GEV 1003 Lecture Notes - Lecture 21: Orographic Lift, Moisture Stress, Mollisol
20 Jan 2018
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Document Summary
Tall grass prairie, continental interior: low rainfall, frequent disturbances by faire, grazing, grasses 3-6 ft tall, best soils: mollisols, decayed//nutrients, and no leaching, highly productive npp almost entirely disturbed by agriculture. Tundra: final and most northern biome (alaska) arctic siberia: past tree line, low shrubs, grasses, flowering herbs, eg sedge often form tussocks (clumps) organic material in soil. = gellisols so they don"t break down easily: water saturated in the summer, moss and lichen, small leaves, extremely slow growth, survive as annuals, or beneath snow when disturbed by oil spill or road, will be wrecked.
