Table 1 Stand parameters and isolation metrics of studied forest patches.
Parameter | Type of parameter | Description | Log-transformed | Range | Mean ± SD |
|---|---|---|---|---|---|
Forest area | Fragmentation variable | Total area of forest patch (in hectares) | Yes | 0.38–582.33 | 37.28 ± 89.52 |
Forest age | Stand parameter | Mean age of dominant tree species in main stand storey (in years) | No | 10–112 | 58.18 ± 24.30 |
Share of dominant species | Stand parameter | Expressed on the integer scale of 0–10 (with 10 being the highest result), the share of dominant tree species in main stand storey | No | 2–10 | – |
Stand density | Stand parameter | Mean density of forest stand (representing percentage of forest bottom shaded by the tree canopy) (in %) | No | 30–100 | 66.13 ± 15.80 |
Coniferous species | Stand parameter | Percentage of coniferous species in main stand storey (in %) | No | 0.00–100.00 | 21.01 ± 26.04 |
Shape index (SI) | Fragmentation variable | Shape Index of forest stand | Yes | 1.110–3.528 | 1.790 ± 0.504 |
Nearest neighbour distance (NND) | Fragmentation variable | Shortest straight-line distance between a focal patch and its nearest neighbour (in m) | Yes | 16.53–3509.19 | 269.26 ± 701.36 |
Proximity index (PROX) | Fragmentation variable | Sum, over all patches whose edges are within the 2.5 km radius of the focal patch, of each patch size divided by the square of its distance from the focal patch | Yes | 0.00–1845.83 | 78.86 ± 251.92 |
