Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options

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dc.contributor.advisorBolton, John Jen_ZA
dc.contributor.advisorDay, John Aen_ZA
dc.contributor.authorArchibald, Sallyen_ZA
dc.date.accessioned2017-05-24T07:08:50Z
dc.date.available2017-05-24T07:08:50Z
dc.date.issued1998en_ZA
dc.description.abstractThe aquatic weeds on the Westlake wetland at Zandvlei (Cape Town, South Africa) were investigated in terms of their detrimental effects, and the biotic and abiotic conditions associated with their nuisance growth. Eichhornia crassipes was the most problematic of the weeds, both from a human perspective and in its effect on the system, and it appears to out-compete the initially more abundant Ceratophyllum demersum and Azolla filiculoides after disturbances such as clearing and flooding. Temperature, current strength and inter-species interactions were controlling the distribution and growth of the weeds on a seasonal scale, but over the long term it is likely that lower salinities, together with high concentrations of nitrogen and phosphorus, have caused the increased growth noticeable over the last fifteen years. The present management programme of annual mechanical clearance seems to be the most cost-efficient, ecosystem-friendly option but it is suggested that the possibility of increasing the salinity in the wetland be investigated as a way of slowing the regrowth of the weeds after clearance.en_ZA
dc.identifier.apacitationArchibald, S. (1998). <i>Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/24395en_ZA
dc.identifier.chicagocitationArchibald, Sally. <i>"Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1998. http://hdl.handle.net/11427/24395en_ZA
dc.identifier.citationArchibald, S. 1998. Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Archibald, Sally AB - The aquatic weeds on the Westlake wetland at Zandvlei (Cape Town, South Africa) were investigated in terms of their detrimental effects, and the biotic and abiotic conditions associated with their nuisance growth. Eichhornia crassipes was the most problematic of the weeds, both from a human perspective and in its effect on the system, and it appears to out-compete the initially more abundant Ceratophyllum demersum and Azolla filiculoides after disturbances such as clearing and flooding. Temperature, current strength and inter-species interactions were controlling the distribution and growth of the weeds on a seasonal scale, but over the long term it is likely that lower salinities, together with high concentrations of nitrogen and phosphorus, have caused the increased growth noticeable over the last fifteen years. The present management programme of annual mechanical clearance seems to be the most cost-efficient, ecosystem-friendly option but it is suggested that the possibility of increasing the salinity in the wetland be investigated as a way of slowing the regrowth of the weeds after clearance. DA - 1998 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1998 T1 - Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options TI - Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options UR - http://hdl.handle.net/11427/24395 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/24395
dc.identifier.vancouvercitationArchibald S. Investigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management options. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1998 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/24395en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.titleInvestigating the Aquatic weeds on the Westlake Wetland: Detrimental effects and management optionsen_ZA
dc.typeBachelor Thesis
dc.type.qualificationlevelHonours
dc.type.qualificationnameBSc (Hons)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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