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Sudan University of Science and Technology (SUST) 2020

Impacts of Gold Mining on Rangeland Vegetation and Local Communities in Al-Sobag Area, Gedarif State, Sudan

Mohammed, Fatima Siddig Alhadi

Titre : Impacts of Gold Mining on Rangeland Vegetation and Local Communities in Al-Sobag Area, Gedarif State, Sudan

Auteur : Mohammed, Fatima Siddig Alhadi

Université de soutenance : Sudan University of Science and Technology (SUST)

Grade : Master of Science (M.Sc.) In Range Science 2020

Résumé partiel
This study was conducted in Al-Sobag area at Gedarif State-Sudan in October 2018. The study aimed to assess the impacts of gold mining on rangeland vegetation and socio-economic aspects of local communities. The study area was chosen as a range site representing these rangelands affected by gold mining. Two range sites were selected (Site A) that affected by gold mining activities and (Site B) did not affected in the same zone. Each site was divided into four plots were selected randomly. Four lines transects with a specific angles used compass at each range site, to estimate vegetation attributes and soil seed bank. The socio-economic data were collected through general survey, observations and questionnaire. Four villages namely (Al-Bougaa- Al-Rbdaa Abogola and Al-Tokoon) were selected randomly from the total villages surrounding the mined sites. A total of 60 Households randomly selected which constituted about 10% of the total number of households in these villages, which approximately about (600) families. Data were analyzed for vegetation attributes ; organized, tabulated and analyzed using standard range measurements equations. All data tested by statistical analysis by using (SAS) program using (ANOVA) and Duncan procedure, to compare differences in vegetation attribute and seed bank in the two areas. The socio-economic data were analyzed using the Statistical Package for Social Sciences (SPSS) software (Ver. 20.0) by computing descriptive statistics. The main findings of this study according to the vegetation attributes showed that there were significant differences between percentages of ground cover in terms of bare soil, rocks, litter and plant cover in the location close to the mining activities, there are increased in the proportion of bare soil (56.37%) compared to the plant cover (2.25%).While there are no significant differences between the components of ground cover in the range site which is far from the mining area. Beside that the affected range site by gold mining activities was recorded the same percentage of live and dead seeds (50%), while the unaffected range site was recorded (31.6%) and (68.4%) for live and dead seeds respectively.

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