Kata Kunci Pencarian:
- Daftar taman nasional di Amerika Serikat
- Alaska–St. Elias Range tundra
- List of tundra ecoregions
- Pacific Coastal Mountain icefields and tundra
- Nearctic realm
- Interior Alaska–Yukon lowland taiga
- List of ecoregions in Canada (WWF)
- Copper Plateau taiga
- Alaska Peninsula montane taiga
- List of ecoregions in the United States (WWF)
- Mammoth steppe
