Eradication of non-native fish species from some high altitude alpine lakes
The brook trout (Salvelinus fontinalis) is a salmonid originating from North America. This species was introduced in some GPNP lakes in the 1960s when the damage to the ecosystem that could be caused by non-native species was not fully understood.
This is an allochthonous species, in fact, that is to say, a species that colonises an area other than its natural habitat through direct or indirect human action.
Today, scientific knowledge is much more advanced and the International Union for the Conservation of Nature (IUCN) views the introduction of non-indigenous species as the second greatest cause of the drastic loss of biodiversity that is affecting our planet.