期刊
FOREST ECOLOGY AND MANAGEMENT
卷 126, 期 1, 页码 1-12出版社
ELSEVIER
DOI: 10.1016/S0378-1127(99)00078-X
关键词
woodpeckers; uneven-aged management; dead standing trees; irregular shelterwood; old-growth
类别
We studied abundance and tree use (foraging and drumming) of the cavity-nesting woodpecker guild (7 species) in northern Maine to assess effects of uneven-aged forest management (an irregular shelterwood system) on woodpecker populations. Woodpecker abundance in managed and unmanaged hardwood stands showed no difference. Abundance in managed softwood stands was greater than in unmanaged softwood stands. Woodpeckers preferred (use greater than availability) to forage and drum on large-diameter (>30 cm) living trees (hardwood and softwood). Living trees used by woodpeckers, however, were commonly in a state of decline, with characteristics such as fungal conks, broken limbs, and broken tops. When dead trees were used, woodpeckers preferred large-diameter, recently-dead trees. Although we identified tree types preferred by woodpeckers, the abundance of preferred trees in a stand was a poor predictor of woodpecker abundance. The uneven-aged management we studied did not reduce the number of preferred trees or snags to a level that affected woodpecker abundance. (C) 2000 Elsevier Science B.V. All rights reserved.
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