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Abstract
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Article Information:
Effect of Illegal Small-Scale Mining Operations on Vegetation Cover of Arid Northern Ghana
D. Tom-Dery, Z. J. Dagben and S.J. Cobbina
Corresponding Author: Damian Tom-Dery
Submitted: April 29, 2012
Accepted: May 13, 2012
Published: June 30, 2012 |
Abstract:
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Illegal small-scale gold mining brings several benefits to developing countries like Ghana,
manifested mainly as employment and revenue but simultaneously impacts negatively on the immediate
environment. The study tested the hypothesis that density and diversity of key native tree and shrub species
differ in the mined and unmined areas of Nangodi in the Talensi-Nabdam District of the Upper East Region,
Ghana. A total of 20 plots (10×10 m) were studied in the mined and unmined areas. A total of 8 tree species
and 9 shrub species were recorded. The extent of vegetation affected by the activities of illegal small scale
miners was assessed. The Simpsons reciprocal diversity index of tree species at mined area was 8.33 as
compared to 10.8 for the unmined area. For shrub species, the Simpsons reciprocal diversity index was 8.33
for the mined areas while that of the unmined was 10.2. Common trees and shrubs species were identified in
both areas as designated by the calculated Jaccards similarity index of 0.6 for trees and 0.7 for shrubs. However
low mean density of 2.4 individual trees per 100 m2 and 5.6 individuals per 100 m2 was recorded in the mined
and unmined areas respectively. Shrubs species also recorded very low density figures of 1.4 and 2.6 per 100
m2 in the mined and unmined areas, respectively. The null hypothesis that there is no significant difference of
illegal small-scale mining on tree and shrub species density is rejected at the 0.05 significant level, indicating
that mining significantly affected vegetation cover. It is suggested that efforts should be made to reclaim the
degraded lands through reforestation.
Key words: Galamsey, mined area, small-scale mining, unmined area , vegetation, ,
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Cite this Reference:
D. Tom-Dery, Z. J. Dagben and S.J. Cobbina, . Effect of Illegal Small-Scale Mining Operations on Vegetation Cover of Arid Northern Ghana. Research Journal of Environmental and Earth Sciences, (06): 674-679.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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