Effects of Commercial Thinning on Breeding Bird Populations in Western Hemlock Forests
Bird populations and habitat structure were compared between three commercially thinned and three unthinned western hemlock (Tsuga heterophylla) stands to assess short-term effects of commercial thinning on breeding bird communities. Thinning reduced the density of small trees and snags (≤30 cm dbh)...
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| Veröffentlicht in: | The American midland naturalist 2003-01, Vol.149 (1), p.225-232 |
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| creator | ARTMAN, VANESSA L |
| description | Bird populations and habitat structure were compared between three commercially thinned and three unthinned western hemlock (Tsuga heterophylla) stands to assess short-term effects of commercial thinning on breeding bird communities. Thinning reduced the density of small trees and snags (≤30 cm dbh), but did not affect the density of large trees or snags (>30 cm dbh). The overstory canopy was more open and cover of forbs, grasses and seedlings was higher in thinned than unthinned stands. Winter wrens (Troglodytes troglodytes), dark-eyed juncos (Junco hyemalis), chestnut-backed chickadees (Parus rufescens) and red-breasted nuthatches (Sitta canadensis) were more abundant in thinned than unthinned stands, but total bird density did not differ between thinned and unthinned stands. Commercial thinning thus enhances habitat conditions for some bird species while having minimal effects on other bird species. |
| doi_str_mv | 10.1674/0003-0031(2003)149[0225:EOCTOB]2.0.CO;2 |
| format | Article |
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Thinning reduced the density of small trees and snags (≤30 cm dbh), but did not affect the density of large trees or snags (>30 cm dbh). The overstory canopy was more open and cover of forbs, grasses and seedlings was higher in thinned than unthinned stands. Winter wrens (Troglodytes troglodytes), dark-eyed juncos (Junco hyemalis), chestnut-backed chickadees (Parus rufescens) and red-breasted nuthatches (Sitta canadensis) were more abundant in thinned than unthinned stands, but total bird density did not differ between thinned and unthinned stands. 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| source | BioOne Complete; JSTOR Archive Collection A-Z Listing |
| subjects | Animal populations Aviculture Bird nesting Birds Commercial forests Forest habitats Forest management Forest restoration Forest stands Forests Habitats Notes and Discussion Old growth forests Plantation forestry |
| title | Effects of Commercial Thinning on Breeding Bird Populations in Western Hemlock Forests |
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