Dataset of Local seed sourcing strategies in Spain

Strict-sense local seed-sourcing strategy (SSL) was defined for each deployment zone as the use of autochthonous populations pertaining to the same region of provenance for each species. Wide-sense local seed-sourcing strategy (WSL) was defined as the use of the pool of regions of provenance with a suitable climatic niche in each zone.

Niche modelling was used to obtain the climate-predicted distribution of the species based on the actual presence and the climate (assuming no restrictions to dispersal and no human influence). Nine climatic variables were considered: mean annual (P), winter (WP), and summer (SP) precipitation, mean annual temperature (T), minimum temperature of the coldest month (MTC), maximum temperature of the warmest month (MTW), growing degree days (t>5°) (DD), total number of months under frost (t<0º) (F), duration of the drought period in months (P<2T) (DP). These variables have been used for modelling niche distribution of different forest species in Spain. A similarity index was obtained based on the Mahalanobis climatic distance (using the same set of climatic variables that in the niche modelling estimation, among the points with presence of the region of provenances and the points of each deployment zone. Based on this similarity the regions of provenance were classified as suitable or not for each deployment zone.