Treatment of old-growth stands and its effects on birds, ants, and large woody debris: a case study.Author(s): Evelyn L. Bull; Torolf R. Torgersen; Arlene K. Blumton; Carol M. McKenzie; Dave S. Wyland
Source: Gen. Tech. Rep. PNW-GTR-353. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
Publication Series: General Technical Report (GTR)
Station: Pacific Northwest Research Station
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DescriptionAn old-strucutre stand with large amounts of tree mortality was treated to accelerate regeneration and reduce fuel loads but still maintain its function as old growth for selected bird species. The small-diameter (<15 inches in diameter at breast height [d.b.h.]), dead trees were removed as was some of the down wood <15 inches in diameter at the large end. All live trees of any size and all dead trees >15 inches d.b.h were retained.
Vaux's swifts (Chaetura vauxi) and pileated woodpeckers (Dryocopus pileated) continued to use the stand after harvest for nesting and roosting. Brown-headed cowbirds (Molothrus ater) were more than twice as common in the treated stand as in an adjacent unlogged, control stand.
In a comparison before and after harvest in the treated stand, the number of logs increased, the number of logs with ants increased, but the percentage of logs with ants decreased.
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CitationBull, Evelyn L.; Torgersen, Torolf R.; Blumton, Arlene K.; McKenzie, Carol M.; Wyland, Dave S. 1995. Treatment of old-growth stands and its effects on birds, ants, and large woody debris: a case study. Gen. Tech. Rep. PNW-GTR-353. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
KeywordsAnts, down woody debris, old-structure stand, restoration, pileated woodpecker, Vaux's swift, Dryocopus, Chaetura, Molothrus, Camponotus, Formica
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