Table 2.
Orthogonal factors derived from principal components analysis (with varimax rotation) of BFL data, showing the coefficients for each habitat variable
Variable
|
Standardized rotated principal components | |||||
---|---|---|---|---|---|---|
FC1 | FC2 | FC3 | FC4 | FC5 | FC6 | |
Ln (patch size) | 0.57 | |||||
Asqrt (% forest) | −0.42 | |||||
Ln (edge density) | 0.40 | |||||
Ln (isolation) | 0.34 | |||||
Ln (distance from edge) | 0.67 | |||||
Ln (elevation) | −0.49 | |||||
Ln (canopy height) | 0.69 | |||||
Asqrt (% con. canopy) | 0.41 | |||||
Asqrt (% dec. canopy) | −0.44 | |||||
Asqrt (% con. shrubs) | 0.38 | |||||
Asqrt (% dec. shrubs) | 0.76 | |||||
Asqrt (% saplings) | −0.25 | 0.65 | ||||
Asqrt (% total low veg) | 0.32 | 0.54 | ||||
Eigenvalue | 2.99 | 1.65 | 1.30 | 1.16 | 1.06 | 0.97 |
Cumulative variance explained | 0.23 | 0.35 | 0.46 | 0.55 | 0.62 | 0.71 |
Only coefficients ≥0.25 shown to simplify interpretation of the table. Asqrt, arcsin − square root; % Con. canopy, proportion of coniferous trees in the canopy; % Dec. canopy, proportion of deciduous trees in the canopy; % Con. shrubs, proportion of coniferous shrubs in understory; % Dec. shrubs, proportion of deciduous shrubs in understory; % total low veg, total proportion of ground covered by low vegetation.