Table 1 Environmental variables used to measure hypothesized environmental drivers of body size patterns in grizzly bears within Alberta, Canada
Hypothesized environmental driver and measurement variable | Units | Measurement location(s)§ | Temporal scale(s)†|
|---|---|---|---|
A. Regional habitat productivity | Â | Â | Â |
  Temperature (Winter, Spring, Summer) | °C | home range | 1971-2000 |
  Precipitation (Winter, Spring, Summer) | mm | home range | 1971-2000 |
  Ecosystem | categories | telemetry | C t-1 |
B. Inter-annual environments (deviations) | Â | Â | Â |
  Temperature (Winter, Spring, Summer) | °C | home range | Bt-1, t 0, t+1 & Ct-1, t 0 |
  Precipitation (Winter, Spring, Summer) | mm | home range | Bt-1, t 0, t+1 & Ct-1, t 0 |
C. Local habitat quality | Â | Â | Â |
  Shrub habitat (quadratic) | % | telemetry | C t-1 |
  Canopy cover (quadratic) | % | telemetry | C t-1 |
  Variation in canopy cover | % | telemetry | C t-1 |
  Deciduous canopy cover (quadratic) | % | telemetry | C t-1 |
  Forest age (quadratic) | years | telemetry | C t-1 |
  Forest age variation | years | telemetry | C t-1 |
  Regenerating forest habitat (quadratic) | % | telemetry | C t-1 |
  Variation in regen. forest age | years | telemetry | C t-1 |
  Soil wetness (quadratic) | index | telemetry | C t-1 |
D. Human footprint & activity | Â | Â | Â |
  Private lands | % | telemetry | C t-1 |
  Protected area | % | telemetry | C t-1 |
  Mortality risk | index | telemetry | C t-1 |
  Safe harbour habitat | index | telemetry | C t-1 |
  Linear feature density | km/km2 | telemetry | C t-1 |
  Distance to human feature | m | telemetry | C t-1 |
  Distance to active energy well | m | telemetry | C t-1 |
E. Landscape change | Â | Â | Â |
  Annual rate of habitat change | % | telemetry | C t-1 |