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Table 1 Environmental variables determined either from a GIS based forest inventory or small scale measurements in the forest

From: Edible dormice (Glis glis) avoid areas with a high density of their preferred food plant - the European beech

Source Variable Abbreviation Unit
GIS based Altitude “alt” m above sea level
100 m Radius Forest age “age” years
Fagus sylvatica density “fag” %
Conifer density “conifers” %
Slope ”slope” degrees
Small scale Canopy closure “can” 25%, 50%, 75%, 100%
30 m Radius Girth of nest-box tree at breast height “girth” cm
  1. Canopy closure was measured by partitioning the space around the crown into four quadrants and considering the connection between this crown and neighboring trees. The variable is equal to 100%, if all four quadrants are connected