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Dissertations / Theses on the topic 'Namib Desert (Namibia)'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Cloete, Melissa. "Microbial diversity of the Namib Desert salt pans." University of the Western Cape, 2015. http://hdl.handle.net/11394/5230.

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>Magister Scientiae - MSc<br>Salt pans are a characteristic feature of many dry deserts. The microbial communities inhabiting salt pans are thought to be particularly complex and are generally dominated by halophilic microorganisms. Although saline pools are frequently found within the hyper-arid Namib Desert, the microbial communities of these saline sites have been scarcely investigated. The aim of the present study was to characterise the archaeal, bacterial and cyanobacterial diversity inhabiting these extreme saline pools using three culture independent molecular techniques (DGGE, T-RFLP

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2

Gottlieb, Tunehafo Ruusa. "The contribution of fog to the moisture and nutritional supply of Arthraerua leubnitziae in the central Namib Desert, Namibia." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/27949.

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Fog is 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 can be an important input of nutrients to many ecosystems, but without water, dust deposited on leaves or on soil is inaccessible for plant uptake. In other studies of coastal ecosystems (e.g. Strandveld), it has been found that this combined deposition of nutrients represents a major source of

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3

Matengu, Brian Munihango. "Groundwater assessment and sustainable management of the coastal alluvial aquifers in Namib Desert, Namibia: Omdel Aquifer as case study." University of Western Cape, 2020. http://hdl.handle.net/11394/7852.

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Philosophiae Doctor - PhD<br>The study addressed the groundwater assessment and sustainable management of the coastal alluvial aquifers in Namib Desert, the Omaruru River Delta Aquifer (Omdel Aquifer) was used as a case study. Sustainable utilization of groundwater in parts of hyper-arid Sub-Saharan Africa, like the Namib Desert, is always a challenge due to lack of resources and data. Understanding of hydrogeological characteristics of the Omaruru Delta Aquifer System is a pre-requisite for the management of groundwater supply in the Central Namib area (Namib Desert). For the Omdel Aquifer in

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4

Eckardt, Frank. "THe distribution and origin of gypsum in the Central Namib Desert, Namibia : a study of the sulphur cycle in a coastal hyper-arid desert." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285262.

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5

Marks, Theodore Pearson. "Bedtime for the Middle Stone Age: land use, strategic foraging, and lithic technology at the end of the Pleistocene in the Namib Desert, Namibia." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6198.

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Scholars of the Late Pleistocene in Southern Africa have recently sought to develop models explaining long-term variation between Middle Stone Age and Late Stone Age assemblages in terms of variability between “macrolithic” vs. “microlithic” toolmaking systems associated with shifts in hunter-gatherer ecology and land use patterns. While it has often proven extremely difficult to actually test many models, recently developed methods allow us to do so in novel ways. In this dissertation, I use new archaeological data from excavations of two sites in the Namib Desert, as well as new approaches t

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6

Joubert, Eugene Christiaan. "A computational fluid dynamics study of the near surface wind patterns over a desert dune and the effect on seed dispersion." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/4357.

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Thesis (MScEng)--Stellenbosch University, 2010.<br>ENGLISH ABSTRACT: This project originated when a team of scientists at the Gobabeb training and research and centre observed seed accumulation sites on the slope of sand dunes in the Namib Desert. Seeds that accumulate on the slip face of a sand dune provide food for small desert creatures that in turn attract larger animals, resulting in a small ecosystem on the side of the dune. Since wind is the primary transport of seeds throughout the Namib Desert it is of interest to investigate wind patterns over the dune. In this project it is the

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7

Marsh, Alan Clive. "Aspects of the ecology of Namib Desert ants." Doctoral thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/7616.

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Includes bibliographial references (leaves 222-234).<br>Thirty-six 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 by these subfamilies was in part attributed to the abilities of certain members of these ant groups to store food. The majority of ant species occurred on the gravel plains where species richness was strongly correlated with mean annual r

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8

Lim, Sophak. "50,000 years of vegetation and climate change in the Namib Desert." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT150/document.

