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The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Biological Sciences
2015
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| _version_ | 1867613239417765888 |
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| access_status_str | Open Access |
| author | Gersun, Leanne |
| author2 | Anderson, R J |
| author_browse | Anderson, R J Gersun, Leanne |
| author_facet | Anderson, R J Gersun, Leanne |
| author_sort | Gersun, Leanne |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13051 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:58.612Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| 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:11427/13051 The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa Gersun, Leanne Anderson, R J Bolton, John J Marine Biology Includes bibliographical references. The high latitude coral communities of southern Africa suffered minimal impacts during mass bleaching events in the recent past. However, during the 2005 warm-water anomaly in the southern Indian Ocean, coral bleaching reached unprecedented levels. There is surprisingly little known about the fate of bleached corals, which may either regain their zooxanthellae and recover, or may die, in which case they generally become overgrown by macroalgae. The nature and dynamics of this algal overgrowth are not well understood. This study was done on Two-Mile Reef, Sodwana Bay, located in the iSimangaliso Wetland Park, a World Heritage Site. The first aim was to investigate the abundance and diversity of benthic algal communities colonising different hard substrata (comprising bleached digitate, brain and plate coral assemblages, and beach rock). The second was to compare the algal communities colonising various artificial hard substrata. The third was to document the species of non-geniculate coralline red algae found on the natural hard substrata during sampling. Fieldwork was carried out during the marine autumn (March) and spring (September) of 2010 using SCUBA. A total of 90 quadrats (10 cm x 10 cm) were sampled and the underlying substratum was recorded and classified. A Braun-Blanquet scale was used to assign cover-abundance values to each species within each quadrat. Additionally, the relative cover of different types of substrata was estimated using line-point intercept methods. Multivariate analysis (detrended correspondence analysis) and cluster analysis (complete linkage Bray-Curtis) were used to show how substrata and season relate with respect to their seaweed flora. Additionally, Kruskal-Wallis nonparametric tests with pairwise Mann-WhitneyU-tests were used to examine differences in macroalgal assemblages among substratum types. 2015-06-01T14:14:12Z 2015-06-01T14:14:12Z 2014 Master Thesis Masters MSc http://hdl.handle.net/11427/13051 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Marine Biology Gersun, Leanne The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| thesis_degree_str | Master's |
| title | The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| title_full | The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| title_fullStr | The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| title_full_unstemmed | The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| title_short | The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa |
| title_sort | abundance and diversity patterns of seaweed communities on natural and artificial substrata at sodwana bay south africa |
| topic | Marine Biology |
| url | http://hdl.handle.net/11427/13051 |
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