Ecosystems: interacting organisms and environment

Connected by energy and nutrients

Studied as pyramids or webs


10% rule for trophic levels

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Energy flow and nutrient cycling X1

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SUBDIVISIONS of Producers, Consumers, Decomposers

      Niche: the role an organism plays in its community

      Habitat: where an organism lives in the environment (map)


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Biomes: Major Ecosystems with

      Similar-appearing Floras and Faunas

      WHY?


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"Biome" = Natural Ecosystems

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      Desert Grassland Deciduous Forest Boreal Forest Tundra Chaparral & Woodland Tropical Deciduous Forest Tropical Rain Forest Tropical Savannah Thorn Scrub Temperate Rainforest Steppe

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Climate varies from low to high elevation, too.

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The Major North America Biomes

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Global distribution of Precipitation

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The SEASONAL distribution of precipitation and temperature also important

            

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