GEOG 108 Lecture 31.docx

GEOG 108 Lecture 31.docx - GEOG 108 – Temperate...

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GEOG 108 – Nov 26, 2018 - Temperate Coniferous Forests o Two broad areas of this biome in North America o West side of north America below boreal forest and southeastern USA o West side - dominant species include Douglas fir, red cedar, Sitka spruce, and red wood near coast o Inland – ponderosa pine, Engelmann spruce, and lodge pole pine o Temperate coniferous forests, southeastern USA – dominated by pitch pine, longleaf pine, and slash pine o All of these tree species are adapted to growing on nutrient poor sandy soils and can withstand the effects of fire o Biomass productivity is typically low o Temperature coniferous forest can also be found in northern Japan, and parts of Europe and Asia
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- Temperate Broadleaf and Mixed Forest o This biome is characterized by a moderate climate and deciduous trees o It once occupied much of the eastern half of the united states, central Europe, Korea and china o This biome has been very extensively affected by human activity
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o Dominant trees – maple, beech, oak, hickory, basswood, cottonwood, elm, and willow o The understory of shrubs and herbs in a mature deciduous forest is typically well developed and richly diversified o Many different types of herbivore and carnivores , and some reptiles and amphibians exist here o Brown forest soils characterize temperature deciduous forest ecosystems - Temperature Grasslands, Savannas and Shrublands o In central North America are the grasslands , the tall grass prairie toward the east and the short grass prairie westward]in Europe and Asia some grasslands are called steppes o In south America, grasslands are known as pampas o Prior to modern humans, the tall grass prairie was dominated by species of Bluestem o This particular species dominated much of the tall grass prairie forming dense covers 1.5-2.0 meters tall o Western end of the prairie, where precipitation is less, buffalo grass and other grasses (only a few inches tall) are common o Grassland mammals include smaller burrowing herbivores (prairie dogs, jack rabbits, ground squirrels, and gophers) and larger herbivores such as bison, pronghorn antelope, and elk o
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  • Fall '19
  • Forest, Grassland

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