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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.
51

Plant- and arthropod diversity of vegetable gardens along a socio-economic gradient within the Tlokwe Municipal Area / Nicola Botha

Botha, Nicola January 2012 (has links)
Globally urbanization has increased to such an extent that more than half of the human population currently resides in cities. In the years to come, urban expansion will especially take place in developing countries through efforts to improve economic growth and poverty alleviation. This may have a negative effect on native biodiversity within and surrounding urban environments. However, residential areas with a high proportion of gardens form a significantly large part of urban environments and these domestic gardens contribute to the maintenance and preservation of biodiversity in cities. Although the preservation of biodiversity in these gardens is important in the overall conservation of urban green spaces, little is known about how these gardens can possibly contribute to conservation purposes in urban areas. Bearing in mind that anthropogenic activities are possible drivers of urban biodiversity, it is vital to quantify socio-economic aspects within urban ecological research. In developing countries, such as South Africa, the inclusion of socio-economic aspects are especially important because there is a wider gap between poor and wealthy households. There are also a larger number of people that are dependent on their gardens for subsistence purposes, such as vegetable gardening. In the Municipal Area of Tlokwe, South Africa, there exists a definite socio-economic gradient from the poorer western to the more affluent eastern part of the city. Five socio-economic status (SES) classes, primarily based on % unemployment, were used in this study. The ultimate aim of this study was therefore to determine the plant- and arthropod diversity within urban domestic gardens along a socio-economic gradient. Vegetable gardens within domestic gardens were selected to quantify plant- and arthropod biodiversity. Biodiversity of adjacent lawns were also sampled for comparative purposes. The study also attempted to determine to what extent socio-economic aspects of city residents may be possible drivers of biodiversity within the gardens. Various other factors that might have an effect on the plant and/or arthropod diversity were included such as soil characteristics, specific management factors of the gardens and other land-uses surrounding domestic gardens. Arthropod diversity was surveyd by means of pitfall traps and suction sampling in eight 0.25 m2 squares along an 8 m transect in each representative garden. Arthropods were identified up to morphospecies level. Vegetation was surveyed along the same transect and total species composition was determined. Plants were identified up to species level. The plant and arthropod surveys were conducted in both the vegetable gardens and lawns of all SES classes. For the soil samples a 1:2.5 water analysis was conducted. A social survey was conducted in all representative gardens by means of a questionnaire and a SPOT 5 satellite imagery was used to determine the land-use types in the areas surrounding the participating gardens. All the above mentioned factors were compared between the different SES classes. Diversity indices for the arthropods, multivariate statistical analyses and ANOVA analyses were applied to test for meaningful variables between socio-economic status classes as well as vegetable gardens and lawns. From the results it was evident that the more affluent SES classes had significantly higher arthropod diversity values, whilst the lower income classes had higher plant diversity. The factor analysis between the plants and arthropods with the surrounding land-uses revealed two significant factors. Firstly, arthropod diversity was influenced by domestic gardens in the surrounding landscape and there was a positive correlation between these two variables. This indicates that a high percentage of surrounding domestic gardens were possible drivers of arthropod diversity. No correlations were evident between plant and arthropod diversity. Secondly, the other significant factor showed that one SES class had a significantly higher percentage of woodlands and grasslands as opposed to two of the other classes that had a significantly higher percentage of built structures within the surrounding area. Differences were also apparent between the SES classes concerning management regimes, financial stability and level of education. The two more affluent SES classes had obtained a higher level of education and income and had management practices that were uncommon in the three poorer SES classes. This study proposes that domestic gardens are a means to conserve biodiversity in cities. Vegetable gardens in domestic gardens will also be able to harbour a larger diversity of plants and arthropods than the lawns. The socio-economic status of residents also had a significant effect on biodiversity and therefore it should be included in studies on urban domestic gardens. This study also provides additional knowledge to the fundamentals of the field of urban ecology and the importance of using domestic gardens as an urban green space for conservation purposes. / Thesis (Master of Environmental Sciences)--North-West University, Potchefstroom Campus, 2013
52

