A baseline assessment of selected seasonal pans in the Kruger National Park, South Africa

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dc.contributor.advisor Prof. Victor Wepener en_US
dc.contributor.author Taylor, Shaun
dc.date.accessioned 2012-06-07T10:12:06Z
dc.date.available 2012-06-07T10:12:06Z
dc.date.issued 2012-06-07
dc.date.submitted 2011-10-04
dc.identifier.uri http://hdl.handle.net/10210/5036
dc.description M.Sc. en_US
dc.description.abstract Owing mostly to the ephemeral nature, pan wetlands aren’t afforded the attention that other (arguably) more attractive or functional wetland types entertain. In the Kruger National Park, the study of its freshwater resources has focused mainly on the water quality of its rivers leaving pans almost entirely unaccounted for, until now. The aims of this study were to determine a baseline assessment of the structural, hydrological, physico-chemical and biological characteristics of eight selected seasonal pans in the Kruger National Park. The results of this study show that the pans are relatively small (<1.3 hectares), shallow (from 0.4 to 1.1metres), of various shapes and can hold a greater volume of water where greater depth and increasingly concave basin profiles are present. The physico-chemical characteristics typically showed high summer sub-surface water temperatures (up to 38°C), anaerobic conditions, pH values of 6.2 to 7, low alkalinity, varied conductivity, turbid conditions and generally could be described as oligotrophic in terms of nutrients. The dominant anion in most cases was sulphate. Iron was the dominant metal in the water chemistry of the pans. Several dissolved metals in the water chemistry of the pans were relatively high in concentration including aluminium, zinc, copper, cadmium, lead and selenium when evaluated against national water quality standards. Overall, limited spatial and temporal similarities were observed between the pans in terms of the physico-chemical characteristics of the water. The sediment of the pans can be considered as high in organic content, generally moist and comprising of predominantly either very fine sand sediments or coarse sand with appreciable amounts of medium coarse sediments. In general, manganese was the most abundant metal in the sediments, followed by relatively high concentrations of chromium, nickel, copper and zinc when compared with international sediment quality standards. Correlations between metal concentrations, sediment size and organic content were not strong.Lastly, the degree of grass cover for some pans show remarkably similar variation in the degree of change with distance from the brim of the pans outward. The trees immediately surrounding the pans however, are diverse and generally correspond with earlier studies of the vegetation of the Kruger National Park. en_US
dc.language.iso en en_US
dc.subject Kruger National Park (South Africa) en_US
dc.subject Pans (Geomorphology) - Environmental aspects en_US
dc.subject Wetland ecology en_US
dc.subject Water quality biological assessment en_US
dc.title A baseline assessment of selected seasonal pans in the Kruger National Park, South Africa en_US
dc.type Mini-Dissertation en_US

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