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Table 3.1. Habitat variables used in correlation and regression comparison with territory size (minimum convex polygon), clutch size (eggs/nest), fledged young (number/nest), and mortality (average adult deaths/week) at Hinton, Alberta, 1993–98. Variable name Definition Mean tree dbh Mean dbh of all trees ≥10 cm dbh % deciduous + mixed % deciduous forest + % mixed forest % lowland spruce % lowland spruce forest % upland coniferous % spruce forest + % pine forest % upland % spruce + % pine + % mixed + % deciduous; ≥pole seral % pole + mature + old % forest ≥30 years old % non-forest + young % forest <30 years old or non-forest Tree density trees ≥10 cm dbh/ha % forest cover % forest >6% tree cover Large dead tree density Density dead trees ≥25 cm dbh/ha Potential winter foraging substrate Density injured live trees + hard snags/stubs, ≥20 cm density dbh/ha Dead tree density Dead trees (snags and stubs) >10 cm dbh/ha Medium tree density Trees ≥20 cm dbh/ha Large tree density Trees ≥25 cm dbh/ha % trembling aspen % trembling aspen in tree species composition of MCP territory area % white spruce % white spruce in tree species composition of MCP territory area % trembling aspen + white spruce % trembling aspen + % white spruce in tree species composition of MCP territory area % tall stands % stands ≥18 m height % stands ≥7 m) % stands ≥7 m height Mean stand height Mean stand height % closed stands % stands >25% canopy closure Mean canopy closure Mean stand canopy closure % ≤50 years % stands ≤50 years old % >75 years % stands >75 years old % >100 years % stands >100 years old Mean stand age Mean stand age Mean cavity tree dbh Mean dbh of all cavity trees Cavity tree density Cavity trees/km2 Edge index Length of edge between pole or older forest and nonforest/young forest in km/cumulative territory area in km2 Access index Length of linear corridors (roads, geophysical exploration lines, right of ways) in km/cumulative territory area in km2 Fragmentation index Edge + access length in km2/cumulative territory area in km2 Potential cavity tree density Live trembling aspen/balsam poplar with decay + dead trees ≥30 cm dbh/km2

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Pwp 2001 04 rpt phdthesis pileatedwoodpeckerhabitatecologyinabfoothills  

http://foothillsri.ca/sites/default/files/null/PWP_2001_04_Rpt_PhDThesis_PileatedWoodpeckerHabitatEcologyinABFoothills.pdf

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