Evergreen shrubs are spreading

Evergreen shrubs, such as lingonberries and crowberries, are increasing their range on the tundra in Arctic environments. The extent of the shrubs has doubled in many areas, according to new research. We have long known that the tundra has become overgrown with deciduous shrubs such as dwarf birch and various species of willows. The new studies are published in the Journal of Ecology.