SLU Artdatabanken
The Swedish University of Agricultural Sciences administers the species
the Swedish Species Observation System (Artportalen) to register and map
the species diversity of Sweden. This is an online portal where
citizens, conservationists, and researchers can report the species they
have observed (https://artportalen.se/). I used a subset of this
databank by filtering in data on pine and only for observations made
between June 2nd of 2020 and June
2nd of 2023. The presence of pine trees was extracted
from this dataset along with the geographical coordinates of the
observations. This process yielded a total of 9359 data points. Since
these data do not include the absence of pine trees, I merged the
absence data from the PLOT network into this dataset (n=71). From now
on, this dataset is referred to as ART.
Environmental data
Current and forecast global environmental data in the form of minimum
temperature (K) and annual precipitation (kg m-2s-1) was sourced from Coupled Model Intercomparison
Project phase 5 (i.e., the CMIP5 multi-model ensemble data,
https://esgf-node.llnl.gov/projects/esgf-llnl/). This project
developed a scientific framework that yielded likely estimates of
environmental data linked to GPS coordinates . The data used for this
project belong to the 50-year forecast data library and these data are
extensively used for the Intergovernmental Panel on Climate Change
Assessment Reports (Appendix 1, Fig. S1.1). CMIP5 was favored over CMIP6
because its estimates are in line the observations, while CMIP6
robustness remains to be tested due to its recent release .