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1 September 2010 Influence of Cover and Food Resource Variation on Post-Breeding Bird Use of Timber Harvests With Residual Canopy Trees
Molly E. McDermott, Petra Bohall Wood
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Abstract

We investigated avian use of clearcuts and two-age harvests during the post-breeding period in 2006 in the central Appalachians, West Virginia, USA with an information-theoretic approach to model selection. Cover variables appeared to be most important; e.g., vegetative vertical complexity had a strong positive relation with capture rates of mature forest birds and molting adults, as well as physical condition which supports a predator-avoidance hypothesis for habitat use. Basal area was a poor predictor of captures; residual trees near nets tended to depress capture rates. Food variables best explained capture rates for some species groups (e.g., early-successional insectivores and granivores, mature forest nesting adults, molting birds), but post-breeding habitat quality was based primarily on vegetative cover. Habitat use may depend on the bird's physical condition and molt status, and we found evidence for age-specific differences which may impact survival. Our study suggests important links between post-breeding habitat quality, molt status, physical condition, and bird age, and indicates a variety of response variables (relative abundance, survival, body condition) should be measured to assess avian habitat quality during the post-breeding period.

Molly E. McDermott and Petra Bohall Wood "Influence of Cover and Food Resource Variation on Post-Breeding Bird Use of Timber Harvests With Residual Canopy Trees," The Wilson Journal of Ornithology 122(3), 545-555, (1 September 2010). https://doi.org/10.1676/09-050.1
Received: 19 March 2009; Accepted: 1 February 2010; Published: 1 September 2010
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