Maps and R code from: Marginality indices for biodiversity conservation in forest trees

This dataset provides the raster map of marginality indices for eight European tree species as described in the article "Marginality indices for biodiversity conservation in forest tree". It also provided the R code to compute the marginality indices.

The eight species are the following:

Abies alba Mill. (silver fir)

Fagus sylvatica L. (European beech)

Picea abies (L.) H.Karst. (Norway spruce) 

Pinus halepensis Mill. (Aleppo pine)

Pinus nigra J.F.Arnold (black pine)

Pinus pinaster Aiton (maritime pine) 

Pinus pinea L. (stone pine)

Pinus sylvestris L. (Scots pine)

For each species, a 7z archive of a multi-layered image of the raster maps of the marginality indices is given. Each image has 12 layers:

Layer 1: distribution map of the species

Layer 2: map of the probability of being marginal according to the Maxent model using eight marginality indices and countries as predictors

Layer 3: map of the environmental marginality index, defined as the z-transform of the suitability of each location as predicted by a species distribution model using climatic variables as predictors

Layer 4: map of the segmented distribution according to morphological spatial pattern analysis

Layer 5: map of the area index

Layer 6: map of the gravity index

Layer 7: map of the centroid index

Layer 8: map of the edge index

Layer 9: map of the isolation index

Layer 10: map of the second nearest core index

Layer 11: map of the north/south index

Layer 12: map of the east/west index