Presentation on theme: "Energy flows through ecosystems."— Presentation transcript:
1 Energy flows through ecosystems. Chapter 1Section 3
2 Living things capture and release energy. Producer: an organism that captures energy and stores it in food as chemical energyMost energy enters an ecosystem through photosynthesisIn water – photosynthetic bacteria and algae
3 Living things capture and release energy. Consumers: organisms that get their energy by eating other organismsPrimary consumers eat the producersSecondary consumers eat the primary consumersTertiary consumers eat the secondary consumers
4 Living things capture and release energy. Decomposers: organisms that break down dead plant and animal matter into simpler compoundsUse the last bit of energy from once-living matterReturn matter to soil or water where it may be used again and again
5 Models help explain feeding relationships. Food Chain: describes the feeding relationship between a producer and a single chain of consumers in an ecosystem
6 Models help explain feeding relationships. ProducercattailsPrimary ConsumercaterpillarSecondary ConsumerfrogTertiary consumerheron
7 Models help explain feeding relationships. Food Web: model of the feeding relationships between many different consumers and producers in an ecosystemContains many overlapping and interconnected food chains
9 Available energy decreases as it moves through an ecosystem. Energy pyramid: model that shows the amount of energy available at each feeding level of an ecosystemEnergy is lost as it moves up the pyramid so each level gets smaller
10 Available energy decreases as it moves through an ecosystem.
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