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Bird Use of Forest Structural Classes in Grand Fir Forests of the Blue Mountains, Oregon

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Abstract:

We sampled breeding birds in 83 stands in the Blue Mountains, northeastern Oregon, 1994–1996, to describe bird use of forest structural classes in grand fir (Abies grandis) forests. We classified stands, based on basal area in different tree-size categories, into six forest structural classes: (1) stand initiation (SI); (2) stem exclusion, open canopy (SEOC); (3) stem exclusion, closed canopy (SECC); (4) understory reinitiation (UR); (5) young forest, multistory (YFMS); and (6) old forest, multistory (OFMS). Most species were detected in all structural classes, but slightly more than onethird of species analyzed (13 of 38) differed in abundance among structural classes (P < 0.004). Cluster analysis, based on structural attributes measured in each stand and weighted by avian abundance, grouped birds with similar habitat associations and allowed us to identify “non-SI associates,” “SI associates,” “structural class generalists,” and “mature forest associates.” We did not identify any species that could be considered strictly “OFMS associates.” With the exception of some SI associates, such as the mountain bluebird (Sialia currucoides) and house wren (Troglodytes aedon), we found little evidence of structural class specialization by birds. In grand fir forests of the Blue Mountains, ecologists and managers should focus on understanding how specific silvicultural prescriptions influence structural attributes that are correlated with avian abundance, rather than on stand age per se. FOR. SCI. 48(2):311–321.

Keywords: Avian abundance; bird–habitat relationships; breeding bird communities; environmental management; forest; forest management; forest resources; forest structure; forestry; forestry research; forestry science; natural resource management; natural resources; neotropical migratory birds; old growth; timber harvest

Document Type: Miscellaneous

Affiliations: 1: Director (Idaho office) Sustainable Ecosystems Institute, 1543 N. Mansfield Place, Eagle, Idaho, 83616, Phone/Fax: (208) 938-4804 rsallaba@sei.org 2: Wildlife and Range Scientist Boise Cascade Corporation, 1917 Jackson Avenue, La Grande, Oregon, 97850, Phone: (541) 962-2046 Robert_Riggs@bc.com 3: 708 4th Street, La Grande, OR, 97850, Phone: (541) 963-6707 wetdog@eoni.com

Publication date: May 1, 2002

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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