Hydrogeochemistry of the upper part of the Fort Union group in the Gascoyne lignite strip-mining area, North Dakota

1987 ◽  
Author(s):  
R. L. Houghton ◽  
Donald C. Thorstenson ◽  
Donald W. Fisher ◽  
G.H. Groenewold
Keyword(s):  
North Dakota ◽  
Mining Area ◽  
Strip Mining ◽  
Area North

Evaporation from a small prairie wetland in the Cottonwood Lake area, North Dakota—An energy-budget study

Wetlands ◽  
1998 ◽  
Vol 18 (2) ◽  
pp. 272-287 ◽  
Author(s):  
Renee S. Parkhurst ◽  
Thomas C. Winter ◽  
Donald O. Rosenberry ◽  
Alex M. Sturrock
Keyword(s):  
North Dakota ◽  
Energy Budget ◽  
Lake Area ◽  
Prairie Wetland ◽  
Area North

Phytosociological description of norite koppies in the Rustenburg area, North-West Province and refinement of the distribution of the Norite Koppies Bushveld on the national vegetation classification map of South Africa

Bothalia ◽  
2011 ◽  
Vol 41 (2) ◽  
pp. 327-339
Author(s):  
A. J. H. Lamprecht ◽  
S. S. Cilliers ◽  
A. R. Götze ◽  
M. J. Du Toit
Keyword(s):  
Species Composition ◽  
Vegetation Type ◽  
Mining Area ◽  
Multivariate Statistical ◽  
North West ◽  
The North ◽  
North West Province ◽  
Platinum Mining ◽  
Area North ◽  
Surrounding Areas

The Norite Koppies Bushveld vegetation type boasts a distinctive and contrasting topography and species composition easily distinguished from that of surrounding areas. A phytosociological study was done on the leased mining area of the Impala Platinum Mining Company north of Rustenburg in the North-West Province. Similar norite koppies, situated west of the Norite Koppies Bushveld vegetation, and not yet mapped by Mucina Rutherford (2006), were identified in the study area and phytosociologically described. Six plant communities and two subcommunities were identified. Multivariate statistical analyses (correspondence analyses) confirmed that the species composition of these areas corresponds with and does therefore form part of the Norite Koppies Bushveld vegetation type as described by Mucina Rutherford (2006). Some of these communities contain Boscia albitrunca, a protected plant species, and should therefore be considered as areas with conservation value.

scholarly journals Tarnita Polluted Area: Accumulation of Heavy Metals and Nutrients from the Soil by Woody Species

2019 ◽  
Vol 70 (3) ◽  
pp. 753-758 ◽  
Author(s):  
Carmen Iacoban ◽  
Ioan Marian Risca ◽  
Catalin Roibu ◽  
Elena Todirascu Ciornea ◽  
Radu Necula ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Abies Alba ◽  
Woody Species ◽  
European Beech ◽  
Mining Area ◽  
Polluted Area ◽  
Silver Fir ◽  
Significant Difference ◽  
The Difference ◽  
Area North

Heavy metals are destructive environmental stressors that greatly reduce plant growth and productivity. Here, the content of some heavy metals (Fe, Cu, Zn and Mn) and mineral nutrients (Ca, Mg and K) in silver fir (Abies alba Mill.) and European beech (Fagus sylvatica L.) wood from two sites in the Tarni�a mining area (North-Est Romania) was analyzed. The first site (no. 1) is located near a big tailings dump, whereas the other one (no. 2) is situated 6 km South, in a less polluted area. The purpose of this work was to evaluate the present-date levels of such elements in the investigated biological materials and to compare them. Measurements of heavy metal content in wood were performed with an AAS flame spectrometer, whereas an ICP-OES spectrometer was used for soil and tailings dump samples. The Mn content was higher in the site no. 1 located near the dump, for both species, but the difference was statistically significant only for the European beech trees. The Zn content of samples from the site no. 1 was lower than that corresponding to the second one (no. 2) for both species, but significant for the silver fir only. However, there was not found a significant difference in respect to both iron and copper in the samples collected from the two species and two different sites. Furthermore, the content of Ca and Mg of both species was found higher for the site no. 2, suggesting a better state of nutrition of the investigated trees than of those located near the tailings dump. The content of calcium and magnesium of silver fir was negatively correlated with the diameter of the trees collected from both sites.

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