Breeding bird responses to three silvicultural treatments in the Oregon Coast Range

  • Published source details Chambers C.L., McComb W.C. & Tappeiner II J.C. (1999) Breeding bird responses to three silvicultural treatments in the Oregon Coast Range. Ecological Applications, 9, 171-185.


This study is summarised as evidence for the following.

Action Category

Use patch retention harvesting instead of clearcutting

Action Link
Bird Conservation
  1. Use patch retention harvesting instead of clearcutting

    In McDonald-Dunn Forest, Oregon, USA, a replicated, controlled study (Chambers et al. 1999) found that patch-group-harvested stands (33% of tree volume removed in 0.2 ha patches) retained an old forest-associated bird composition more similar to that of control (unharvested, old-growth Douglas-fir Pseudotsuga menziesii) stands, compared to two-story (66% of wood removed) and modified clearcut (1.2 trees retained/ha) stands. Of ten abundant forest species in patch group stands, five restricted-range species declined in modified clear-cut and two-story harvested stands, whilst nine mostly habitat generalists species increased in these two treatments. Seven to 11 stands of each treatment were studied, with birds surveyed in the breeding season prior to, and in the two years after, timber harvest (1989-1993).


Output references
What Works 2021 cover

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, 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 21

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 ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust