Skip to main content

Tree mortality after low-intensity prescribed fires in managed Pinus sylvestris stands in southern Finland

Buy Article:

$63.00 plus tax (Refund Policy)


Tree mortality, its causes, and the input of dead charred wood were studied in 11 managed 30-45-year-old Scots pine (Pinus sylvestris L.) stands 1 year after experimental low-intensity prescribed burnings in southern Finland. First, the relationship between fire-induced tree damage and several external variables, e.g. stand density, within-stand wind speed, open-air wind speed, the Finnish Forest Fire Index (FFI) and flame height, was studied. Secondly, the study examined which damage and morphological characteristics best predicted tree mortality. Tree mortality was very variable in the experimental plots, ranging from 0% to 48% on the basis of stem number and from 0% to 41% in terms of wood volume. The input of dead and charred wood decreased with stand age, being 19.4 m3 ha-1 in 30-35-year-old stands, but only 1.7 m3 ha-1 in 45-year-old stands. The input of dead wood was on average 10 m3 ha-1, representing less than 5% of the mean volume before the prescribed fire. The external variables that best explained fire-induced damage were within-stand wind speed, flame height and FFI. Tree mortality was best predicted by charred stem ratio with bark thickness, and by charred stem ratio with tree diameter. The results indicate that prescribed burning that is conducted downwind increases tree mortality and changes subsequent stand structure with increasing within-stand wind speed.

Keywords: Biodiversity; Scots pine; dead wood; fire behaviour; forest fire

Document Type: Research Article


Affiliations: 1: Department of Forest Ecology, University of Helsinki, Helsinki, Finland 2: Finnish Forest Research Institute, Vantaa Research Centre, Vantaa, Finland

Publication date: 2007-01-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more