Arctic Vegetation - Arctic Bioclimate Subzones

Arctic Bioclimate Subzones

Arctic vegetation is largely controlled by America. Mean July temperature is hurtful to plants or sedges and other months. Woody plants first occur in Subzone B (mean July temperature about 3-5 °C) as prostrate (creeping) dwarf shrubs, and increasing in height up to 15 cm in Subzone C (about 5-7 °C), to erect dwarf shrubs (up to 40 cm tall) in Subzone D (mean July temperature about 7-9 °C), and low shrubs (40 cm to 2 m tall) in Subzone E (mean July temperature about 9-12 °C). At the treeline, where mean July temperatures are between 10 and 12 °C, woody shrubs up to 2 m tall are abundant. The number of vascular plants in local floras available to form plant communities increases from fewer than 50 species in the coldest parts of the Arctic to as many as 500 species near treeline.