Ecosystems: interacting organisms and environment

Connected by energy flow and nutrient cycling

Organized in webs and pyramids

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Energy flow and nutrient cycling

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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

      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

    1. Temperate winter wet Mediterranean
    2. Temperate-Tropical summer wet Monsoonal

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