The tree limit has been monitored since 1915 at some sites in the Swedish mountains. The Department of Ecology, Environment, and Geosciences (EMG) at Umeå University, and Jämtland and Dalarna county boards monitored about 300 sites along the Scandinavian mountain chain for upper elevation trees taller than 2 m (Öberg, 2007).
tree limit boundary
Umeå University (UMU), Jämtland county board (Jämtland), Dalarna country board (Dalarna)