Commercial wildflower production in the fynbos biome and its role in the management of land-use

 

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dc.contributor.advisor Moll, Eugene J en_ZA
dc.contributor.author Davis, George William en_ZA
dc.date.accessioned 2016-11-10T06:49:19Z
dc.date.available 2016-11-10T06:49:19Z
dc.date.issued 1990 en_ZA
dc.identifier.citation Davis, G. 1990. Commercial wildflower production in the fynbos biome and its role in the management of land-use. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/22477
dc.description Bibliography: pages 175-201. en_ZA
dc.description.abstract The wildflower industry of the Cape, South Africa, utilizes ecosystems and vegetation of the Fynbos Biome either directly by harvesting of natural plant populations, or indirectly by land transformation for agro-horticultural production. This thesis reports on a study of conservation and management issues arising from: (a) direct veld-harvesting; and (b) primary annexation of land for controlled production of material. A review of the industry's structure and the controlling legislation, indicated a need for integration of current management strategies. A potential means of anticipating population degradation and local extinction of plant species through over-utilization was investigated by construction of a computer model. Lack of data describing the flow of material and revenue was highlighted as an impediment to resource management by means if modelling. Experimental work investigated the effects of marginal cultivation on mountain fynbos ecosystems as utilized by the industry. Work was conducted at a site in the Highlands Forest Reserve in the south-western Cape. This experimental system was cleared by burning, and tilled as if for commercial production. Disturbance effects on system parameters were monitored. These included energy and water regimes, aspects of community structure, plant growth, and water relations of the natural vegetation. Results showed that tillage altered the system during the dry summer months by increasing reflectivity of the soil surface to solar radiation, reducing soil temperatures, and increasing soil water content. Response of the vegetation included reduction of species richness and diversity, a reduction in projected foliar cover, and an increase in the productivity of some, but not all, of the naturally occurring dominant species. Two commercially favoured species of Protea were also introduced to the site. Survival and productivity of these populations were monitored as responses to substrate disturbance. Results showed that the treatment was significantly associated with better survival for P. cynaroides, but better productivity for P. repens. A concluding review suggests that there are general paradigmatic blocks between the economic and ecological facets of natural resource utilization which prevent implementation of optimal environmental management strategies. The wildflower industry is nominated as a small bridge for that gap. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Biological Sciences en_ZA
dc.title Commercial wildflower production in the fynbos biome and its role in the management of land-use en_ZA
dc.type Doctoral 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 Doctoral
dc.type.qualificationname PhD en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Davis, G. W. (1990). <i>Commercial wildflower production in the fynbos biome and its role in the management of land-use</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/22477 en_ZA
dc.identifier.chicagocitation Davis, George William. <i>"Commercial wildflower production in the fynbos biome and its role in the management of land-use."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1990. http://hdl.handle.net/11427/22477 en_ZA
dc.identifier.vancouvercitation Davis GW. Commercial wildflower production in the fynbos biome and its role in the management of land-use. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1990 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22477 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Davis, George William AB - The wildflower industry of the Cape, South Africa, utilizes ecosystems and vegetation of the Fynbos Biome either directly by harvesting of natural plant populations, or indirectly by land transformation for agro-horticultural production. This thesis reports on a study of conservation and management issues arising from: (a) direct veld-harvesting; and (b) primary annexation of land for controlled production of material. A review of the industry's structure and the controlling legislation, indicated a need for integration of current management strategies. A potential means of anticipating population degradation and local extinction of plant species through over-utilization was investigated by construction of a computer model. Lack of data describing the flow of material and revenue was highlighted as an impediment to resource management by means if modelling. Experimental work investigated the effects of marginal cultivation on mountain fynbos ecosystems as utilized by the industry. Work was conducted at a site in the Highlands Forest Reserve in the south-western Cape. This experimental system was cleared by burning, and tilled as if for commercial production. Disturbance effects on system parameters were monitored. These included energy and water regimes, aspects of community structure, plant growth, and water relations of the natural vegetation. Results showed that tillage altered the system during the dry summer months by increasing reflectivity of the soil surface to solar radiation, reducing soil temperatures, and increasing soil water content. Response of the vegetation included reduction of species richness and diversity, a reduction in projected foliar cover, and an increase in the productivity of some, but not all, of the naturally occurring dominant species. Two commercially favoured species of Protea were also introduced to the site. Survival and productivity of these populations were monitored as responses to substrate disturbance. Results showed that the treatment was significantly associated with better survival for P. cynaroides, but better productivity for P. repens. A concluding review suggests that there are general paradigmatic blocks between the economic and ecological facets of natural resource utilization which prevent implementation of optimal environmental management strategies. The wildflower industry is nominated as a small bridge for that gap. DA - 1990 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1990 T1 - Commercial wildflower production in the fynbos biome and its role in the management of land-use TI - Commercial wildflower production in the fynbos biome and its role in the management of land-use UR - http://hdl.handle.net/11427/22477 ER - en_ZA


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