Browsing by Author "Huntsman-Mapila, P."
Now showing items 1-16 of 16
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Characterization of arsenic occurrence in the water and sediments of the Okavango Delta, NW Botswana
Huntsman-Mapila, P.; Mapila, T.; Letshwenyo, M.; Wolski, P.; Hemond, C. (Elsevier Science B.V. Amsterdam; http://www.elsevier.com/wps/find/journaldescription.cws_home/768/description#description, 2006)Detailed chemical analyses were performed on surface water, groundwater and sediment samples collected from the Okavango Delta between February and November 2003 in order to examine the distribution and geochemistry ... -
Cryptic indicators of provenance from the geochemistry of the Okavango Delta sediments, Botswana
Huntsman-Mapila, P.; Kampunzu, A.B.; Vink, B.; Ringrose, S. (Elsevier; http://www.elsevier.com/wps/find/journaldescription.cws_home/503361/description#description, 2005)[Please note that chemical formulae do not display properly]:The siliciclastic sediments of the Okavango inland Delta of northwest Botswana have a modal composition of quartz arenites and result from a complex history, ... -
Cryptic indicators of provenance from the geochemistry of the Okavango Delta sediments, Botswana
Huntsman-Mapila, P.; Kampunzu, A.B.; Ringrose, S.; Vink, B. (Elsevier www.elsevier.com/locate/sedgeo, 2005)The siliciclastic sediments of the Okavango inland Delta of northwest Botswana have a modal composition of quartz arenites and result from a complex history, including transport by river and deposition in a nascent rift ... -
Deltamethrin in sediment samples of the Okavango Delta, Botswana
Daka, P.S.; Obuseng, V.C.; Torto, N.; Huntsman-Mapila, P. (Water SA Pretoria; Water Research Commission; http://www.wrc.org.za/, 2006-10)Deltamethrin concentrations were determined in 35 sediment samples collected from three different habitats: channel, lagoon and pool sites from Xakanaxa in the Okavango Delta, NW Botswana. The samples were Soxhlet-extracted ... -
Deltamethrin in sediment samples of the Okavango Delta, Botswana
Daka, P.S.; Obuseng, V.C.; Torto, N.; Huntsman-Mapila, P. (South African Water Research Commission http://www.wrc.org.za, 2006)Deltamethrin concentrations were determined in 35 sediment samples collected from three different habitats: channel, lagoon and pool sites from Xakanaxa in the Okavango Delta, NW Botswana. The samples were Soxhlet-extracted ... -
Headspace solid phase microextraction in the determination of pesticides in water samples from the Okavango Delta with gas chromatography-electron capture detection and time-of-flight mass spectrometry
Mmualefe, L.C.; Torto, N.; Huntsman-Mapila, P.; Mbongwe, B. (Elsevier Ltd, http://www.elsevier.com/locate/microc, 2009)Headspace solid phase microextraction (HS-SPME) was optimized for the analysis of pesticides with gas chromatography electron capture detection (GC-ECD) and high-resolution mass spectrometry. Factors influencing the ... -
Indicators of desiccation-driven change in the distal Okavango Delta, Botswana
Ringrose, S.; Vanderpost, C.; Matheson, W.; Wolski, P.; Huntsman-Mapila, P.; Murray-Hudson, M.; Jellema, A. (Elsevier Ltd; www.elsevier.com/locate/jaridenv, 2007-01)This work seeks to determine whether riparian woody plant variables respond to drying and salinity regimes in the semi-arid distal Okavango Delta, northern Botswana. Structural and compositional variables were obtained ... -
Islands in the Okavango delta as sinks of water-borne nutrients
Wolski, P.; Murry-Hudson, M.; Fernkvist, P.; Liden, A.; Huntsman-Mapila, P.; Ramberg, L. (Botswana Society, 2005)Groundwater under islands in the Okavango Delta is a known sink of inorganic dissolved minerals, preventing salinisation of this virtually enclosed evaporation-dominated hydrological system. The Okavango Delta is an ... -
Lake Ohrid, Albania, provides an exceptional multi-proxy record of environmental changes during the last glacial-interglacial cycle
Lezine, A-M.; von Grafenstein, U.; Andersen, N.; Belmecheri, S.; Bordon, A.; Caron, B.; Cazet, J.-P.; Erlenkeuser, H.; Fouache, E.; Grenier, C.; Huntsman-Mapila, P.; Hureau-Mazaudier, D.; Manelli, D.; Mazaud, A.; Robert, C.; Sulpizio, R.; Tiercelin, J.-J.; Zanchetta, G.; Zeqollari, Z. (Elsevier, 2010-01-11)Multi-proxy analyses on core JO2004-1 recovered from Lake Ohrid (40°55.000 N, 20°40.297E, 705 m a.s.l.) provide the first environmental and climate reconstruction in a mountainous area in Southern Europe over the last ... -
Origins of strandline duricrusts around the Makgadikgadi Pans (Botswana Kalahari) as deduced from their chemical and isotope composition
Ringrose, S.; Harris, C.; Huntsman-Mapila, P.; Vink, B.W.; Diskins, S.; Vanderpost, C.; Matheson, W. (Elsevier www.elsevier.com/locate/sedgeo, 2009)Trace elements togetherwith some O and C isotope analysiswere undertaken on duricrust strandline deposits in the palaeo-Makgadikgadi sub-basin (PMSB) to provide insight into palaeo-climatic conditions through the interpretation ... -
Sedimentological and geochemical evidence for palaeo-environmental change in the Makgadikgadi subbasin, in relation to the MOZ rift depression, Botswana
Ringrose, S.; Huntsman-Mapila, P.; Kampunzu, A.B.; Downey, W.; Coetzee, S.; Vink, B.W.; Matheson, W.; Vanderpost, C. (Elsevier www.elsevier.com/locate/palaeo, 2005)This work considers new evidence for palaeo environmental change taking place during the Pleistocene in northern Botswana. Duricrusted strandlines along the northeastern margin of Sua Pan provide palaeo-environmental data ... -
Use of remotely sensed data in the analysis of soil-vegetation changes along a drying gradient peripheral to the Okavango Delta, Botswana
Ringrose, S.; Jellema, A.; Huntsman-Mapila, P.; Baker, L.; Brubaker, K. (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
Huntsman-Mapila, P.; Ringrose, S.; Downey, W.S.; Modisi, M.; Coetzee, S.H.; Tiercelin, J-J.; Kampunzu, A.B.; Vanderpost, C. (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
Huntsman-Mapila, P. (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 ... -
Use of the geochemical and biological sedimentary record in establishing palaeo-environments and climate changein the Lake Ngami basin, NW Botswana
Huntsman-Mapila, P.; Ringrose, S.; Mackay, A.W.; Downey, W.S.; Modisi, M.; Coetzee, S.H.; Tiercelin, J.-J.; Kampunzu, A.B.; Vanderpost, C. (Elsevier, www.sciencedirect.com, 2006)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 and TL methods. Certain units in the profile were found to be diatom rich ... -
Vegetation cover trends along the Botswana Kalahari transect
Ringrose, S.; Matheson, W.; Wolski, P.; Huntsman-Mapila, P. (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 ...