Intactness for a single species is defined as SI = 100 x min(Current, Reference) / min(Current, Reference) and is in the range of 0–100% for each 1 km2 mapping unit. The intactness map for old forest birds is the average of the single-species intactness values within each pixel.
Species richness is the sum of mean occurrence probabilities of multiple species within each 1 km2 mapping unit. The scale of reference for species richness is 1 ha.
We use the species-habitat models to estimate the effects of individual industrial sectors on each species in a given region. We differentiate the following sectors: Agriculture, Forestry, Energy, Rural/Urban, and Transportation. We summarize current and relative abundance for each industrial sector in that region, besides relative abundance in native (undisturbed) land cover types (where current and reference abundances are equal).
The “vase” diagrams highlight the distribution of sector effects within the set of species, here old forest birds.
Sector effects on regional population for a given sector are calculated as the difference between sector specific current and reference abundance, standardized by the total reference abundance in the entire region (including all sectors and native land cover types).
Sector effects on population under footprint for a given sector are calculated as the difference between sector specific current and reference abundance, standardized by the reference abundance in that sector.
Per unit area effects are calculated from the regional population effects, but further divided by the proportion of the sector specific footprint in the region. The corresponding graphs show the area of the sector’s footprint as the width of the bars, and the per unit area effect as the height of the bars. The area of the bar corresponds to the regional sector effect.