Technogenic Ecological Sequences in Mine Tailings from Căpușu Mare, Built between 1969-1975

Aurel Maxim, Mignon Șandor, Adriana Opincariu, Viorela Perțea, Lucia Mihalescu, Vasile Roman

Abstract


Mining industry has a major impact over the ambient environment. An important element of pollution is represented by mine tailings. The rehabilitation of them can be made with natural or artificial methods. The four mine tailings from Căpușu Mare were built during 1968-1985. It were covered by natural grass. In this present study was done a vegetation study in 2015, on the tailing pond II, built during 1969-1975, ie after 40 years. Phytopopulation quantitative study was accomplished by establishing the following phytopopulation and phytocenotic indices: presence, abundance-dominance, frequency, species constant, average abundance-dominance. Stationary research was used by using planimetric method with the help of a metric frame of 1 square meter. After 40 years of the dump closure, the vegetation coverage degree is equal to 82%, and the wooden species occupies approximately 38% of the dump’s surface.The conducted floristic inventory reveals the presence of 49 species as follows: 8 tree species, 5 shrub species and 36 herbaceous species. The average abundance-dominance (ADm) shows that species with the largest coverage of all of analysed reports are: in trees Salix alba (18.4), Populus tremula (14.1) and Robinia pseudoacacia (14.5); in shrubs, Hippophäe rhamnoides (18.7%), and regarding herbaceous species, Phragmites communis (3.2) and Galium album (mollugo).


Keywords


tailing pond, tailing, vegetation study, phytocenotic indices, phytopopulation indices

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