Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Settlements and Landscapes (hierarchy name)
5. landscapes (environments)
6. natural landscapes
7. vegetation
8. plant communities (natural)
9. tundras
10. [tundras by biome]

Anotations

Scope note:

Tundras located in the northern hemisphere, encircling the north pole and extending south to the coniferous forests. Arctic tundras have cold, desert-like conditions, with a growing season from 50 to 60 days.