| 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. |
| Genre: | Article |
| ProdID: | 1015855 |
| Citation Author: | Chambers, C. L.; Carrigan, T.; Sabin, T. E.; Tappeiner, J. C., II; McComb, W. C. |
| Citation Contributing Office: | Forest and Rangeland Ecosystem Science Center |
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| Citation End Page: | 97 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Western Journal of Applied Forestry |
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| Citation Number Of Pages: | 5 |
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| Citation Phsyical Description: | p. 93-97 |
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| Citation Search Results Text: | Use of artificially created douglas-fir snags by cavity-nesting birds; 1997; Article; Journal; Western Journal of Applied Forestry; Chambers, C. L.; Carrigan, T.; Sabin, T. E.; Tappeiner, J. C., II; McComb, W. C. |
| Citation Start Page: | 93 |
| Citation Volume: | 12 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Use of artificially created douglas-fir snags by cavity-nesting birds; 1997; Article; Journal; Western Journal of Applied Forestry; Chambers, C. L.; Carrigan, T.; Sabin, T. E.; Tappeiner, J. C., II; McComb, W. C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
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