A health promotional physical activity programme for adolescents in a semi-urban community : PLAY-study / Anita Lennox

Lennox, Anita January 2007 (has links)
Physical activity (PA) and physical fitness (PF) are regarded as important elements of a healthy lifestyle (Sallis & Patrick, 1994:304; Saxena et al., 2002; Beets & Pitetti, 2004:1796). Literature revealed that adolescents are more inclined to be physically inactive and spent time on sedentary activities, such as watching television (Wang & Biddle, 2001:1; Marshall et al., 2002:413; Neumark-Sztainer et al., 2003:803; Hancox et al., 2004; Malina et al., 2004:479). Adolescents from low socio-economic communities also experience various other barriers, such as performing income-generating activities and family duties (Prista et al., 1997:455; Kriska, 2000:50), time constraints (Saxena et al., 2002), too much homework (Deflandre et al., 2004:31) and distances from sports facilities (Nahas et al., 2003), which prevent them from being physically active. Stunting, defined as height growth retardation, is also a condition that is associated with poor socio-economic status (SES) and various studies showed an occurrence of up to 19% in children (Kruger et al., 2004:566; Cameron et al., 2005:414). Although different intervention studies were conducted to improve stunting, none were based on physical activity intervention (Lunn, 2002:109; Walsh et al., 2002:6). The first aim of the study was to determine the physical fitness status and physical activity levels of 15-year-old adolescents from a previously disadvantaged community. Secondly, to determine what factors would be regarded as either barriers or motivators for 15-year-old adolescents from this previously disadvantaged community for improving their physical activity and participation in sport and for determining their perception of their own physical activity level. The next aim was to analyse the physical activity choices and aerobic endurance of these 15-year-old adolescents and the effect of a physical activity intervention programme (PAIP) on their physical activity choices and levels and aerobic endurance. The last aim of the study was to examine the effect of a PAIP on the physical fitness of stunted 15-year-old adolescents. Two high schools (an intervention school [school 1] and a control school [school 2]) in a previously disadvantaged community near Potchefstroom, South Africa, participated in this study. The learners in the control school had a slightly better socio-economic status, determined by income per capita. All Grade 8 learners in School 1 and 2 were requested to participate in the research. Two hundred and fifty-two (N=252) Grade 8 learners (116 boys and 136 girls) in School 1 and N=66 Grade 8 learners (21 boys and 45 girls) in School 2 parents/guardians granted informed consent to participate in the study. The PAIP was conducted for an hour twice a week for 19 weeks directly after school hours for learners from School 1. No physical education classes or organised sport were part of the school curriculum during the intervention. A pre-test/post-test study design was used. Standard anthropometrical procedures were used to determine body mass, stature and four skin folds. The Fitnessgram (Meredith & Welk, 1999:9) and additional fitness tests were used to determine the physical fitness levels of the participants. The Previous Day Physical Activity Recall (PDPAR) (Trost et al., 1999:342) was used to determine the physical activity levels and television watching hours during one day of the week and weekend respectively. Biological maturity status was determined by means of the 5-stage Tanner scale (Faulkner, 1996:237). The questionnaire of Rowland (1990) which deals with barriers to physical activity and participation in sport was also used. A few of the questions were adjusted and additional questions from Meredith and Welk (1999:50) were added. Demographic information on the SES (income per capita, housing, water and electricity) of the participants, as well as information on how far learners walked to school