Table 1 Variables used in modelling and predicting the occurrence of grouse broods on a landscape scale, within a 500 m radius

Field

Agricultural areas (in map data)

Water

Lakes and rivers (in map data)

Clear-cut area

Mean volume ≤ 4 m³·ha⁻¹ and mineral soil, clear-cut or open area with scattered trees

Open peatland

Mean volume ≤ 4 m³·ha^− 1 and peatland (in map data)

Pine mire

Mean volume ≥ 4 m³·ha^− 1 and dominated by pine (≥ 60% of volume) and peatland (in map data)

Spruce mire

Mean volume ≥ 4 m³·ha^− 1 and dominated by spruce (≥ 60% of volume) and peatland (in map data)

Young pine forest

Mean volume > 4 and ≤ 60 m³·ha^− 1 and dominated by pine (≥ 60%) and mineral soil

Pine forest

Mean volume > 60 and ≤ 150 m³·ha^− 1 and dominated by pine (≥ 60%) and mineral soil

Young spruce forest

Mean volume > 4 and ≤ 60 m³·ha^− 1 and dominated by spruce (≥ 60%) and mineral soil

Spruce forest

Mean volume > 60 and ≤ 150 m³·ha^− 1 and dominated by spruce (≥ 60%) and mineral soil

Young mixed forest

Mean volume > 4 and ≤ 60 m³·ha^− 1 and mixed with deciduous trees (pine and spruce < 60%)

Mixed forest

Mean volume > 60 and ≤ 150 m³·ha^− 1 and mixed with deciduous trees (pine and spruce < 60%)

Old forest

Mean volume > 150 m³·ha^− 1

Built-up areas

Infrastructures, urban areas, buildings and roads (in map data)