IDRIJA UNESCO GLOBAL GEOPARK
Invasive non-native species are one of the biggest threats to biodiversity as their ability to spread rapidly threatens the existence of native species by displacing them or by introducing diseases and parasites to which native species are not resistant. They can also completely change inter-species relationships and nutrient cycling, as well as physical and chemical factors. As well as havng negative impact on nature, they can also pose a threat to human health: for example, the common ragweed is an allergenic species. They also affect the economy: invasive non-native fungi threaten tree species, and some species, such as the narrow-leaved ragwort, have a negative impact on grazing livestock.
Invasive non-native plants are typically extremely successful in colonising vacant, degraded land, where they spread rapidly and form monocultures. These problems are only increasing with the growth of international trade, transport and tourism and, ultimately, climate change.
So far, several stands of invasive non-native plants have been observed in the Upper Idrijca Landscape Park, especially at the entry point in Podroteja, at the Rake water channel, and in the vicinity of Lajšt. All sites have been entered in the Invasives web portal.
A 2023–2028 Action Plan for the control of invasive non-native species in the Upper Idrijca Landscape Park is also under preparation.
In the list below, you can learn about invasive non-native plant species in the Upper Idrijca Landscape Park.