Changing land use / land cover around an urban estuary : implications for ecosystem functioning
| dc.contributor.advisor | Hoffmann, Timm | en_ZA |
| dc.contributor.author | Jack, Sam | en_ZA |
| dc.date.accessioned | 2017-08-23T13:09:36Z | |
| dc.date.available | 2017-08-23T13:09:36Z | |
| dc.date.issued | 2006 | en_ZA |
| dc.date.updated | 2017-02-08T13:23:12Z | |
| dc.description.abstract | The changing spatial and temporal patterns in land use/land cover surrounding Zandvlei estuary were investigated over the period 1944 to 2005. Changes in the extent of four terrestrial and two aquatic land use/land cover categories were mapped from high quality aerial photographs using ArcView GIS. Basic spatial analyses were performed to quantify changes in area, 'edge-effects' and relative dominance through time. Semi-natural and seasonally inundated classes accounted for over 70% of land cover in 1944, but declined steadily as urban land use and permanently inundated land cover expanded to a present-day extent of 42% and 19% respectively. The following major drivers of change were identified: 1) the construction of the railway embankment bisecting Westlake wetland and Zandvlei estuary, which led to sedimentation and a change in plant species composition of the wetland, but decreased nutrient inflows into the vlei; 2) agricultural practices within the catchment at the start of the 20th century which increased sediment and nutrient inflows; 3) elevated water levels due to dredging operations between 1947 and 1961, which resulted in a significant loss of seasonally inundated land cover with concomitant changes in species composition and nutrient dynamics; and 4) urban development surrounding the vlei (with particular reference to Marina da Gama), which has expanded at the expense of semi-natural areas and significantly increased effluent and litter inputs into the vlei. A socially and ecologically balanced management policy governing the entire catchment is required to mitigate future impacts. | en_ZA |
| dc.identifier.apacitation | Jack, S. (2006). <i>Changing land use / land cover around an urban estuary : implications for ecosystem functioning</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/24958 | en_ZA |
| dc.identifier.chicagocitation | Jack, Sam. <i>"Changing land use / land cover around an urban estuary : implications for ecosystem functioning."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2006. http://hdl.handle.net/11427/24958 | en_ZA |
| dc.identifier.citation | Jack, S. 2006. Changing land use / land cover around an urban estuary : implications for ecosystem functioning. University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Thesis / Dissertation AU - Jack, Sam AB - The changing spatial and temporal patterns in land use/land cover surrounding Zandvlei estuary were investigated over the period 1944 to 2005. Changes in the extent of four terrestrial and two aquatic land use/land cover categories were mapped from high quality aerial photographs using ArcView GIS. Basic spatial analyses were performed to quantify changes in area, 'edge-effects' and relative dominance through time. Semi-natural and seasonally inundated classes accounted for over 70% of land cover in 1944, but declined steadily as urban land use and permanently inundated land cover expanded to a present-day extent of 42% and 19% respectively. The following major drivers of change were identified: 1) the construction of the railway embankment bisecting Westlake wetland and Zandvlei estuary, which led to sedimentation and a change in plant species composition of the wetland, but decreased nutrient inflows into the vlei; 2) agricultural practices within the catchment at the start of the 20th century which increased sediment and nutrient inflows; 3) elevated water levels due to dredging operations between 1947 and 1961, which resulted in a significant loss of seasonally inundated land cover with concomitant changes in species composition and nutrient dynamics; and 4) urban development surrounding the vlei (with particular reference to Marina da Gama), which has expanded at the expense of semi-natural areas and significantly increased effluent and litter inputs into the vlei. A socially and ecologically balanced management policy governing the entire catchment is required to mitigate future impacts. DA - 2006 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - Changing land use / land cover around an urban estuary : implications for ecosystem functioning TI - Changing land use / land cover around an urban estuary : implications for ecosystem functioning UR - http://hdl.handle.net/11427/24958 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/24958 | |
| dc.identifier.vancouvercitation | Jack S. Changing land use / land cover around an urban estuary : implications for ecosystem functioning. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2006 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/24958 | en_ZA |
| dc.language.iso | eng | en_ZA |
| dc.publisher.department | Department of Biological Sciences | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.subject.other | Botany | en_ZA |
| dc.subject.other | Ecological Conservation | en_ZA |
| dc.title | Changing land use / land cover around an urban estuary : implications for ecosystem functioning | en_ZA |
| dc.type | Bachelor Thesis | |
| dc.type.qualificationlevel | Honours | |
| dc.type.qualificationname | BSc (Hons) | en_ZA |
| uct.type.filetype | ||
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Thesis | en_ZA |