and how long it took, was also determined. The data was analysed by means of descriptive statistics, correlational analysis, frequency and rank ordering, t-testing followed by Tuckey post hoc analysis, One-and Two-way Analysis of Covariance (ANCOVA) and Tuckey-Kramer multiple comparisons. The Statistica for Windows and SAS computer programmes were used to analyse the data according to the above-mentioned aims of the study. A p-value smaller or equal to 0.05 was accepted as significant. The results of the study indicated higher mean physical fitness values in the intervention group compared to the control group. Both boys and girls in the intervention group and boys in the control group were moderately active, while only the girls in the control group showed low levels of physical activity. Longer commuting distances were found in the intervention group, while more hours of television watching were found in the control group. The aerobic fitness, flexibility and body composition of group 1 and 2 fell within the healthy fitness zone (HFZ), while their strength fell outside the healthy fitness zone, and showed negative relationships with aerobic fitness and flexibility. Television viewing time and commuting distances to school appeared to have a moderate influence on the moderate to low physical activity levels of the total group, and physical activity showed a relationship with higher fitness values. Regarding the second aim, too much homework, lack of money and family responsibilities were indicated as barriers to being physically active, while encouragement of parents and friends to participate with, were found to be motivational factors. After participation in the physical activity programme it was found that the learners' perceptions had changed and they had better knowledge of the intensity of physical activity. The results analysed for the third aim of the study indicated disappointing results regarding the effect of the intervention programme and no significant improvement was found, because of poor attendance to the programme. The learners had to be categorised in different attendance groups of the intervention programme. The group with the highest attendance (>70%) of the programme seemed to sustain their aerobic fitness the best. From the activities that were included in the physical activity programme, it was established that netball and soccer had a small effect on the physical activity choices of the group after participating in the programme. The results of the fourth aim revealed that stunted girls, who participated regularly in the programme, showed better improvement in aerobic fitness and hand grip strength after participating in the activity programme compared to non-stunted girls, while the lean body mass and flexibility on the right side of the body had improved in stunted boys. The stunted boys and girls also showed improvement in different physical fitness variables compared to non-stunted boys and girls. It can be concluded from the results of this study that participating in an after school physical activity programme is not the answer to improving the physical activity of children living in low SES environments. Such programmes are, however, needed but should be implemented during school hours. The physical activity programme, however, had a positive effect on both the physical fitness (excluding strength) and aerobic fitness as well as on their perception of physical activity and physical fitness of the adolescents, and showed some effect on the fitness of stunted adolescents. Intervention strategies should however be developed to overcome the barriers that prevented children from low SES communities from being physically active. It is also important to empower these adolescents with knowledge and skills to enable them to maintain and increase their physical activity levels. Key words: Physical fitness, physical activity, adolescence, socio-economic status, boys and girls, barriers, motivators, stunting / Thesis (Ph.D. (Human Movement Science))--North-West University, Potchefstroom Campus, 2008.
53

