Supplementary material 1 from: Wasowicz P, Óskarsdóttir G, Þórhallsdóttir ÞE (2025) Lodgepole pine (Pinus contorta Douglas ex Loudon) invasion in subarctic Iceland: evidence from a long-term study. NeoBiota 97: 47-66. https://doi.org/10.3897/neobiota.97.134047

Climatic diagrams and data for the measured variables, including EOO, tree count, and tree density