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Ecosystems: Food chain


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Excellent powerPoint on food chain.

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Ecosystems: Food chain

  1. 1. Heterotrophic : animals that need to eat other living things . Carcass: a dead animal body Scavengers: animals that eat carcasses. Remains: excrements ,carcasses,leaves,etc. Autotrophic: anything that produces their own food from light, water and nutrients from the soil.
  2. 2. • The food chain is an example of how organisms that live in an ecosystem interact with each other. • Depending on their relationships they can be classified as producers, consumers and decomposers. This is a food chain.
  3. 3. PRODUCERS • Producers, such as trees, feed with sunlight and water. They give nutrients to other living things. We call consumers living things that eat producers. These are examples of producers.
  4. 4. CONSUMERS • Animals are consumers. They are heterotrophic organisms. That´s to say, they eat other living things to obtain nutrients to survive. Mammals: sheep Reptiles: snake
  5. 5. TYPES OF CONSUMERS • • • • There are three types of consumers, according to what they eat: carnivores, herbivores and omnivores. Herbivores are the consumers which feed on producers, like giraffes or horses. Carnivores are the consumers which feed on other consumers. If they hunt, they are hunters, like the leopard. If they feed on carcasses they are scavengers, like the vulture. Omnivores are the consumers which feed on producers, consumers and, sometimes, on decomposers. Herbivore. Carnivore: hunter. Omnivore. Carnivore: scavenger.
  6. 6. DECOMPOSERS • Fungi, and some bacteria, are decomposers. • They obtain energy by decomposing the remains of other living things. • They transform these remains into substances such as water, carbon dioxide and minerals, and release them into the soil. Decomposers: fungi. Decomposers: bacteria.
  7. 7. • A food chain is a relationship between consumers, producers and decomposers. • Producers are the living things that are autotrophic. • Consumers are organisms that feed on producers and other consumers. • Decomposers are the organisms which decompose dead bodies and transform them into nutrients.
  8. 8. 1.Can you name three producers? 2.What is a consumer? Can you name the three types of consumers? 3.What do decomposers do? 4.What do omnivores eat ?
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