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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Evaluation of restoration and management actions in the Molopo savanna of South Africa :|ban integrative perspective / Christiaan Johannes Harmse

Harmse, Christiaan Johannes January 2013 (has links)
The loss of ecosystem resilience and rangeland (often referred to as veld in South Africa) productivity is a major problem in the semi-arid Savanna environments of southern Africa. The over-utilization of rangelands in the Molopo region of the North- West Province in South Africa has resulted in profound habitat transformations. A common regional indicator of rangeland degradation is the imbalance in the grasswoody ratio, characterized by a loss of grass cover and density with increased shrub or tree density. This can result in major reductions of rangeland productivity for the grazing animal, forcing land users to apply active or passive restoration actions to improve rangeland condition, control the thickening of woody species (bush thickening), mitigate economic losses and restoring the aesthetical value of the Savanna environment for ecotourism and game hunting aspects. This study formed part of the multinational EU-funded PRACTICE project (“Prevention and restoration actions to combat desertification: an integrated assessment”). The first aim of the study was to evaluate locally applied restoration actions using a participatory approach, followed by interviews with certain stakeholders that formed part of a multi-stakeholder platform (MSP) related to the livestock and game farming community in the Molopo. Participants of the MSP ranked indicators according to their relative importance regarding the restoration actions on an individual basis. The individual ranking results were combined with quantitative bio-physical and qualitative socio-economic measurements for each indicator in a multi-criteria decision analysis (MCDA), whereby the alternative actions were ranked according to their relevancy and performance. The results were then shared with members of the MSP in order to stimulate discussion among the members and contribute to the social learning of the project outcome. The overall positive response and acceptance of results by members of the MSP changed the perceptions and objectives of the land users regarding rangeland management. This type of participatory assessment was therefore found to be very promising in helping to identify more sustainable actions to mitigate rangeland degradation in the Molopo Savanna region. There is, however, still an urgent need to create legal policy frameworks and institution-building, to support local-level implementation in all socio-ecological and economic settings, particularly in communal areas. The second aim was to evaluate the effect of two chemical bush control actions (chemical hand- (HC) and aeroplane control (AC)) as well as rotational grazing (RGM) on the Molopo Savanna vegetation. Results show that rangeland productivity, i.e. forage production and grazing capacity, was found to be negatively related to the woody phytomass in the savanna system studied. Bush thickening influenced grass species composition which was commonly associated with a decline in the abundance of sub-climax to climax grasses, respectively. All three actions (HC, AC & RGM) significantly reduced the woody phytomass and increased forage production and grazing capacity. Although AC resulted in the highest reduction of woody phytomass, the highest forage production and grazing capacity was found under RGM. The second highest grazing capacity was found in HC sites, which was due to a high abundance of perennial, palatable climax grass species. Results from this study also show that the patterns and compositions of grass species, grass functional groups (GFGs) and woody densities indicated by RGM and chemical HC, best resemble a productive and stable savanna system that provides important key resources to support both grazing and browsing herbivores. / MSc (Environmental Sciences), North-West University, Potchefstroom Campus, 2014
12

Inrigtingsversorging van alkoholiste met spesifieke verwysing na die Avalon behandelingsentrum

Kivedo, Basil David January 1991 (has links)
Magister Artium - MA / The purpose of this investigation is to determine how a group of selected institutionalized alcoholics react to a broad-spectrum model in regard to their perception of treatment, re-integration into community life and general rehabilitation. The method that was employed to achieve this goal is fivefold. Firstly alcoholics were placed within a theoretical perspective by focusing on the etiology, nature, extent and consequences thereof. Secondly the existing methods of treatment and the existing facilities available in South Africa were investigated. These two objectives were realized by means of a comprehensive literature study. Thirdly an empirical investigation was carried out of the policy and philosophical approach as well as the application of the multi-disciplinary methods of treatment at the Avalon Treatment Centre. Information in this regard was gained during visits to the Centre by means of personal interviews with the team applying the treatment as well as the respondents reacted to the treatment model by means of case studies. Data was obtained by conducting unstructured in-depth interviews with the respondents. By this means respondents were identified in terms of their personality configuration, marital, scholastic, professional, religious and socio-economic status. The respondents' drinking behaviour is focused on in order to determine patterns and tendencies in the development of the respondents' drinking problem. The researcher also followed up the respondents' behaviour over a period of two years to determine their re-integration within the community as well as their total rehabilitation. Valuable information about the respondents was gained during group therapy sessions and also meetings of Alcoholics Anonymous by means of participant observation. As member of Alcoholics Anonymous the researcher was part of the group and on an equal footing with the respondents. The advantage this held was that the researcher was accepted by the group and information was passed on without inhibitions. Fifthly the findings, conclusions and recommendations resulting from the whole investigation are set out. From the investigation it would appear that the problem of alcoholism, especially in South Africa is serious and escalating. In the light of this, there is a growing need for effective treatment. In spite of intensive treatment with complete abstinence general, degenerate as the aim of the treatment, the respondents, in because of denial, resistance to treatment, personality and social configuration and also poor re-integration, reacted poorly to treatment. The present specifically be sharpened establishment study shows that institutional treatment and as applied by the Avalon Treatment Centre can in order to be more effective. The of a more realistic perception of alcoholism among alcoholics per se is foremost. A more "enlightened" view of alcoholism is pleaded in terms of which alcoholism would be viewed as a non-stigmatised illness responding to treatment. The possibility that there will be a greater willingness on the part of alcoholics to submit to treatment is visualised. A more positive image of treatment centres should be created while the problem of alcoholism must be approached with a greater measure of sensitivity. Treatment should be of such a nature that it should emphasize and reinforce a positive self-image, pride in oneself and dignity. A more extensive programme of treatment that would include an exploratory project and longitudinal research is pleaded. The desirability of involving other key figures, important persons in the alcoholics life, and institutions as well as community organizations proposed with The traditional emphasis should helping fall services is re-orientation and education in order on sensitising, to achieve a more positive perception and understanding of alcoholism within the community. This study will hopefully stimulate further research in this direction. / South Africa

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