Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Namib Desert"”.
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Aspects of the ecology of Namib Desert ants
… species of ants were collected in the central Namib Desert, Namibia during the period 1981 to 1985. The ant fauna was dominated by the Myrmicinae, comprising 29 species, followed by the Formicinae, comprising six species and the Pseudomyrmecinae with one species. The dominance of the ant fauna …
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Seasonal dynamics of edaphic bacterial communities in the hyper-arid Namib desert
… was conducted on three distinct locations in the Namib Desert gravel plains. Soil bacterial communities were found to be more similar within habitats than between habitats, with the differences likely shaped by soil pH. These findings are consistent with the concept of habitat filtering. …
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Seasonal dynamics of edaphic bacterial communities in the hyper-arid namib desert
The Namib Desert is a hyper-arid, coastal desert with limited bioavailable water and nutrients; characteristics which collectively impose constraints on edaphic microbial communities. Several studies in the Namib Desert have investigated changes in soil microbial communities across space. However, …
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Social and spatial mobility along the Kuiseb River in the Namib Desert, Namibia
This study seeks to explain the unusually high rate of circulation of individuals between local domestic units of the rural settlements along the Kuiseb River as well as between these and domestic units in the closest urban centre. It is argued that these movements form part of a general state of …
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Sedimentation on the continental margin off the Orange River and the Namib Desert
… continental margin off the Orange River and the Namib Desert. The study area is bounded by latitudes 25° and 3o0 s. The Orange shelf is up to 100 km wide and 200 m deep, and the Walvis shelf off Lllderitz is up to 80 km wide and 400 m deep, the inner shelf is underlain by. Precambrian bedrock and …
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Behavioural and physiological ecology of the Namib Desert dune ant, Camponotus detritus emery
… examined over two years at six sites across the Namib Desert. This common species was found to fill an important role in the dune ecosystem as the major honeydew consumer, apparently limited chiefly by intraspecific competition for food. Each colony, comprising one to four nests with a mean of 3 …
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The water line : research into the peculiar place of the Namib Desert coast
… began as a study of a portion of the coastal Namib Desert that I am particularly inspired by and with which I formed a personal connection over the course of many childhood coastal excursions. From these studies a site within the salt pan mine concession outside of Swakopmund was chosen. …
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The contribution of fog to the moisture and nutritional supply of Arthraerua leubnitziae in the central Namib Desert, Namibia
… a key source of moisture to the diverse coastal Namib Desert biota, delivering five times more moisture than rain. Apart from the importance of fog as a source of water for plants, it is also associated with particulates that may contain essential nutrients for plants. Furthermore, dry deposition …
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High-grade metamorphism and migmatizaof the Namaqua metamorphic complex around Aus in the Southern Namib Desert, South West Africa
Rocks of the Namaqua Metamorphic Complex are exposed in an area of 10 000 km² in the northwestern part of the Namaqua Mobile Belt east of Liideritz. The Garub sequence represents the oldest rocks in the Aus area and comprises a diverse group of layered rocks of mainly semi-pelitic, pelitic, mafic, …
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Ecological niche partitioning and resource utilization in two sympatric lacertid lizard species (Meroles anchietae and M. cuneirostris) from the Namib Desert
… Coupled with a scarcity of resources, the Namib Desert is an arid ecosystem with a high lizard diversity and presents an ideal ecosystem to investigate niche partitioning in lizards. In the Namib, fog is the main source of moisture and due to climate change, the Benguela Current which is …
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An archaeological investigation of the Koichab River region of the south-western Namib Desert centred on the activities of Holocene hunter-gatherers
… Koichab River region the south-western Namib Desert are described. The sites studied are those of Holocene hunter-gatherers. Included are the analyses of archaeological remains from two excavations and three surface collections. The investigations resulted in the recovery of the oldest …
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Seed dispersal by black-backed Jackals (Canis mesomelas) and hairy-footed gerbils (Gerbillurus spp.) of !nara (Acanthosicyos horridus) in the central Namib Desert
… (Gerbilliscus (Gerbillurus) spp.) in the central Namib Desert. This was accomplished by examining visitation rates and fruit removal of !nara melons, primarily by jackals. In addition, I determined the viability and germination rate of !nara seeds collected from jackal scat. The results indicate …
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Benthic foraminifera from the Orange-Luderitz shelf, southern African continental margin
… upper slope off the Orange River mouth and the Namib Desert was undertaken as an adjunct to sedimentological and geophysical investigations being conducted by members of the Joint Geological Survey/University of Cape Town Marine Geoscience Group. 117 species in 65 genera of benthic foraminifera …
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The Vegetation and Restoration Potential of the Arid Coastal Belt Between Port Nolloth and Alexander Bay, Namaqualand, South Africa.
… located within the winter rainfall area of the Namib Desert, is one of four global fog deserts. The area is characterised by a near ubiquitous covering of Recent to Tertiary amorphous dunes of marine origin. The dunes can be divided into two broad categories: Recent, mobile white dunes, and …
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Design and microfabrication of multifunctional bio-inspired surfaces
… well-known lotus leaf, sharkskin, back of the Namib Desert beetle, butterfly wings, and legs of water-walking insects. The lotus leaf features superhydrophobicity, which leads to low adhesion and self-cleaning. Sharkskin is composed of ripples that manage to reduce skin-friction and thus drag …
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The thermal implications and ecological consequences of coloration in selected species : tenebrionid beetles (Onymacris bicolor and Onymacris ungui cularis), Cape gannets (Morus capensis) and Cape cormorants (Phalacrocorax capensis)
… of coloration was investigated in two species of Namib Desert tenebrionid beetles and two species of marine birds. Body temperatures and heat fluxes of a black beetle (Onymacris unguicularis) and a beetle with white elytra (Onymacris bicolor) were compared in a wind tunnel in the laboratory. The …
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A forensic anthropological investigation of skeletal remains recovered from a 1000 year old archaeological site in North Western Namibia
… sinkhole at Khoraxa-ams northwest of the Central Namib Desert. Subsequent dating of the site indicated that the remains had been deposited in the cavern in the order of a thousand years ago. The aim of this study was to examine skeletal remains recovered from the site and draw possible conclusions …
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Morphogenetic landscapes :
… scales. One example of such a habitat is the Namib Desert in southwest Africa. It is not only one of the hottest and driest places or Earth, it is also the geologically oldest desert in the world at 55 million years. These parameters converge to create one of the most evolutionary excited …
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The vegetation and restoration potential of the arid coastal belt between Port Nolloth and Alexander Bay, Namaqualand, South Africa
… located within the winter rainfall area of the Namib Desert, is one of four global fog deserts. The area is characterised by a near ubiquitous covering of Recent to Tertiary amorphous dunes of marine origin. The dunes can be divided into two broad categories: Recent, mobile white dunes, and …
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An ephemeral perspective of fluvial ecosystems: Viewing ephemeral rivers in the context of current lotic ecology
… of ephemeral rivers were investigated in the Namib Desert to assess how hydrologic regimes shape the physical habitat template of these river ecosystems. An analysis of long-term hydrologic records revealed that the variation in mean annual runoff and peak discharge were nearly four times …
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