Smoking and vascular dysfunction in African and Caucasian people from South Africa / M.C. Zatu

Zatu, Mandlenkosi Caswell January 2009 (has links)
Thesis (M.Sc. (Physiology))--North-West University, Potchefstroom Campus, 2009.
54

Comparison of the urban domestic garden flora along a socio-economic gradient in the Tlokwe City Municipality / Catherina Susanna Lubbe

Lubbe, Catherina Susanna January 2011 (has links)
Urbanisation has increased tremendously over the last 60 years so that more than 50 per cent of the world population now live in cities. This is especially true for in developed countries, but it is expected that developing countries will take the lead in future urban population growth. This increasing trend of urbanisation has severe consequences for the environment, as it fragments and changes natural areas and alter environmental conditions. This has compelled scientists from many different disciplines to focus on the inclusion of humans into ecology as a driving force of change to create a better understanding of urban ecosystems. The diversity of fauna and flora in the urban environment provides a myriad of ecosystem goods (such as food and fuel) and services (e.g. cleaning the air and reducing noise levels). Apart from these tangible benefits, urban green space also provides recreational, educational and social benefits to urban inhabitants. A surprisingly substantial proportion (21‒36 %) of the total urban green space that produces these ecosystem goods and services is located in private yards. This portrays the importance of the flora of this land-use type, but very little is known about garden flora and its potential for conservation. The determinants of diversity and species richness in gardens were found to be different than for semi-natural ecosystems, because of the high anthropogenic influence. One of these is the socio-economic status of the inhabitants. People with higher socio-economic status were found to harbour more diverse species assemblages in their gardens than those of lower socio-economic status. This phenomenon was termed the “luxury concept”. In the Tlokwe City Municipality (TCM), the legacy effects of apartheid created a steep socio-economic gradient as a result of the inequitable distribution of economic, natural and social resources. The aims of this study were to gain information on the flora that is present in the domestic gardens of the TCM and to determine if socio-economic status (SES), a management index (MI) and demographic factors influences the distribution of plant species between these gardens. A total of 835 plant species were recorded from 100 domestic gardens and the majority were of alien origin. This large number of species included some Red Data species, invasive alien species and also many utilitarian species. This portrays gardens as important ex situ conservation habitats, but simultaneously it could also threaten the integrity of our natural ecosystems through the distribution of alien invasive species. The gamma, alpha and beta diversity were determined across five SES classes to describe the patterns of domestic garden plant species diversity in the TCM. In accordance with other studies, correlations showed that the SES of the inhabitants affected the plant species distribution in the study area. This was especially true for the distribution of alien species that are cultivated for their ornamental value. More species were found in areas of high SES than those of lower SES. The other aspect that influenced the distribution of plant species in these gardens were the MI, although this was to a lesser extent than the effect of SES. The confirmation of differences along the SES gradient could be utilised by urban planners and policy makers to correct this imbalance through the provision of urban green spaces where it is needed most. / Thesis (M. Environmental Sciences and Management)--North-West University, Potchefstroom Campus, 2011.
55

The effect of literacy levels on parental involvement in selected primary schools in the Qwa Qwa region / Dipontsheng Merriam Nyama

Nyama, Dipontsheng Merriam January 2011 (has links)
Parents are considered to be important and indispensable stakeholders in education. Research shows that parental involvement in the education of their children is a crucial matter as it contributes directly to the learners’ academic achievement. This study intended to investigate the possible effects of parents’ literacy levels on their involvement in the education and the academic achievement of their children. Approached from a constructivist point of view, the study specifically focused on schools situated in the rural areas of the Qwa Qwa region. The rationale for choosing the particular geographical focus was that it is frequently argued that learners educated in rural environments often find themselves in disadvantaged situations since their parents are financially poor, that they lack proper formal education and thus have low literacy levels, and that they are seldom involved in their children’s education and academic achievement. In order to direct the study towards the intended purpose, a literature study was undertaken to explore the phenomena of literacy and parental involvement. Literacy, its occurrence in the South African context and how parents’ literacy levels relate to learner performance were examined. In addition, parental involvement was investigated by considering the parents’ role as primary educators and by highlighting the importance of parental involvement in terms of its benefits towards children’s education and academic performance. By means of a qualitative case study, individual and focus group interviews were conducted with purposeful selected Head of Departments (HODs), parents and learners from four conveniently selected intermediate schools in the Thabo Mofutsanyana District of the Qwa Qwa region. In total four HODs, 14 parent couples and 14 Grade 6 learners participated in the research. The results of this research show that the parents’ literacy levels indeed affect their involvement in their children’s education and academic achievement. Parents with low literacy levels appear that they want to be involved but that they find it difficult. Most parents with low literacy levels are not able to assist their children with schoolwork but depend on others, such as older siblings to assist. Furthermore the research reveals that parents do not often visit schools voluntarily but that they rather do so by invitation. However, relations between schools and parents appear to be healthy and the attitudes of parents towards their children’s education are positive. Although parents with low literacy levels cannot always assist their children with their schoolwork, they motivate and value the education of their children since they realize that education remains the vehicle for social-economic development in any society. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2011
56

The effect of literacy levels on parental involvement in selected primary schools in the Qwa Qwa region / Dipontsheng Merriam Nyama

