The boreal zone, spanning circumpolar regions in Eurasia and North America, is dominated by coniferous forests, with extensive areas of deciduous growth in Scandinavia, Kamchatka, and Canada. This region, integral to understanding lichen ecology, includes both latitudinal and altitudinal zones influenced by climatic and edaphic factors. Lichens are vital in boreal ecosystems, displaying diverse distributions and adaptations, but remain underexplored in vast areas of Siberia and Canada