Alaska Arctic Floristic Provinces

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Floristic Provinces are used to explain the east-west variation in species distribution in the Arctic. The Arctic has a relatively consistent core of plant species that occur throughout the circumpolar region, but there is also considerable east to west variation in regional floras, particularly in southern bioclimate subzones. These differences are evident in the species listed in the bioclimate subzones. This variation is due to a number of factors, including different histories related to glaciations, land bridges, and north-south trending mountain ranges, which have influenced the exchange of species between parts of the Arctic. Alaska is included within the Beringian Floristic Province, and includes three of the 23 circumpolar Sub-Provinces: North Beringian Islands, Beringian Alaska, and Northern Alaska (Yurtsev 1994, Walker 2005).

See the Circumpolar Arctic Vegetation Map for a complete description of the floristic provinces:


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