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The Ecosystem

The Ecosystem. 2.4 Biomes. Assessment Statements. 2.4.1 Define the term biome 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome. 2.4.1 Define the term biome.

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The Ecosystem

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  1. The Ecosystem 2.4 Biomes

  2. Assessment Statements • 2.4.1 Define the term biome • 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome

  3. 2.4.1 Define the term biome • A collection of ecosystems sharing similar climatic conditions.

  4. 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome • Tropical Rainforest • Temperature: 26 C • Rainfall: Over 2500 mm/yr • Insolation (Light Level): High • Distribution: Between the tropics of cancer and capricorn • Structure: Highly stratified (Emergent, Canopy, Understory, Immature, and Herb layers) • Productivity: High

  5. 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome • Desert • Temperature: 45 C • Rainfall: Under 250 mm/yr • Insolation (Light Level): High • Distribution: 30 o N and S • Structure: Little vegetation, organisms highly adapted to low water and fluctuating temperatures • Productivity: Very low

  6. 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome • Tundra • Temperature: Low down to -50 C • Rainfall: Low • Insolation (Light Level): Low • Distribution: High Latitudes • Structure: Plants with leathery leaves or underground storage organs, larger animals with fur • Productivity: Low

  7. 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome • Temperate forest • Temperature: cold winters, hot summers • Rainfall: 500-1500 mm/yr • Insolation (Light Level): varies through year • Distribution: 40 to 60 o N • Structure: Dominated by one species of tree (evergreen or deciduous) bigger shrub layer due to less dense canopy • Productivity: Relatively high

  8. 2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome • Grasslands • Temperature: cold winters, hot summers, fluctuate wildly if removed from the sea • Rainfall: 250-500 mm/yr • Insolation (Light Level): varies through year • Distribution: Almost every continent 16% of the earth’s surface • Structure: Diverse grasses, with a mat of slowly decomposing vegetation • Productivity: Relatively low

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