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Cette thèse présente les données des pollens et micro-charbons fossiles couvrant la période des 50 000 dernières années à partir de sites sélectionnés transversalement nord-sud du désert de Namib. Dans le cadre de cette thèse, on utilise le rock hyrax middens, l’accumulation des boulettes et des urines fossilisés du Procavia capensis, représentant une excellente archive pour archives pour la préservation des pollens et micro-charbons à long-terme. Trois sites des hyrax middens ont été sélectionnés pour l'analyse: au sud du désert de Namib (Pella), la marge est des dunes de sable de Namib (Zizo

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9

Armstrong, Alacia. "Seasonal dynamics of edaphic bacterial communities in the hyper-arid Namib desert." Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/3855.

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>Magister Scientiae - MSc<br>The aim of this study is to investigate the edaphic bacterial community dynamics over short (57 days) and long-term (1 year) sampling intervals using an extensive sampling strategy in combination with community fingerprinting by T-RFLP analyses and micro environmental characterization. The short-term study 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 conc

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10

Pineo, Sarah. "The water line : research into the peculiar place of the Namib Desert coast." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13964.

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This dissertation 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. Stretching from the ocean to the edge of an existing naturalindustrial salt pan, this site becomes the location for my architectural intervention, the Water Line. This intervention is a testing space for a small scale solar desalination and fog catching system that services a hydrology resear

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11

Jacobson, Peter James. "An ephemeral perspective of fluvial ecosystems: Viewing ephemeral rivers in the context of current lotic ecology." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30582.

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Hydrologic and material dynamics 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 higher than the global average, rendering the rivers among the most variable fluvial systems yet described. Further, a pronounced downstream hydrologic decay characterized all of the rivers. The high spatio-temporal variability in flow was reflected in patterns of material tra

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12

Kirchhof, Sebastian, Robyn S. Hetem, Hilary M. Lease, et al. "Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard." WILEY, 2017. http://hdl.handle.net/10150/626549.

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Knowledge of the thermal ecology of a species can improve model predictions for temperature-induced population collapse, which in light of climate change is increasingly important for species with limited distributions. Here, we use a multi-faceted approach to quantify and integrate the thermal ecology, properties of the thermal habitat, and past and present distribution of the diurnal, xeric-adapted, and active-foraging Namibian lizard Pedioplanis husabensis (Sauria: Lacertidae) to model its local extinction risk under future climate change scenarios. We asked whether climatic conditions in v

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13

Greyling, Telané. "Factors affecting possible management strategies for the Namib feral horses / Telané Greyling." Thesis, North-West University, 2005. http://hdl.handle.net/10394/1244.

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Demographic, biological and behavioural knowledge, together with information on the ecological interactions and impact of a species is fundamental to effective management of most mammal species. In this study, these aspects were investigated for a population of feral horses in the Namib Naukluft Park of Namibia, which lies within a part of the Namib Desert. An attempt was made to evaluate the justification of the continued existence of this exotic species in a conservation area, as well as to provide baseline information and recommendations regarding management of these horses. The study inves

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14

Baxter, Janine Rose. "Assessing genetic diversity of springtails (Collembola) across the Namib Desert and the potential role of environmental parameters in driving this diversity." Diss., University of Pretoria, 2018. http://hdl.handle.net/2263/67137.

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Desert environments are characterised by harsh conditions and possess low biodiversity largely caused by abiotic factors such as; low precipitation, soil organic matter, high temperatures, high levels of evapo-transpiration, pH and salinity. These factors significantly reduce primary production, which influences the availability of food resources for deserts organisms. The diversity and the drivers of diversity for below ground invertebrates including Collembola (springtails) are relatively unknown in the Namib Desert. Previous morphological studies have found only five species on the ba

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15

Morgan, Eric James [Verfasser]. "Continuous Measurements of Greenhouse Gases and Atmospheric Oxygen in the Namib Desert / Eric James Morgan." Kiel : Universitätsbibliothek Kiel, 2015. http://d-nb.info/107549270X/34.

