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Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities
Several south-western Cape Ecklonia maxima communities were examined to determine their basic demography and the effects of substrate selection. Overall percentage substrate composition, stipe lengths and substrate attachment for all kelps were recorded at four sites off the Cape Peninsula. Strength...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2017
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| _version_ | 1867613153377910784 |
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| access_status_str | Open Access |
| author | West, Adam |
| author2 | Anderson, Robert J |
| author_browse | Anderson, Robert J West, Adam |
| author_facet | Anderson, Robert J West, Adam |
| author_sort | West, Adam |
| collection | Thesis |
| description | Several south-western Cape Ecklonia maxima communities were examined to determine their basic demography and the effects of substrate selection. Overall percentage substrate composition, stipe lengths and substrate attachment for all kelps were recorded at four sites off the Cape Peninsula. Strength of attachment to different substrates was measured. Selection for substrate type was analysed using Jacobs' index. A substrate of Pyura stolonifera was the most common for juveniles, whereas substrates of rock and conspecific holdfasts were dominant in the larger individuals. No significant difference in strength of attachment was found for kelps less than 50 cm. An analysis of the frequency of single- and multi-stiped holdfasts indicates that survival on rock is greater than on that of holdfasts. Size-class distributions indicate that E. maxima is a shade-tolerant species showing advanced regeneration. Establishment on rock may occur through episodic recruitment escaping grazing pressure. In areas with low grazing intensity, recovery from catastrophic storms may be limited by competition with understorey algae. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/25867 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:35.974Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/25867 Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities West, Adam Anderson, Robert J Botany Marine Biology Several south-western Cape Ecklonia maxima communities were examined to determine their basic demography and the effects of substrate selection. Overall percentage substrate composition, stipe lengths and substrate attachment for all kelps were recorded at four sites off the Cape Peninsula. Strength of attachment to different substrates was measured. Selection for substrate type was analysed using Jacobs' index. A substrate of Pyura stolonifera was the most common for juveniles, whereas substrates of rock and conspecific holdfasts were dominant in the larger individuals. No significant difference in strength of attachment was found for kelps less than 50 cm. An analysis of the frequency of single- and multi-stiped holdfasts indicates that survival on rock is greater than on that of holdfasts. Size-class distributions indicate that E. maxima is a shade-tolerant species showing advanced regeneration. Establishment on rock may occur through episodic recruitment escaping grazing pressure. In areas with low grazing intensity, recovery from catastrophic storms may be limited by competition with understorey algae. 2017-10-27T14:13:01Z 2017-10-27T14:13:01Z 1996 2017-03-08T14:07:41Z Bachelor Thesis Honours BSc (Hons) http://hdl.handle.net/11427/25867 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Marine Biology West, Adam Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| thesis_degree_str | Bachelor's / Honours |
| title | Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| title_full | Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| title_fullStr | Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| title_full_unstemmed | Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| title_short | Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities |
| title_sort | substrate dependant survivorship of ecklonia maxima in southern african kelp communities |
| topic | Botany Marine Biology |
| url | http://hdl.handle.net/11427/25867 |
| work_keys_str_mv | AT westadam substratedependantsurvivorshipofeckloniamaximainsouthernafricankelpcommunities |