A the'.is submitted to the Faculty of Science, University
of the Witwatersrand, Johannesburg, in the fulfillment of
the requirements of the Degree of Magister Scientae.
June 1992 / Aspects of the brown alga Pict~'ppt;eris lQ..n..qifolia at. Palm
Beach, Natal, were investigated wi\'-;.hspecial reference to
the effect of wave expozu~e~
A description of the species is giv~n and the
nomencluture discussed. D~strib1i.ltion of n. ).or~gifolia was
det~rmimad from literature and herbarium speof.mens .
various r(\~:~thodosf measuring wave exposure were assessed
and review~~d. At'!;:.emptswere made to quantify sand
abrasion and deposition in tihe scudy si.tes.
Morphological and structural aspect;s of the cha LLus were
found to vary considerably with season and wave exposure"
Light and scanning electron microscopy studie.s indicated
the relatjvely complex cell organisation of this brown
alga.
The prolific regeneration from various thallus sections
of .Q. longifolia indicate that regenerat.ion is an
important survival strate 'JY following damage.
Sexual reproduction and tetrasporogenesis were
investigated. Sex.ual reproduction was not prolific in the
field, however, tetraspores were abundant and are
believed to be particul~rly importcmt in high wave
exposure areas.
11. _j.Q.ngi;f'clige,x_periences a range of environmental
conditions and responds to these with morphological,
structural and reproductive &daptations.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/20835 |
| Date | 05 August 2016 |
| Creators | Blackmore, Natalie Lynn |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf, application/pdf |
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