Amount and structural characteristics of coarse woody debris (CWD) were studied in 44 stands of old-growth and managed coniferous forests in Finnish Lapland. The average volume of CWD in old-growth forests varied from 19 m3 ha-1 in pine forests to 60 m3 ha-1 in herb-rich spruce-dominated forests. The volumes of living and dead timber were highly correlated, the most productive sites having the highest volumes. In old-growth forests about 60-70% of the CWD was logs, 30-40% standing dead trees and snags, and 3.5-7% stumps and branches. The amount of CWD decreased considerably in clear-cutting, but increased or remained the same in seed-tree and selective cuttings in the short term. However, the accumulation rate of new dead material was greatly reduced after cutting. In 40-year-old seed-tree cutting areas the new supply of CWD, created by recent disturbance and mortality, was less than 1% of the respective amount in old-growth forest. All cutting methods reduced standing dead trees and snags considerably.
|Number of pages||11|
|Journal||Scandinavian Journal of Forest Research|
|Publication status||Published - 1998|
|MoEC publication type||A1 Journal article-refereed|
Field of science
- Ecology, evolutionary biology