Study

Effects of thinning on structural development in 40-to 100-year-old Douglas-fir stands in western Oregon

  • Published source details Bailey J.D. & Tappeiner J.C. (1998) Effects of thinning on structural development in 40-to 100-year-old Douglas-fir stands in western Oregon. Forest Ecology and Management, 108, 99-113

Actions

This study is summarised as evidence for the following.

Action Category

Thin trees within forests: effects on young trees

Action Link
Forest Conservation
  1. Thin trees within forests: effects on young trees

    A replicated, controlled, paired site study in 1993–1995 in temperate coniferous Douglas-fir Pseudotsuga menziesii forest in western Oregon, USA (Bailey & Tappeiner 1998) found that thinning increased conifer seedling density. Tree seedling density in thinned forest segments (1,433/ha) was greater than in unthinned forest segments (233/ha). Monitoring was in 1993–1995 in 32 pairs of thinned (between 1969 and 1984) and unthinned sites that had regenerated naturally following harvest between 1880 and 1940. Undisturbed old-growth Douglas-fir stands (>200 years) were present for comparison on 20 of the 32 paired sites.

     

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust