A prominent stepwise advance of the tree line in north-east Finland
Tuomas Aakala, Pertti Hari, Sigrid Dengel, Sarah L. Newberry, Toshie Mizunuma and John Grace
Article first published online: 26 AUG 2014 | DOI: 10.1111/1365-2745.12308
Our study demonstrates a peculiar stepwise advance of a tree line in northern Fennoscandia. A positive relationship between individual tree growth and temperature was not reflected at the population level, and factors deemed important in earlier studies could not explain the advance. These findings suggest complex tree line dynamics, in which biotic agents may mediate tree line responses to environmental change.