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Few invasive alien species in the mountains

Target

1.1 Norwegian ecosystems will achieve good status and deliver ecosystem services.

Indicator

Number of invasive alien organisms in the following major ecosystems: marine and coastal waters, rivers and lakes, wetlands, forest, mountains and cultural landscapes

Are we moving in the right direction? Published by the Norwegian Environment Agency

Few alien species have spread to mountain areas, and ecosystem status with respect to invasive alien species is therefore considered to be good in Norway’s mountains.

Of the more than 1000 alien species that reproduce or are considered to be capable of reproducing in the wild in Norway, only three are associated with mountain ecosystems. These are dwarf mountain pine (Pinus mugo mugo), emperor goose (Anser canagicus) and ice poppy (Papaver croceum). Of these, only the dwarf mountain pine is classfied in the ‘severe impact’ category in the Black List

The emperor goose (which has only been recorded a few times in Norway) and the ice poppy have been categorised as ‘potentially high impact’ species. They do not pose a great threat at present, but could become a problem if environmental conditions change. 

The harsh climate in the mountains often limits which species can survive there. As the climate changes and becomes wetter and warmer, alien species that are found in the lowlands are expected to be able to spread upwards towards the mountains. It is therefore uncertain whether good ecosystem status with respect to invasive alien species will be maintained in the future.