Environment (Land)
| Land | ||||
| Terrestrial habitat | ||||
| Habitat area | ||||
| Area of older forest |
Calculated from the combined areas of each forest age class defined as being old (> 120 years). | |||
| Area of grassland and shrubland |
Calculated from the area of the following cover types: herbaceous, short shrubland, and tall shrubland. | |||
| Habitat structure | ||||
| Density of large snags |
Many species are expected to decline if snag abundance declines due to the critical habitat that snags provide. The indicator measure is the number of large snags (>25 cm dbh) per 0.25 ha. Snag density associated with simulated landscapes can be estimated using coefficients from Schieck (2009) that relate snag density and occurrence to natural and anthropogenic cover types. These coefficients were estimated using ABMI data from boreal Alberta. The cover types with the largest coefficients were older forest types. | |||
| Percent shrub cover |
Shrubs provide habitat to numerous species and some species are expected to decline in abundance if shrub cover declines. Shrub cover associated with simulated landscapes can be estimated using coefficients from Schieck (2009) that relate percent shrub cover to natural and anthropogenic cover types. These coefficients were estimated using ABMI and landcover data from boreal Alberta. The cover types with the largest coefficients were hardwood forest types, herbaceous, and shrublands. | |||
| LFH |
LFH provides habitat to numerous species. LFH depth (cm) can be estimated from simulated landscape composition using coefficients from Schieck (2009) that relate LFH depth to the area in natural and anthropogenic cover types. These coefficients were estimated using ABMI and landcover data from boreal Alberta. The cover types with the largest coefficients were seismic, fen, and bog. | |||