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Environmental Science Chapter 1 Section 2 Energy throughout Ecosystems • Producers • Consumers – four types - herbivores - carnivores - omnivores - scavengers • Decomposers Producers • – use sunlight directly to make food through photosynthesis. Herbivores • Eat only plants to get energy Carnivores • Gets energy from killing and eating other animals Omnivores • Eat both plants and animals to get energy Scavengers • Get their energy from finding and eating dead animals and plants Decomposers • Break down dead organisms as well as their waste products, into elements that can be used Food Chain • Graphic representation of how the energy in food molecules flow from one organism to another • Less accurate than food webs because simple food chains rarely occur in nature Algae fish bear Food Web • Made up of food chains • Much more realistic and complex than simple food chains • Arrows go from prey to predator Food Web Notice which direction the arrows go in Energy Pyramid • Producers are at the bottom • The number of organisms decreases as you go up the pyramid • Only energy stored in the tissues of an organism can be transferred to the next level • Only 10% of the energy moves from one level to the next Use your red pen • Why is a food chain an insufficient representation of energy flow throughout an ecosystem? • Read pg 12-13 • On you notes, define habitat and niche • Also, state why it is important to make sure that the natural balance in an ecosystem is maintained?