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16

Lalley, Jennifer S. "Lichen-dominated soil crusts in the hyper-arid Namib Desert : anthropogenic impacts and conservation implications." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417605.

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17

Schultz, Christoph. "Remote sensing the distribution and spatiotemporal changes of major lichen communities in the Central Namib Desert." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=978949358.

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18

Swanepoel, Jacoba Wilhelmina. "Physiological response of the succulent Augea capensis (Zygophyllaceae) of the southern Namib desert to SO2 and drought stress / J.W. Swanepoel." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1110.

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The main aim of this study was to investigate the effects of water availability and SO2 pollution, imposed separately or simultaneously, on the photosynthetic metabolism of Augea capensis Thunb., a succulent of the Namib Desert in the region of Skorpion Zinc mine, Namibia. The main driver for this investigation was the need to distinguish between the effects of water availability on plants native to a desert environment, where water availability dominates plant response, but where the possibility of anthropogenic SO2 pollution poses a new threat to the unique succulent vegetation. Fifteen meas

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19

Noli, Hans Dieter. "An archaeological investigation of the Koichab River region of the south-western Namib Desert centred on the activities of Holocene hunter-gatherers." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/21816.

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Bibliography: pages 107-116.<br>The 1986-1988 archaeological investigations of the previously largely unresearched 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 dated archaeological material from the entire Namib coast, and the halving of the duration of the previously established Holocene hiatus for the southern Namib. It is suggested that the resources of

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20

Shikesho, Saima Dhiginina. "Seed dispersal by black-backed Jackals (Canis mesomelas) and hairy-footed gerbils (Gerbillurus spp.) of !nara (Acanthosicyos horridus) in the central Namib Desert." Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/34013.

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This study investigated primary seed dispersal of !nara (Acanthosicyos horridus) by Blackbacked Jackals (Canis mesomelas) and secondary seed dispersal by scatter-hoarding hairyfooted gerbils (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 that jackals were the dominant species to visit !nara (93.3%) and the only !nara frugivores recorded by camera t

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21

Fenwick, Gordon A. "Origin and surface form of the Tsondab Sandstone Formation, central Namib desert." Thesis, 1990. http://hdl.handle.net/10539/23018.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science. October 1990<br>Problems arising from a disparity in viewpoints regarding the surface form of the Tsondab Sandstone Formation, central Namib desert, Namibia, are examined through literature review and field investigation. It is shown that large distal low-angle fans, proposed in what has been termed the Low-Angle Fan model, are absent or limited to proximal reaches of the study area. The depositional sequence identifie

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22

Curtis, Angela Lesley. "The effects of artificial lighting on activity of Namib Desert bats (Mammalia: Chiroptera)." Diss., 2019. http://hdl.handle.net/10500/26151.

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The large-scale use of artificial light throughout the night has occurred in the last 100 years and continues to increase globally. Artificial light impacts many animal and plant taxa. The effects of artificial light on bats is species specific. The Namib Desert in Namibia is still relatively dark but subject to the same drivers of increasing development and urbanization that have increased the spread of artificial light globally. This study investigated the effects of the introduction of ultraviolet, yellow and white artificial light on the activity of bats in a rural environment with minimal

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23

Fielden, Laura Jane. "Selected aspects of the adaptive biology and ecology of the Namib Desert golden mole (Eremitalpa granti Namibensis)." Thesis, 1989. http://hdl.handle.net/10413/11026.

