Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (669 KB bytes)

Title: Effects of new forest management strategies on squirrel populations.

Author: Carey, Andrew B.;

Date: 2000

Source: Ecological Applications. 10(1): 1-100; 248-257.

Publication Series: Scientific Journal (JRNL)

Description: Two strategies for managing forests for multiple values have achieved prominence in debates in the Pacific Northwest: (1) legacy retention with passive management and long rotations, and (2) intensive management for timber with commercial thinnings and long rotations. Northern flying squirrels (Glaucomys sabrinus), Townsend's chipmunks (Tamias townsendii), and Douglas' squirrels (Tamiasciurus douglasii) were studied retrospectively in Douglas-fir (Pseudotsuga menziesii) forests managed under the alternative strategies in the Puget Trough of Washington. Flying squirrels were twice as abundant under legacy retention as under intensive management for timber, almost as abundant as in old-growth western hemlock (Tsuga heterophylla) forests on the Olympic Peninsula of Washington, but <50% as abundant as in old-growth Douglas-fir forests in western Oregon. Chipmunks were four times as abundant under intensive timber management, as under legacy retention, but less abundant than in old-growth forests. Abundance of Douglas' squirrels did not differ between strategies. Neither strategy produced the increased abundance of all three species that is an emergent property of late-seral forests. A third strategy holds promise: active, intentional ecosystem management that incorporates legacy retention, variable-density thinning, and management for decadence.

Keywords: Douglas fir, ecosystem management, forest ecology, forest management, Glaucomys sabrinus, managed forest, Pacific Northwest, silviculture, squirrels, Tamias townsendii, Tamiasciurus douglasii, thinning, old growth restoration

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Carey, Andrew B. 2000. Effects of new forest management strategies on squirrel populations. Ecological Applications. 10(1): 1-100; 248-257.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.