A Survey of Douglas-fir Dwarf Mistletoe Brooms Used for Nests by Northern Spotted Owls on the Applegate Ranger District and Ashland Resource Area in Southwest Oregon

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Abstract:



A survey was done to provide forest managers in southwest Oregon with information about characteristics of Douglas-fir dwarf mistletoe (Arceuthobium douglasii) brooms used for nests by northern spotted owls (Strix occidentalis var. caurina). Data were collected on 35 nest brooms and nest trees. Site, stand, and mistletoe data were collected in variable-radius plots in a 20 ac area around 11 of the nest trees. On average, half the nest trees' crowns were occupied by brooms. Douglas-fir trees in variable radius plots immediately surrounding the nest trees were more heavily infected than trees in neighboring plots. The majority of owl nests were in Type 2 and 3 brooms. Few nests were in Type 1 brooms even though they were the most common broom type. The majority of nests were in brooms in the lower third of the tree crowns and on the lower to middle third of the slope. Survey results were used to make recommendations for managing infected trees and stands for current and replacement spotted owl nest habitat in the survey area. West. J. Appl. For. 18(2):115–117.

Keywords: Douglas-fir; Douglas-fir dwarf mistletoe; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; northern spotted owl; spotted owl nests; wildlife habitat

Document Type: Miscellaneous

Affiliations: 1: US Fish and Wildlife Service, 911 NE 11th Avenue, Portland, OR, 97232, 2: 2-B Forests, P.O. Box 3397 Applegate, OR, 97530,

Publication date: April 1, 2003

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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