At this site, you can explore two uneven-aged structure trial plots. The canopy is not divided into distinct layers; instead, the forest has a continuum of different-aged and different-sized trees. The grouping of trees of various sizes is also typical. Trees at different stages of development enable management measures aimed at continuous cover forestry. In uneven-aged forestry, the forest must be harvested often and sparsely enough to maintain the condition and recovery potential of small trees and the undergrowth. Transforming a uniformly-aged spruce stand, managed with low thinning, into an uneven-aged structure is slow and susceptible to wind and bark beetle damage.

The stand was established in 1898 by sowing pine and spruce seeds on slash-and-burn land. Between 1923 and 1993, seven light thinnings were carried out in the stand. The trees on the sites were measured and mapped in 2023.

Marteloscope Punkaharju

The sites are part of the international Marteloscope demonstration site network. The main goal of the sites is to illustrate the ecological and economic impacts of forest management operations. At Marteloscope sites, you can test the effect of selecting trees for removal on the future development of the site using the I+ application.

Network of Marteloscope sites in Europe.

Site information

Punkaharju Marteloscope | Sample plot 1
61.81492355 and 29.33383162
Altitude above sea level 91,1 m

All trees with dbh>5cm and larger measured from the sample plot.

Site information

Punkaharju Marteloscope | Sample plot 2
61.81432198 and 29.33382389
Altitude above sea level 86.6 m

All trees with dbh>5cm and larger measured from the sample plot.