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10+Terrestrial+Biomes - Terrestrial Biomes What you should...

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What you should know after this lecture: Ecosystem vs. biome Main biomes & their characteristics Which factors determine those characteristics - climate (temperature, precipitation) - latitude - soil - disturbances (fire) Terrestrial Biomes
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Biome : - determined by large scale climatic factors - defined by vegetation characteristics Tropical rain forest Tropical savanna Tundra Ecosystem : functional unit of plants, animals & microorganisms and their environment Tropical rain forest Cameroon, Central Africa Tropical rain forest Ecuador, South America
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Terrestrial Biomes 1. Tropical rainforest 2. Tropical dry forest 3. Tropical savanna 4. Desert 5. Mediterranean woodland & shrubland 6. Temperate grassland 7. Temperate forest 8. Boreal forest 9. Tundra 10. Alpine tundra classify by: - dominant vegetation - climate - soil & fire properties Potential distribution (actual distribution affected by human activities)
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Characterizing climate: climate diagrams precipitation months with average min. temp. above freezing temperature Note change in axis scale
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to distinguish biomes, note: - absolute temp. & precipitation - relationship between temp. & precip. (indicates water availability) - # months above freezing
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Whittaker’s Climate Diagram Focus on average temperature & annual precipitation Problem: discards: seasonality; fire; soil conditions affect which biome is present
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most within 10 o latitude low temp. seasonality high rainfall; never < 10 cm /month Tropical Rainforests
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lush vegetation, high biodiversity:
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