Nyama, Dipontsheng Merriam January 2011 (has links)
Parents are considered to be important and indispensable stakeholders in education. Research shows that parental involvement in the education of their children is a crucial matter as it contributes directly to the learners’ academic achievement. This study intended to investigate the possible effects of parents’ literacy levels on their involvement in the education and the academic achievement of their children. Approached from a constructivist point of view, the study specifically focused on schools situated in the rural areas of the Qwa Qwa region. The rationale for choosing the particular geographical focus was that it is frequently argued that learners educated in rural environments often find themselves in disadvantaged situations since their parents are financially poor, that they lack proper formal education and thus have low literacy levels, and that they are seldom involved in their children’s education and academic achievement. In order to direct the study towards the intended purpose, a literature study was undertaken to explore the phenomena of literacy and parental involvement. Literacy, its occurrence in the South African context and how parents’ literacy levels relate to learner performance were examined. In addition, parental involvement was investigated by considering the parents’ role as primary educators and by highlighting the importance of parental involvement in terms of its benefits towards children’s education and academic performance. By means of a qualitative case study, individual and focus group interviews were conducted with purposeful selected Head of Departments (HODs), parents and learners from four conveniently selected intermediate schools in the Thabo Mofutsanyana District of the Qwa Qwa region. In total four HODs, 14 parent couples and 14 Grade 6 learners participated in the research. The results of this research show that the parents’ literacy levels indeed affect their involvement in their children’s education and academic achievement. Parents with low literacy levels appear that they want to be involved but that they find it difficult. Most parents with low literacy levels are not able to assist their children with schoolwork but depend on others, such as older siblings to assist. Furthermore the research reveals that parents do not often visit schools voluntarily but that they rather do so by invitation. However, relations between schools and parents appear to be healthy and the attitudes of parents towards their children’s education are positive. Although parents with low literacy levels cannot always assist their children with their schoolwork, they motivate and value the education of their children since they realize that education remains the vehicle for social-economic development in any society. / Thesis (M.Ed.)--North-West University, Vaal Triangle Campus, 2011
57

A health promotional physical activity programme for adolescents in a semi-urban community : PLAY-study / Anita Lennox

