Indirect effects of conifer release alternatives on songbird populations in northwestern Ontario

Autor:	John P. Ryder, R. A. Lautenschlager, F. Wayne Bell, John Woodcock
Rok vydání:	1997
Předmět:	Animal science Common species biology Ecology Growing season Forestry Netting biology.organism_classification Dendroica pensylvanica Warbler Songbird
Zdroj:	The Forestry Chronicle. 73:107-112
ISSN:	1499-9315 0015-7546
DOI:	10.5558/tfc73107-1
Popis:	The effects of conifer-release alternatives on songbird densities (determined by territory mapping, mist netting, and banding) in four young (four to seven year old) spruce plantations were examined. Twenty to 38 (block dependent) species bred on each treatment block. Post-treatment data revealed no major treatment-related changes in breeding bird species composition. The mean density of all birds decreased from 6.9 pairs ha−1 pre-treatment, to 6.3 pairs ha−1 in the first post-treatment growing season (P > 0.05). Mean densities of the 11 most common species increased by 0.35 ha−1 on the control plots during the first post-treatment growing season, but decreased on treated plots by 1.1 ha−1 (brush saw), 1.6 ha−1 (Silvana Selective), 0.14 ha−1 (Release®) and 0.72 ha−1 (Vision®). Following the conifer-release treatments, Chestnut-sided Warbler (Dendroica pensylvanica) had lower (P
Databáze:	OpenAIRE
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