Reproductive success of cavity-nesting birds in partially harvested woodlots
Cavity-nesting birds are dependent on large declining and dead trees that are frequently removed during partial harvesting. We compared breeding densities, nest survival, nest site characteristics, food abundance, and reproductive parameters of six species of cavity-nesting birds in
partially harvested and reference woodlots in southwestern Ontario, Canada. Silvicultural practices significantly altered woodlot structure, with treatment-specific effects on bark arthropod biomass, fledging dates for the Red-bellied Woodpecker (
Melanerpes carolinus (Linnaeus, 1758)), and site suitability for the Yellow-bellied Sapsucker (Sphyrapicus varius (Linnaeus, 1766)). Red-bellied Woodpecker, Downy Woodpecker (Picoides pubescens (Linnaeus, 1766)), and Hairy Woodpecker (Picoides villosus (Linnaeus,
1766)) experienced lower breeding densities in recently cut sites. Daily survival rates were generally greater for nests positioned higher up in large trees and for Northern Flicker (Colaptes auratus
(Linnaeus, 1758)) nests excavated in healthy and hard wood. Conversely, the Black-capped Chickadee (Poecile atricapillus (Linnaeus, 1766)) had higher daily survival rates in low, small trees (<10 cm
diameter at breast height) and sites with lower arthropod abundance. We conclude that although partial harvesting has the potential to decrease cavity-nesting bird breeding densities, conscientious cavity tree retention during harvest may provide suitable nesting sites that maintain high rates
of nest success, regardless of the silvicultural treatments that we examined. However, further research is required to monitor these trends beyond a single harvesting rotation.
Document Type: Research Article
Environmental and Life Sciences Graduate Program, Environmental Science Centre, 1600 West Bank Drive, Trent University, Peterborough, ON K9J 7B8, Canada.
Biology Department, Environmental Science Centre, 1600 West Bank Drive, Trent University, Peterborough, ON K9J 7B8, Canada.
Ontario Ministry of Natural Resources, 659 Exeter Road, London, ON N6E 1L3, Canada.
Publication date: May 28, 2011
More about this publication?
Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Terms & Conditions
- Sample Issue
- Reprints & Permissions
- ingentaconnect is not responsible for the content or availability of external websites