Use of artificially created douglas-fir snags by cavity-nesting birds
Western Journal of Applied Forestry
By: C. L. Chambers, T. Carrigan, T.E. Sabin, J. C. Tappeiner II, and W.C. McComb
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Abstract
In western Oregon, we created snags by sawing tops off live Douglas-fir (Pseudotsuga menziesii) (n = 821) trees and monitored their condition and use by cavity-nesting birds. We created snags in three silvicultural treatments: modified clearcut stands, two-story stands, and small-patch group-selection stands. We used two snag patterns: clumped and scattered. Created snags averaged 3.8/ha in density, 17 m in height, and 75 cm in diameter. Chainsaw-topped snags were used by cavity nesters within 5 yr of creation. Abundance of excavated cavities increased in all silvicultural treatments (P = 0.0001) and was higher in two-story and clearcut stands than in small-patch stands (P a?? 0.0004). We did not, however, find that snag pattern (clumped v. scattered) affected use by cavity-nesting birds based on abundance of excavated cavities (P > 0.6). We observed excavated cavities in five hardwood species indicating that hardwoods represented an important resource for cavity-nesting birds. Creating conifer snags by topping and retaining hardwoods may retain or increase populations of cavity nesters in areas with low natural snag density.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Use of artificially created douglas-fir snags by cavity-nesting birds |
| Series title | Western Journal of Applied Forestry |
| Volume | 12 |
| Issue | 3 |
| Year Published | 1997 |
| Language | English |
| Contributing office(s) | Forest and Rangeland Ecosystem Science Center |
| Description | p. 93-97 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Western Journal of Applied Forestry |
| First page | 93 |
| Last page | 97 |
| Google Analytic Metrics | Metrics page |