Actual and potential tree-line in the North Atlantic region, especially in Greenland and the Faroes

Betula pubescens Ehrh. s.l. is the only forest-forming tree-species which has spread naturally to Iceland and southwesternmost Greenland. No trees have immigrated naturally to the Faroe Isles. Afforestation experiments and gardening have resulted in successful introduction of several tree species. Recent experiments comprise planting of Rocky Mountains tree-line species in SW-Greenland northward to Søndre Strømfjord (67°N), and the introduction to the Faroe Isles (62°N) of trees and shrubs from cool temperate forests of the southern hemisphere, e.g. Nothofagus spp. and Embothrium coccineum Forst. (Proteaceae).