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Eremitalpa granti namibensis is a small blind subterranean insectivore (Chrysochloridae) endemic to the Namib Desert sand dunes. This study of the biology and ecology of the Namib mole assesses its adaptive strategies for survival in a harsh environment. Major areas of study include feeding ecology, movement patterns, home range, activity, thermoregulation and water metabolism. Diet of free-living moles was assessed through stomach content analysis while qualitative and quantitative descriptions of surface foraging paths related searching behaviour to resource abundance and distribution. Moles

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24

Armstrong, Alacia. "Seasonal dynamics of edaphic bacterial communities in the hyper-arid namib desert." Thesis, 2012. http://hdl.handle.net/11394/3833.

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>Magister Scientiae - MSc<br>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, the temporal variation of edaphic bacterial community in response to seasonal microenvironmental variation in the Namib Desert gravel plains has never been investigated in situ.The edaphic bacterial community dynamics were evaluated over short (57 days) and long-term

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25

Shabaan, Dalia H. "‘Allelofertile’ soil islands self-conditioned by Welwitschia mirabilis in the Namib Desert." Thesis, 2019. http://hdl.handle.net/10754/656256.

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Under the extreme arid conditions of deserts, long periods of drought, nutrient-poor soils and high temperatures severely challenge the primary productivity of the ecosystem. Desert plants have evolved morphological and physiological adaptations against abiotic stresses. Along with these adaptation strategies they can recondition their surrounding soil, which will result in the enrichment of nutrients and moisture in the soil surrounding the plant. Although such self-fertilization may support the growth of other sympatric plant species under the plant, competitive exclusion mechanisms (i.e., a

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26

Li, Bonan. "The impact of rainfall and fog on soil moisture dynamics in the Namib Desert." Thesis, 2017. https://doi.org/10.7912/C2K07C.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Soil moisture is a key variable in dryland ecosystems. Knowing how and to what extent soil moisture is influenced by rainfall and non-rainfall waters (e.g., dew, fog, and water vapor) is essential to understand dryland dynamics. The hyper-arid environment of the Namib Desert with its frequent occurrence of fog events provides an ideal place to conduct research on the rainfall and non-rainfall effects on soil moisture dynamics. Rainfall and soil moisture records was collected from three locations (gravel plain at Gobabeb (GPG), sand d

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27

Adhikari, Bishwodeep. "The Contributions of Soil Moisture and Groundwater to Non-Rainfall Water Formation in the Namib Desert." Thesis, 2019. http://hdl.handle.net/1805/20533.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Non-rainfall waters such as fog and dew are considered as important source of water in drylands, and the knowledge of possible sources of its formation is very important to make future predictions. Prior studies have suggested the presence of radiation fog in drylands; however, its formation mechanism still remains unclear. There have been earlier studies on the effects of fog on soil moisture dynamics and groundwater recharge. On the contrary, no research has yet been conducted to understand the contribution of soil moisture and gro

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28

Schultz, Christoph [Verfasser]. "Remote sensing the distribution and spatiotemporal changes of major lichen communities in the Central Namib Desert / vorgelegt von Christoph Schultz." 2006. http://d-nb.info/978949358/34.

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29

Krug, Cornelia Bettina [Verfasser]. "Adaptations of the four-striped field mouse (Rhabdomys pumilio, Sparman 1784) to the Namib Desert / vorgelegt von Cornelia Bettina Krug." 2002. http://d-nb.info/967116279/34.

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30

Sole, Catherine L. "Phylogeography of Scarabaeus (Pachysoma) Macleay (Scarabaeidae: Scarabaeinae)." Thesis, 2005. http://hdl.handle.net/2263/25912.

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Scarabaeus (Pachysoma) consists of 13 flightless dung beetle species endemic to the arid west coast of southern Africa. Scarabaeus (Pachysoma) are unique in their feeding and foraging habits, in that they randomly search for dry dung/detritus which, when found, is dragged forwards, and buried in a pre-constructed holding chamber, as opposed to the convention of rolling it backwards. This action is repeated to provision the chamber after which the nest is expanded to below the moisture line to allow the stored food to re-hydrate. Poor vagility, taxonomic contention - seen in Scarabaeus taxonomy

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