Arctic Tundra
Location: North of the Arctic
Climate:
Extremely low temperatures (mean <10 degrees Celsius)
Large changes in the amount of sunlight that reaches the surface during various months (range is 0-24 hours)
Strong winds
Very low precipitation (10-50 cm.)
Short growing season (60-100 days)
Soil:
Permafrost present
Unstable due to the freezing and thawing (contraction and expansion, results in soil polygons)
High organic matter, slow decomposition
Solifluction
Low in nutrients
Topography:
Fairly level topography
Snow banks will form in lower areas (protect plant life, act as a wind shelter)
Plant Communities:
Circumpolar plants
Low in species richness
Shrubs: Heaths, Willows, Birch
Herbs: Graminoid, Cotton Grass
Lichens: Reindeer Lichens
Adaptations:
Short Height
Cushion growth form
Perennial
Asexual Reproduction
Dormancy
Animals:
Caribou, Lemming
Human Impact:
Alaskan Pipeline
Anything human related (change) lasts an extremely long time (Rate of change is very very slow!)