| Circumpolar Arctic | Alaska Arctic | Upper Kuparuk River Region | Imnavait Creek Area | Toolik Lake Area | Toolik Lake Grid | Imnavait Creek Grid |
Barrens |
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B1. Cryptogam, herb barren
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1. Anthropogenic barren 2. Lichens on rock
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1. Unvegetated Barrens 2. Lichens on rocks
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1. Anthropogenic barren 2. Lichens on rock
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1. Anthropogenic barren 2. Lichen on rock
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1. Barren 2. Lichens on rocks
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B2. Cryptogam barren complex (bedrock)
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B2.1. Lichens on lava (Seward Peninsula)
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3. Partially vegetated barren
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3. Partially or sparsely vegetated
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3. Partially vegetated barrens and revegetated disturbed areas
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3. Partially vegetated barren
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3. Partially vegetated
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B3. Noncarbonate mountain complex
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B3d.1. Acidic mountain complexes (St Lawrence I.)
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B3e.1. Acidic mountain complexes (Brooks Range) B3e.2. Acidic mountain complexes (NW Alaska) B3e.3. Acidic mountain complexes (Kuskokwim Mtns.)
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B4. Carbonate mountain complex
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B4d.1. Nonacidic mountain complexes (Seward Peninsula) B4d.2. Nonacidic mountain complexes (St. Lawrence I.)
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B4e.1. Nonacidic mountain complexes (Brooks Range) B4e.2. Nonacidic mountain complexes (NW Alaska)
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Graminoid tundras |
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G1. Rush/grass, forb, cryptogam tundra
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G2. Graminoid, prostrate dwarf-shrub, forb tundra
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G3. Non-tussock sedge, dwarf-shrub, moss tundra
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G3.1. Moist nonacidic tundra (N. Arctic Coastal Plain) G3.2. Moist nonacidic tundra (St. Lawrence I.) G3.3. Moist nonacidic tundra (Arctic Foothills, Seward P.)
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5. Nontussock-sedge, dwarf-shrub, moss tundra
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5. Moist nonacidic tundra
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5. Nontussock sedge, dwarf-shrub, moss tundra
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5. Nontussock-sedge 6. Nontussock-sedge, horsetail 7. Nontussock-sedge, Cassiope
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5. Other mainly nonacidic mesic tundra
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G4. Tussock-sedge, dwarf-shrub, moss tundra
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G4.1. Tussock tundra (entire map) G4.2. Lichen-rich tussock tundra (Seward Peninsula) G4.3. Tussock tundra on sands (Arctic Coastal Plain)
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4. Tussock-sedge, dwarf-shrub, moss tundra
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4. Moist acidic tussock tundra
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4. Tussock sedge, dwarf-shrub, moss tundra
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4. Tussock-sedge
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4. Acidic mesic tussock tundra
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Prostrate-shrub tundras |
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P1. Prostrate dwarf-shrub, herb tundra
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10. Prostrate dwarf-shrub, sedge, forb, fruticose-lichen tundra (nonacidic) 9. Prostrate dwarf-shrub, forb, fruticose-lichen tundra (acidic)
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10. Nonacidic dry tundra
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10. Prostrate dwarf-shrub, sedge, forb, fruticose-lichen tundra (nonacidic) 9. Prostrate dwarf-shrub, fruticose-lichen tundra
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12. Prostrate dwarf-shrub (acidic) 13. Prostrate dwarf-shrub (Dryas octopetala) 14. Prostrate dwarf-shrub (Dryas integrifolia)
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11. Dry acidic tundra
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P2. Prostrate/hemiprostrate dwarf-shrub tundra
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P2.1. Dry tundra (St Matthew Island)
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11. Hemi-prostrate dwarf-shrub, fruticose-lichen tundra 12. Hemi-prostrate and prostrate dwarf-shrub, forb, moss, fruticose-lichen tundra
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11. Snowbeds 9. Acidic dry tundra
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11. Hemi-prostrate and prostrate dwarf-shrub, forb, moss, fruticose-lichen tundra 12. Hemi-prostrate dwarf-shrub, fruticose-lichen tundra
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15. Hemi-prostrate dwarf-shrub (acidic) 16. Hemi-prostrate dwarf-shrub (snowbed < 1m) 17. Hemi-prostrate dwarf-shrub (nonacidic) 18. Hemi-prostrate dwarf-shrub (warm snowbed)
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12. Acidic Castet snowbeds 13. Acidic strips with Castet 14. Dry hemi-prostrate Betnan
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Erect-shrub tundras |
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S1. Erect dwarf-shrub tundra
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S1.1. Shrubby tussock tundra (NE Alaska) S1.2. Dwarf-shrub, lichen tundra (NW Alaska) S1.3. Dwarf-shrub tundra on volcanic rock (Y-K Delta) S1.4. Dwarf-shrub, lichen tundra (Kuskokwim Mountains)
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13. Dwarf- to low-shrub, sedge, moss tundra
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12. Dwarf-shrub tundra
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13. Dwarf-shrub or low-shrub, sedge, moss tundra
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19. Dwarf to low-shrub (birch) 20. Dwarf to low-shrub (willow)
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15. Betnan-Erivag dwarf shrub 16. Salpul-Carbig dwarf shrub 17. Betnan-Rubcha dwarf shrub 18. Low shrub tundra 19. Salpul-Eriang water tracks
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S2. Low-shrub tundra
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S2.1. Willow-birch tundra (entire map) S2.2. Alder shrublands (entire map)
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14. Low to tall shrublands
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13. Low and tall shrublands
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14. Low and tall shrublands
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21. Low to tall shrublands (birch) 22. Low to tall shrublands (willow) 23. Low to tall shrublands (water-track) 24. Low to tall shrublands (riparian)
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Wetlands |
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W1. Sedge/grass, moss wetland
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W1.1. Wet acidic coastal complex (N. Alaska) W1.2. Wet nonacidic coastal complex (N. Alaska)
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W2. Sedge, moss, dwarf-shrub wetland
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W2.1. Wet acidic complex (N. Alaska, Seward, P.) W2.2. Wet nonacidic coastal complex (N. Alaska)
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W3. Sedge, moss, low-shrub wetland
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W3.1. Wet acidic complex with tussock tundra (W. Alaska) W3.2. Wet acidic complex with dwarf-shrub tundra (lower parts of Y-K Delta) W3.3. Wet acidic complex with low-shrub tundra (Y-K Delta) W3.4. Wet acidic complex with dwarf shrub tundra (inland parts of Y-K Delta) W3.5. Wet acidic complex (Nunivak I.) W3.6. Wet nonacidic complex (warmer parts of NW Alaska) W3.7. Wet coastal saline tundra (Y-K delta)
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6. Sedge-moss tundra (poor fens) 7. Sedge-moss tundra (fens) 8. Water and herbaceous marsh
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6. Poor fens 7. Fens 8. Water and herbaceous marsh
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6. Sedge-moss tundra (poor fens) 7. Sedge-moss tundra (fens) 8. Water and herbaceous marsh
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10. Unvegetated water 11. Herbaceous marsh 8. Sedge-moss tundra (poor fens) 9. Sedge-moss tundra (fens)
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10. Water 6. Wet raised microsites 7. Poor fen 8. Fen 9. Herbaceous marsh
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