An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa

 

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dc.contributor.advisor Bond, William J en_ZA
dc.contributor.advisor Stock, WD en_ZA
dc.contributor.author Swemmer, Anthony Michael en_ZA
dc.date.accessioned 2014-11-22T05:52:22Z
dc.date.available 2014-11-22T05:52:22Z
dc.date.issued 2002 en_ZA
dc.identifier.citation Swemmer, A. 2002. An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/9781
dc.description Bibliography: leaves 220-238. en_ZA
dc.description.abstract The grasslands and savannas of the Hluhluwe-Umfolozi Park (HUP), South Africa contain unusual 'grazing lawn' communities dominated by short, grazing tolerant grasses. These grazing lawns appear to be highly productive, and support high densities of grazers during the late summer and early winter, but have a very limited distribution within HUP. A review of the grazing literature indicates a similar pattern at the global scale, with grazing lawns absent or rare in almost every grass-grazer system described. Resource limitations responsible for the limited distribution of grazing lawns were investigated. A conceptual model of key processes considered necessary for the formation and persistence of lawns in HUP was developed. Key processes include both frequent and non-selective grazing during the growing season Based on observations that the distribution of grazing lawns within HUP is strongly related to rainfall, it was hypothesized that further key processes control are involved. In areas of lowest rainfall grazing lawns are replaced by a sparse cover of forbs and unpalatable grass species. It was hypothesized that a shortage of mineral nitrogen (N) and / or water are key processes excluding grazing lawn grasses in these environments. In areas of highest rainfall grazing lawns do not form, even where grass communities have been heavily grazed for a year or more. It was hypothesized that below-ground competition for N by the dominant grasses (bunch grasses) prevent the establishment of grazing lawn grasses in these environments. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Botany en_ZA
dc.title An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Swemmer, A. M. (2002). <i>An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/9781 en_ZA
dc.identifier.chicagocitation Swemmer, Anthony Michael. <i>"An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2002. http://hdl.handle.net/11427/9781 en_ZA
dc.identifier.vancouvercitation Swemmer AM. An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2002 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9781 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Swemmer, Anthony Michael AB - The grasslands and savannas of the Hluhluwe-Umfolozi Park (HUP), South Africa contain unusual 'grazing lawn' communities dominated by short, grazing tolerant grasses. These grazing lawns appear to be highly productive, and support high densities of grazers during the late summer and early winter, but have a very limited distribution within HUP. A review of the grazing literature indicates a similar pattern at the global scale, with grazing lawns absent or rare in almost every grass-grazer system described. Resource limitations responsible for the limited distribution of grazing lawns were investigated. A conceptual model of key processes considered necessary for the formation and persistence of lawns in HUP was developed. Key processes include both frequent and non-selective grazing during the growing season Based on observations that the distribution of grazing lawns within HUP is strongly related to rainfall, it was hypothesized that further key processes control are involved. In areas of lowest rainfall grazing lawns are replaced by a sparse cover of forbs and unpalatable grass species. It was hypothesized that a shortage of mineral nitrogen (N) and / or water are key processes excluding grazing lawn grasses in these environments. In areas of highest rainfall grazing lawns do not form, even where grass communities have been heavily grazed for a year or more. It was hypothesized that below-ground competition for N by the dominant grasses (bunch grasses) prevent the establishment of grazing lawn grasses in these environments. DA - 2002 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa TI - An investigation of the limited distribution of the grazing lawns in Hluhluwe-Umfolozi Park, South Africa UR - http://hdl.handle.net/11427/9781 ER - en_ZA


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