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Browsing Doctoral Degrees (Botany and Zoology) by Title

Browsing Doctoral Degrees (Botany and Zoology) by Title

Now showing items 1-20 of 55

The ability of terrestrial Oligochaeta to survive in ultramafic soils and the assessment of toxicity at different levels of organisation

Maleri, Rudolf A. (Stellenbosch : University of Stellenbosch, 2006-12)

Metals are natural elements of the earth crust usually present at low concentrations in all soils. Although many metals such as cobalt, copper, iron and zinc are essential to living organisms, at elevated concentrations ...
Alien species and propagules in the Antarctic : movements through space and time

Lee, Jennifer Elizabeth (Stellenbosch : University of Stellenbosch, 2009-03)

ENGLISH ABSTRACT: Although the impacts of biological invasions are widely appreciated, a bias exists in research effort to post‐dispersal processes because of the difficulties of measuring propagule pressure and the detecting ...
An analysis of the Pseudocordylus melanotus complex (Sauria: Cordylidae)

Bates, Michael Francis (Stellenbosch : Stellenbosch University, 2007-04)

ENGLISH ABSTRACT: The taxonomic status of southern Africa’s rupicolous crag lizards (genus Pseudocordylus) was investigated. As considerable confusion exists in the literature regarding the type specimens and type ...
Assembly and disassembly of bird pollination communities at the Cape of Africa

Geerts, Sjirk (Stellenbosch : Stellenbosch University, 2011-03)

ENGLISH ABSTRACT: With the current global decline in pollinators, and the concurrent decline in plant species, pollination research is becoming increasingly important. However, studies outside Europe and North-America and ...
Biodiversity and ecology of ophiostomatoid fungi associated with trees in the Cape floristic region of South Africa

Musvuugwa, Tendai (Stellenbosch : Stellenbosch University, 2014-04)

ENGLISH ABSTRACT: Very little is known about the diversity of fungi associated with Afromontane forests of the Cape Floristic Region (CFR) of South Africa. The ophiostomatoid fungi include many species, some known as ...
The biogeography, systematics and conservation of Phreatoicidean isopods in South Africa

Gouws, Gavin (Stellenbosch : University of Stellenbosch, 2004-12)

ENGLISH ABSTRACT: Historically, isopods of the suborder Phreatoicidea were thought to be represented in southern Africa by four species belonging to the endemic genus Mesamphisopus. This taxonomy was based on poor ...
A biosytematic [i.e. biosystematic] study of the seven minor genera of the Hyacinthaceae

Van der Merwe, Alison M. (Alison Mary) (Stellenbosch : Stellenbosch University, 2002-03)

ENGLISH ABSTRACT: A biosytematic revision of the seven minor genera of the Hyacinthaceae, including twenty-two species, was undertaken. Muller-Doblies & Muller-Doblies (1997) considered these seven genera (Amphisiphon ...
Cellular biomarkers of exposure to the fungicide copper oxychloride, in the common garden snail Helix aspersa, in Western Cape vineyards

Snyman, Reinette Georgenie (Stellenbosch : University of Stellenbosch, 2001-03)

Copper oxychloride (Cu2CI(OH)3) is a broad-spectrum fungicide, intensively sprayed in many South African vineyards and orchards. It is necessary to find accurate and effective methods of monitoring the effects of this ...
Characterization of candidate genes related to estrogenic activity in Oreochromis mossambicus

Esterhuyse, Maria M (Stellenbosch : Stellenbosch University, 2008-03)

Endocrine disruption is an alteration of the chemical messaging processes in the body. The value of studies‐ and monitoring of endocrine disruption using techniques included in the field of toxicogenomics is undoubtedly ...
Chromosomal evolution and phylogeny of golden moles and tenrecs (Mammalia : Afrosoricida)

Gilbert, Clement (Stellenbosch : University of Stellenbosch, 2008-03)

