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Old-Growth and Mature Forests Near Spotted Owl Nests in Western Oregon

William J. Ripple, David H. Johnson, K. T. Hershey and E. Charles Meslow
The Journal of Wildlife Management
Vol. 55, No. 2 (Apr., 1991), pp. 316-318
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3809156
Stable URL: http://www.jstor.org/stable/3809156
Page Count: 3
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Old-Growth and Mature Forests Near Spotted Owl Nests in Western Oregon
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Abstract

We investigated how the amount of old-growth and mature forest influences the selection of nest sites by northern spotted owls (Strix occidentalis caurina) in the Central Cascade Mountains of Oregon. We used 7 different plot sizes to compare the proportion of mature and old-growth forest between 30 nest sites and 30 random sites. The proportion of old-growth and mature forest was significantly greater at nest sites than at random sites for all plot sizes (P ≤ 0.01). Thus, management of the spotted owl might require setting the percentage of old-growth and mature forest retained from harvesting at least 1 standard deviation above the mean for the 30 nest sites we examined.

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