Lennox, Anita January 2007 (has links)
Physical activity (PA) and physical fitness (PF) are regarded as important elements of a healthy lifestyle (Sallis & Patrick, 1994:304; Saxena et al., 2002; Beets & Pitetti, 2004:1796). Literature revealed that adolescents are more inclined to be physically inactive and spent time on sedentary activities, such as watching television (Wang & Biddle, 2001:1; Marshall et al., 2002:413; Neumark-Sztainer et al., 2003:803; Hancox et al., 2004; Malina et al., 2004:479). Adolescents from low socio-economic communities also experience various other barriers, such as performing income-generating activities and family duties (Prista et al., 1997:455; Kriska, 2000:50), time constraints (Saxena et al., 2002), too much homework (Deflandre et al., 2004:31) and distances from sports facilities (Nahas et al., 2003), which prevent them from being physically active. Stunting, defined as height growth retardation, is also a condition that is associated with poor socio-economic status (SES) and various studies showed an occurrence of up to 19% in children (Kruger et al., 2004:566; Cameron et al., 2005:414). Although different intervention studies were conducted to improve stunting, none were based on physical activity intervention (Lunn, 2002:109; Walsh et al., 2002:6). The first aim of the study was to determine the physical fitness status and physical activity levels of 15-year-old adolescents from a previously disadvantaged community. Secondly, to determine what factors would be regarded as either barriers or motivators for 15-year-old adolescents from this previously disadvantaged community for improving their physical activity and participation in sport and for determining their perception of their own physical activity level. The next aim was to analyse the physical activity choices and aerobic endurance of these 15-year-old adolescents and the effect of a physical activity intervention programme (PAIP) on their physical activity choices and levels and aerobic endurance. The last aim of the study was to examine the effect of a PAIP on the physical fitness of stunted 15-year-old adolescents. Two high schools (an intervention school [school 1] and a control school [school 2]) in a previously disadvantaged community near Potchefstroom, South Africa, participated in this study. The learners in the control school had a slightly better socio-economic status, determined by income per capita. All Grade 8 learners in School 1 and 2 were requested to participate in the research. Two hundred and fifty-two (N=252) Grade 8 learners (116 boys and 136 girls) in School 1 and N=66 Grade 8 learners (21 boys and 45 girls) in School 2 parents/guardians granted informed consent to participate in the study. The PAIP was conducted for an hour twice a week for 19 weeks directly after school hours for learners from School 1. No physical education classes or organised sport were part of the school curriculum during the intervention. A pre-test/post-test study design was used. Standard anthropometrical procedures were used to determine body mass, stature and four skin folds. The Fitnessgram (Meredith & Welk, 1999:9) and additional fitness tests were used to determine the physical fitness levels of the participants. The Previous Day Physical Activity Recall (PDPAR) (Trost et al., 1999:342) was used to determine the physical activity levels and television watching hours during one day of the week and weekend respectively. Biological maturity status was determined by means of the 5-stage Tanner scale (Faulkner, 1996:237). The questionnaire of Rowland (1990) which deals with barriers to physical activity and participation in sport was also used. A few of the questions were adjusted and additional questions from Meredith and Welk (1999:50) were added. Demographic information on the SES (income per capita, housing, water and electricity) of the participants, as well as information on how far learners walked to school and how long it took, was also determined. The data was analysed by means of descriptive statistics, correlational analysis, frequency and rank ordering, t-testing followed by Tuckey post hoc analysis, One-and Two-way Analysis of Covariance (ANCOVA) and Tuckey-Kramer multiple comparisons. The Statistica for Windows and SAS computer programmes were used to analyse the data according to the above-mentioned aims of the study. A p-value smaller or equal to 0.05 was accepted as significant. The results of the study indicated higher mean physical fitness values in the intervention group compared to the control group. Both boys and girls in the intervention group and boys in the control group were moderately active, while only the girls in the control group showed low levels of physical activity. Longer commuting distances were found in the intervention group, while more hours of television watching were found in the control group. The aerobic fitness, flexibility and body composition of group 1 and 2 fell within the healthy fitness zone (HFZ), while their strength fell outside the healthy fitness zone, and showed negative relationships with aerobic fitness and flexibility. Television viewing time and commuting distances to school appeared to have a moderate influence on the moderate to low physical activity levels of the total group, and physical activity showed a relationship with higher fitness values. Regarding the second aim, too much homework, lack of money and family responsibilities were indicated as barriers to being physically active, while encouragement of parents and friends to participate with, were found to be motivational factors. After participation in the physical activity programme it was found that the learners' perceptions had changed and they had better knowledge of the intensity of physical activity. The results analysed for the third aim of the study indicated disappointing results regarding the effect of the intervention programme and no significant improvement was found, because of poor attendance to the programme. The learners had to be categorised in different attendance groups of the intervention programme. The group with the highest attendance (>70%) of the programme seemed to sustain their aerobic fitness the best. From the activities that were included in the physical activity programme, it was established that netball and soccer had a small effect on the physical activity choices of the group after participating in the programme. The results of the fourth aim revealed that stunted girls, who participated regularly in the programme, showed better improvement in aerobic fitness and hand grip strength after participating in the activity programme compared to non-stunted girls, while the lean body mass and flexibility on the right side of the body had improved in stunted boys. The stunted boys and girls also showed improvement in different physical fitness variables compared to non-stunted boys and girls. It can be concluded from the results of this study that participating in an after school physical activity programme is not the answer to improving the physical activity of children living in low SES environments. Such programmes are, however, needed but should be implemented during school hours. The physical activity programme, however, had a positive effect on both the physical fitness (excluding strength) and aerobic fitness as well as on their perception of physical activity and physical fitness of the adolescents, and showed some effect on the fitness of stunted adolescents. Intervention strategies should however be developed to overcome the barriers that prevented children from low SES communities from being physically active. It is also important to empower these adolescents with knowledge and skills to enable them to maintain and increase their physical activity levels. Key words: Physical fitness, physical activity, adolescence, socio-economic status, boys and girls, barriers, motivators, stunting / Thesis (Ph.D. (Human Movement Science))--North-West University, Potchefstroom Campus, 2008.
58

Smoking and vascular dysfunction in African and Caucasian people from South Africa / M.C. Zatu

