is the main influent watercourse of the Okavango Delta, an inland sink of the entire sediment load of the Cubango-Okavango River Basin (CORB). The sources of pollution in the CORB, and other endorheic ...

  • Minerals that host metals at Dorowa Rock Phosphate Mine, Zimbabwe 

    Meck, M.; Atlhopheng, J.; Masamba, W.; Ringrose, S.; Diskin, S. (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 ...

  • More woody plants? the status of bush encroachment in Botswana's grazing areas 

    Moleele, N.M.; Ringrose, S.; Matheson, W.; Vanderpost, C. (ScienceDirect, www.sciencedirect.com, 2002)
    the cattle-dominated grazing areas of Botswana. Bush encroachment species – for instance Acacia tortilis, A. erubescens, A. mellifera, Dichrostachys cinerea, Grewia flava, and Terminalia sericea –are increasing in cover ...

  • Nutrient limitations on aboveground grass production in four savanna types along the Kalahari Transect 

    O'Halloran, L.; Shugart, H.; Wang, L.; Caylor, K.; Ringrose, S.; Kgope, B. (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 ...

  • Okavango Delta – A Kalahari oasis under environmental threats 

    Darkoh, Michael B.K.; Mbaiwa, Joseph E. (Omics International, https://www.omicsonline.org, 2014-10-15)
    Wetlands all over the world are continuously faced with enormous environmental threats. The Okavango, a Kalahari hotspot, is not an exception. This research article provides a description of the environmental threats facing ...

  • The Okavango: whose Delta is it? 

    Magole, L.; Magole, L.I. (Elsevier, 2009-07-15)
    The Okavango Delta is amongst the largest Ramsar sites (http://www.ramsar.org/sitelist.pdf) in the world and an important wetland for community livelihoods, conservation and tourism in Botswana. Over the years, the utilization ...

  • The Okavango: whose Delta is it? 

    Magole, L.; Magole, L.I. (Elsevier www.elsevier.com/locate/pce, 2009)
    The Okavango Delta is amongst the largest Ramsar sites (http://www.ramsar.org/sitelist.pdf) in the world and an important wetland for community livelihoods, conservation and tourism in Botswana. Over the years, the ...

  • The Okavango; a river supporting its people, environment and economic development 

    Kgathi, D.L.; Kniveton, D.; Ringrose, S.; Turton, A.R.; Vanderpost, C.; Lundqvist, J.; Seely, M. (Elsevier; www.elsevier.com/locate/jhydrol, 2006)
    The Okavango basin comprises the Cuito and Cubango active catchment areas in Angola, in addition to the Kavango's Okavango non-active catchment in northern Namibia and Botswana. The Okavango River water and its ecosystem ...

  • Origin and palaeo-environments of calcareous sediments' in the Moshaweng dry valley, Southeast Botswana 

    Ringrose, S.; Kampunzu, A.B.; Vink, B.W.; Matheson, W.; Downey, W.S. (John Wiley & Sons, Ltd. http://www3.interscience.wiley.com/journal/117935722/grouphome/home.html, 2002)
    Quaternary sedimentation in the Moshaweng dry valley of southeastern Botswana is evaluated on the basis of geomorphological evolution and sedimentological analyses. Stratigraphic evidence reveals an 'upper surface (1095 ...

  • Pathways of human sprawl in wilderness buffer zones 

    Vanderpost, C. (Springer, http://www.springer.com, 2006)
    Intensification of human sprawl in buffer zones of globally important African wilderness areas is of worldwide concern. The paper identifies two major conflicting (yet potentially reconcilable) pathways of rural sprawl in ...

  • Pathways of Human Sprawl in Wilderness Buffer Zones 

    Vanderpost, C. (Population Environment; Springer Netherlands; http://www.springerlink.com/content/0t141ml76q32717m/, 2006-01)
    Intensification of human sprawl in buffer zones of globally important African wilderness areas is of worldwide concern. The paper identifies two major conflicting (yet potentially reconcilable) pathways of rural sprawl in ...

  • Perceptions of safe water and accessibility by rural farming communities residing along the fringes of the Okavango Delta 

    Ramolefhe, Galase Tshepiso; Ngwenya, Barbara Ntombi; Ama, Njoku Ola; Nnyepi, Maria S.; Chimbari, Moses John (Botswana Notes and Records;http://journals.ub.bw/index.php/bnr/, 2017-07-05)
    Globally, access to safe water for domestic use is a key social development indicator promoting health and enhancing national development. About 1 in 10 people are without access to safe water with Sub Saharan Africa facing ...

  • Phenology is the dominant control of methane emissions in a tropical non-forested wetland 

    Hefter, Carol; Gondwe, Mangaliso; Murray-Hudson, Michael; Makati, Anastacia; Lunt, Mark F.; Palmer, Paul, I.; Skiba, Ute (Springer Nature, https://www.springernature.com, 2022-01-10)
    Tropical wetlands are a significant source of atmospheric methane (CH4), but their importance to the global CH4 budget is uncertain due to a paucity of direct observations. Net wetland emissions result from complex ...

  • Physicochemical controls of diffusive methane fluxes in the Okavango Delta, Botswana. 

    Masamba, Wellington R.L.; Gondwe, Mangaliso J.; Murray-Hudson, Mike (Springer Science, https://link.springer.com, 2015)
    Atmospheric methane (CH4) is one of the three key greenhouse gases (GHGs) driving global climate change. The atmospheric concentration of CH4 has increased by about 150 % above pre-industrial levels of 400–700 ppb due to ...

  • Plant community response to loss of large herbivores differs between North American and South African savanna grasslands. 

    Koerner, Sally E.; Burkepile, Deron E.; Fynn, Richard W.S; Burns, Catherine E.; Eby, Stephanie; Govender, Navashni; Hagenah, Nicole; Matchett, Katherine J.; Wilcox, Kevin R.; Collins, Scott L.; Kirkman, Kevin P.; Knapp, Allan K.; Smith, Melinda D.; Thompson, Dave I. (Ecological Society of America; https://www.esa.org/esa/, 2014-04-01)
    Herbivory and fire shape plant community structure in grass‐dominated ecosystems, but these disturbance regimes are being altered around the world. To assess the consequences of such alterations, we excluded large herbivores ...

  • Policy-makers’ perceptions of the tourism–climate change nexus: policy needs and constraints in Botswana 

    Hambira, Wame L.; Saarinen, Jarkko (Routledge;https://www.routledge.com/, 2015-02-13)
    Tourism is a key sector for most southern African economies endowed with unique natural capital, and the industry is increasingly being used for socio-economic development and diversification of national economies in the ...

  • Political economy of integrated soil fertility management in the Okavango Delta, Botswana 

    Kolawole, Oluwatoyin Dare; Mogobe, Oarabile; Magole, Lapologang (World Academy of Science, Engineering and Technology, https://www.waset.org, 2013)
    Although many factors play a significant role in agricultural production and productivity, the importance of soil fertility cannot be underestimated. The extent to which small farmers are able to manage the fertility of ...

  • Polluter pays or polluter enriching the retailers”: the case of plastic bag levy failure in Botswana 

    Madigele, P.K.; Mogomotsi, G.E.J. (Ethiopian Journal of Environmental Studies and Management, https://www.ajol.info, 2017-05-25)
    It has been almost ten years since the introduction of plastic levy in Botswana. The levy was introduced as part of measures to combat littering of plastic bags and reduce their negative effects on the environment. The ...