![]() ![]() As a result, vegetation and lichen present must be drought tolerant. Although the tundra is usually wet in the summer, water is available only in a frozen form most of the year. ![]() Each moisture type supports a different community of vegetation. Low sites are generally wet while high sites are generally dry. ![]() After temperature, microtopography, or small variations in ground conditions, is an important factor in predicting vegetation because microtopography affects soil moisture. The climatic diagram below shows the Tundra Biome annual precipitation (cm) and the the average temperature in dgrees Celsius. Despite low precipitation, permafrost prevents much water from moving into the ground, and low temperatures slow evaporation, often resulting in seasonal wet sites. Most precipitation occurs from June to September, often peaking in August. They have multi-chambered stomachs, similar to that of ruminants like cows, that allows them to ferment and break down this material for more efficient digestion.Barren tundra is characterized by a low mean annual precipitation of 357 mm (14 in.) and low mean annual temperature of -5 ☌ (-0.2 ☏).
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