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Understanding Energy Flow in Ecosystems

Explore how life in an ecosystem relies on energy sources. Learn how producers create energy for other organisms. Satellite images depict distribution of producers in regions. Consumers obtain energy by consuming living or once-living resources. Discover the role of sunlight and chemicals in energy production.

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Understanding Energy Flow in Ecosystems

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  1. KEY CONCEPT Life in an ecosystem requires a source of energy.

  2. Producers provide energy for other organisms in an ecosystem. • Producers get their energy from non-living resources. • Producers are also called autotrophs because they make their own food. Fig. This satellite image uses chlorophyll abundance to show the distribution of producers in the Western Hemisphere. Dark green areas are heavily forested, while yellow areas have limited vegetation.

  3. Producers provide energy for other organisms in an ecosystem. • Consumers are organisms that get their energy by eating other living or once-living resources. • Consumers are also called heterotrophs because they feed off of different things.

  4. carbon dioxide + water + hydrogen sulfide + oxygen sugar + sulfuric acid Almost all producers obtain energy from sunlight. • Photosynthesis in most producers uses sunlight as an energy source. • Chemosynthesis in prokaryote producers uses chemicals as an energy source. Fig. Chemosynthetic bacteria thrive in many of Yellowstone National Park's hydrothermal pools.

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