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Reducing invasive and colonising plant species

Throughout the national park and its buffer zone a number of plants have become populated that are considered invasive and colonising species. The former covers non-indigenous species and the latter refers to native varieties (to a varied extent) or those distributed to the mountains from the foothills. These plants are capable of spreading very quickly and displacing local species. Within a few years they can completely dominate an area and turn meadows originally rich in species into single-species uniform stands of invasive and colonising species. Non-native species include, in particular, munk's rhubarb (Rumex alpinus), knotweeds, ornamental jewelweed (Impatiens glandulifera), giant hogweed (Heracleum mantegazzianum), big-leaved lupine and others, whilst the expanding plants are examples such as ragwort (Senecio ovatus), stinging nettle (Urtica dioica), curley dock (Rumex crispus), thistle (Cirsium heterophyllum), plumeless thistle (Carduus personata), etc.

Both propagating groups particularly affect flowing water, the meadows and pastures, tundra ecosystems, the vicinity of roads and fallow areas. Controlling them is a challenging and long-term process, either with the use of chemicals, primarily certain herbicides like Roundup, or mechanical methods, such as scything or removing individual plants. To facilitate this, KRNAP Administration has published an informative guide and provides a consultancy service where appropriate, plus it carries out rather complex projects on eradicating these undesirable plants in the arctic-alpine tundra areas.

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