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Wastes connected with zinc and lead industry are extremely harsh substratums for plant growth. They contain high levels of heavy metals, lack organic matter and are characterized by low porosity resulting in unfavourable air-water conditions (Fragment tekstu).

In recent decades, a lot of species-rich meadows becameabandoned. The long-term lack of frequent mowing caused changes in species composition and habitat conditions of meadow habitats. It is often observed that the abandoned meadow habitats become dominated by Calamagrostis epigejos (Fragment tekstu).

Invasive plant species influence the resident species, communities and ecosystems in many ways. They may reduce species richness and abundance of native biota and decrease their local species diversity, although individual habitats vary considerably in their susceptibility to invasion. Riparian habitats are especially valuable ecological communities with high species richness and are identified as habitats with value for nature conservation. These particular habitats, together with other waterside habitats, are the most endangered and most easily invaded by alien invasive plants. In many riparian habitats, the Reynoutria taxa individuals are common invaders (Fragment tekstu).