 Soviet agriculture on Svalbard has had a significant impact on the archipelago's ecosystem, through both intentional and accidental introduction of alien species.An example of the former can be found in Pyramiden, where Svalbard reindeer can be seen grazing on the central square's overgrown lawns, in which Ukrainian grass grows on dark, fertile soil likewise imported from Ukraine.An example of the latter is the southern vole, introduced in Grumant – a town founded in 1912 and abandoned in 1965, with a peak population of about eleven hundred.