Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna

 

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dc.contributor.advisor Bond, William J en_ZA
dc.contributor.author Maze, Kristal Elaine en_ZA
dc.date.accessioned 2014-10-25T18:58:56Z
dc.date.available 2014-10-25T18:58:56Z
dc.date.issued 2001 en_ZA
dc.identifier.citation Maze, K. 2001. Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/8775
dc.description Includes bibliographical references. en_ZA
dc.description.abstract The tree-grass mix defines savannas, yet savannas can be defined as ecosystems that move between transition states of grass and bush, the dynamics of which are complex, being affected by a number of biotic and abiotic factors. Recently there has been renewed interest in fire and its role in shaping and maintaining savanna communities in Africa. Other than its ability to radically alter the savanna components, relatively little is known about the mechanistic effects of fire regimes on the structural and functional dynamics of the ecosystem. Furthermore, the biological basis of the observed response has been very poorly studied. An improved understanding of savanna tree biology and how they respond to disturbance is essential for more effective ecosystem management. This study investigates variation in response of savanna trees to fire, and the underlying causes, in the Hluhluwe-Umfolozi Park, KwaZulu Natal, South Africa. This variation is explored by means of clipping experiments and controlled bums, across species, tree height (seedlings to adults), a rainfall gradient, and intensity and season of injury. The four study species were Acacia karroo, A.nilotica, A.caffra and Dichrostachys cinerea. A total of 670 trees were subjected to different clipping treatments and their response monitored for two years. The response of 1512 trees was assessed following eight controlled burns of varying intensity and season. I investigated seasonal variation in root starch storage as a possible mechanisms underlying tree response. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Botany en_ZA
dc.title Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna 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 Maze, K. E. (2001). <i>Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/8775 en_ZA
dc.identifier.chicagocitation Maze, Kristal Elaine. <i>"Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2001. http://hdl.handle.net/11427/8775 en_ZA
dc.identifier.vancouvercitation Maze KE. Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2001 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/8775 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Maze, Kristal Elaine AB - The tree-grass mix defines savannas, yet savannas can be defined as ecosystems that move between transition states of grass and bush, the dynamics of which are complex, being affected by a number of biotic and abiotic factors. Recently there has been renewed interest in fire and its role in shaping and maintaining savanna communities in Africa. Other than its ability to radically alter the savanna components, relatively little is known about the mechanistic effects of fire regimes on the structural and functional dynamics of the ecosystem. Furthermore, the biological basis of the observed response has been very poorly studied. An improved understanding of savanna tree biology and how they respond to disturbance is essential for more effective ecosystem management. This study investigates variation in response of savanna trees to fire, and the underlying causes, in the Hluhluwe-Umfolozi Park, KwaZulu Natal, South Africa. This variation is explored by means of clipping experiments and controlled bums, across species, tree height (seedlings to adults), a rainfall gradient, and intensity and season of injury. The four study species were Acacia karroo, A.nilotica, A.caffra and Dichrostachys cinerea. A total of 670 trees were subjected to different clipping treatments and their response monitored for two years. The response of 1512 trees was assessed following eight controlled burns of varying intensity and season. I investigated seasonal variation in root starch storage as a possible mechanisms underlying tree response. DA - 2001 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2001 T1 - Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna TI - Fire survival and life histories of Acacia and Dichrostachys species in a South African savanna UR - http://hdl.handle.net/11427/8775 ER - en_ZA


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