Does current summer temperature contribute to the final shoot length on Pinus sylvestris? A case study at the northern conifer timberline
Abstract:Scots pine (Pinus sylvestris L.) in its natural distribution range is typically classified as a monocyclic species with its predetermined apical growth. It was confirmed by the material sampled in a 50-year-old Scots pine stand from near the northern conifer timberline at Kaamanen, northern Finland that the main controller of the height increment is the mean July temperature of the previous year. Mean monthly temperatures of the current growing season did not correlate significantly with the annual height increment, neither did they improve the fit of the transfer function models predicting annual height increment. This suggests that at least in the northernmost conditions, where the summer is the shortest, the final length of the annual shoot of Scots pine is determined by the summer temperature of the previous year rather than the current year in normal, undisturbed conditions.
Document Type: Research Article
Affiliations: Finnish Forest Research Institute Rovaniemi Research Station, Rovaniemi, Finland
Publication date: 2004-03-01