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ROUGH WAVE-LIKE HEAPED OVERBURDEN PROMOTES ESTABLISHMENT OF WOODY VEGETATION WHILE LEVELING PROMOTES GRASSES DURING UNASSISTED POST MINING SITE DEVELOPMENT
Frouz, J., O. Mudrak, E. Reitschmiedova, A. Walmsley, P. Vachova, H. Simackova, J. Albrechtova, J. Moradi, and J. Kucera.
Journal of Environmental Management 205:50-58(2018)

At post-mining sites in the Czech Republic in 2003, researchers established plots in which the surface of the heaped overburden was either wave-like or leveled. In a detailed survey of the dominant species in 2015, both Salix caprea and Betula pendu trees occurred more often in wave-like plots than in leveled plots; this was particularly true for trees taller than 1 m, which were absent in leveled plots. In wave-like plots, both woody species occurred mainly on wave slopes while the grass Calamagrostis epigejos occurred mainly in the depressions. The authors speculated that trees were more abundant in wave-like plots than in leveled plots because the waves trapped tree seeds and snow and because the soil porosity was greater in wave-like than in leveled plots. Grasses might have preferred the leveled plots because soil porosity was lower and clay content was higher in leveled than in wave-like plots.



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