Zatu, Mandlenkosi Caswell January 2009 (has links)
Thesis (M.Sc. (Physiology))--North-West University, Potchefstroom Campus, 2009.
59

Comparison of the urban domestic garden flora along a socio-economic gradient in the Tlokwe City Municipality / Catherina Susanna Lubbe

Lubbe, Catherina Susanna January 2011 (has links)
Urbanisation has increased tremendously over the last 60 years so that more than 50 per cent of the world population now live in cities. This is especially true for in developed countries, but it is expected that developing countries will take the lead in future urban population growth. This increasing trend of urbanisation has severe consequences for the environment, as it fragments and changes natural areas and alter environmental conditions. This has compelled scientists from many different disciplines to focus on the inclusion of humans into ecology as a driving force of change to create a better understanding of urban ecosystems. The diversity of fauna and flora in the urban environment provides a myriad of ecosystem goods (such as food and fuel) and services (e.g. cleaning the air and reducing noise levels). Apart from these tangible benefits, urban green space also provides recreational, educational and social benefits to urban inhabitants. A surprisingly substantial proportion (21‒36 %) of the total urban green space that produces these ecosystem goods and services is located in private yards. This portrays the importance of the flora of this land-use type, but very little is known about garden flora and its potential for conservation. The determinants of diversity and species richness in gardens were found to be different than for semi-natural ecosystems, because of the high anthropogenic influence. One of these is the socio-economic status of the inhabitants. People with higher socio-economic status were found to harbour more diverse species assemblages in their gardens than those of lower socio-economic status. This phenomenon was termed the “luxury concept”. In the Tlokwe City Municipality (TCM), the legacy effects of apartheid created a steep socio-economic gradient as a result of the inequitable distribution of economic, natural and social resources. The aims of this study were to gain information on the flora that is present in the domestic gardens of the TCM and to determine if socio-economic status (SES), a management index (MI) and demographic factors influences the distribution of plant species between these gardens. A total of 835 plant species were recorded from 100 domestic gardens and the majority were of alien origin. This large number of species included some Red Data species, invasive alien species and also many utilitarian species. This portrays gardens as important ex situ conservation habitats, but simultaneously it could also threaten the integrity of our natural ecosystems through the distribution of alien invasive species. The gamma, alpha and beta diversity were determined across five SES classes to describe the patterns of domestic garden plant species diversity in the TCM. In accordance with other studies, correlations showed that the SES of the inhabitants affected the plant species distribution in the study area. This was especially true for the distribution of alien species that are cultivated for their ornamental value. More species were found in areas of high SES than those of lower SES. The other aspect that influenced the distribution of plant species in these gardens were the MI, although this was to a lesser extent than the effect of SES. The confirmation of differences along the SES gradient could be utilised by urban planners and policy makers to correct this imbalance through the provision of urban green spaces where it is needed most. / Thesis (M. Environmental Sciences and Management)--North-West University, Potchefstroom Campus, 2011.
60

Exploring The Relationship Between The Socio-economic Structure And Some Topographic Variables In Cankiri

Dilekli, Naci 01 September 2004 (has links) (PDF)
This study aims to develop a method to investigate the relationship between socio-economic status of village settlements and some topographic variables using geographical information systems (GIS) and spatial statistical methods. The study area is &Ccedil / ankiri province, a mountainous region that lays at the northeast of Ankara. 331 villages represented by areal units are used in this study. 195 variables are used to extract a single socio-economic status indicator. First, all the variables are divided under three groups, namely economic, social and service. Principal Components Analysis (PCA) is used to construct an index indicating socio-economic status. The parameters that represent natural environment are / mean elevation, mean slope, mean aspect and the ratio of high quality soil in the total area, for each settlement unit. The data is visualized by choropleth, cartogram and 3D techniques. Then it is explored by using correlograms, spatial moving averages and geographically weighted regression (GWR). Finally linear non-spatial regression and spatial regression methods are utilized in order to establish a relation between the socio-economic status and environmental parameters.

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