Afrosoricida is a 65 million years old (my) eutherian order that together with the Tubulidentata (aardvark) and Macroscelidea (elephant shrews) form the Afroinsectiphillia, a subclade of Afrotheria. It includes two ...
Climate change and invasion impacts in the sub-Antarctic

Treasure, Anne M. (Anne Margaret) (Stellenbosch : Stellenbosch University, 2012-03)

ENGLISH ABSTRACT: Climate change and biological invasions are major threats to biodiversity. In particular, these threats are predicted to influence terrestrial systems in the sub-Antarctic, where significant ecosystem ...
Climatic perturbation and speciation of Southern and Eastern African Bulbul/Greenbul species (family Pycnonotidae)

Lokugalappatti, L.G. Sampath (Stellenbosch : Stellenbosch University, 2011-12)

ENGLISH ABSTRACT: African greenbuls are an ideal model system with which to explore different hypothesis that may underlie observed patterns of lineage diversification. Among those few hypotheses amenable to falsification ...
Communication in the yellow mongoose, Cynictis penicillata

Le Roux, Aliza (Stellenbosch : University of Stellenbosch, 2007-12)

Improved anti-predator protection has been postulated to be the primary advantage of sociality in the family Herpestidae. Therefore, the yellow mongoose, Cynictis penicillata, is considered an anomaly in the family because ...
Comparative ecology and behaviour of Chamaeleo pumilus pumilus (Gmelin) and C. namaquensis A. Smith (Sauria: Chamaeleonidae)

Burrage, Bryan Ronald (Stellenbosch : Stellenbosch University, 1972-01)

ENGLISH ABSTRACT: See item for full text
Contamination levels in and cellular responses of intertidal invertebrates as biomarkers of toxic stress caused by heavy metal contamination in False Bay

Mdzeke, Naomi Patience (Stellenbosch : Stellenbosch University, 2004-03)

ENGLISH ABSTRACT:Heavy metals are persistent environmental contaminants whose sources of inputs into the environment are both natural and anthropogenic. The levels of heavy metals (cadmium, copper, nickel, lead and zinc) ...
Cytosystematics, sex chromosome translocations and speciation in African mole-rats (Bathyergidae: Rodentia)

Deuve, Jane Lynda (Stellenbosch : University of Stellenbosch, 2008-03)

The Bathyergidae are subterranean rodents endemic to Africa south of the Sahara. They are characterised by divergent diploid numbers that range from 2n=40 in Fukomys mechowi to 2n=78 in F. damarensis. In spite of this ...
Ecology and systematics of South African Protea-associated Ophiostoma species

Roets, Francois (Stellenbosch : University of Stellenbosch, 2006-12)

The well-known, and often phytopathogenic, ophiostomatoid fungi are represented in South Africa by the two phylogenetically distantly related genera Ophiostoma (Ophiostomatales) and Gondwanamyces (Microascales). They are ...
The ecology of large herbivores native to the coastal lowlands of the fynbos biome in the Western Cape, South Africa

Radloff, Frans Gustav Theodor (Stellenbosch : Stellenbosch University, 2008-12)

The south-western Cape is a unique region of southern Africa with regards to generally low soil nutrient status, winter rainfall and unusually species-rich temperate vegetation. This region supported a diverse large ...
Ecology of the Black-faced sheathbill on Marion Island

McClelland, Gregory T. W. (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: As the pace of climate change has begun to accelerate so too has it become clear that the direct impacts thereof are likely to have profound consequences for many island systems. Moreover, it has also ...
Ecotoxicity and environmental fate of diesel and diesel blends produced by Sasol’s Fischer-Tropsch processes using natural gas and coal as feedstock as well as biodiesel and biodiesel blends

Albertus, Randal Marius Colin (Stellenbosch : Stellenbosch University, 2012-12)

ENGLISH ABSTRACT: World crude oil demand and production is set to increase in the long term and is projected to increase from 82 barrels per day in 2007 to an estimated 104 million barrels per day in 2030 according to the ...