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Understanding Food Chains and Webs in Ecosystems

Discover the intricacies of food chains and webs, from producers like plants to scavengers and decomposers. Learn how energy flows through various organisms in terrestrial and aquatic environments. Explore the concept of food webs and their significance in ecosystems.

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Understanding Food Chains and Webs in Ecosystems

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  1. FOOD CHAINS AND WEBS!

  2. What is a Food Chain? • A food chain is the path by which energy passes from one living thing to another.

  3. Producers (Autotrophs) • Prodcers make their own food using PHOTOSYNTHESIS

  4. Consumers (Heterotrophs) • Consumers hunt, gather, and store food because they cannot make their own.

  5. Four Types of Consumers • Herbivores (plant eaters) • Rabbits, squirrels, some birds, most insects • Carnivores (Meat eaters) • Wolves, predatory cats, hawks, eagles • Omnivores (both plants and meat) • Humans, bears • Scavengers (eat dead things) • Vultures

  6. Decomposers • Microorganisms that are able to break down large molecules into smaller parts • Decomposers return the nutrients that are in a living thing to the soil • Examples

  7. Terrestrial Food Chain

  8. Aquatic food chain

  9. What is a Food Web? • A more realistic way of looking at the relationship of plants and animals in an environment • Several food chains linked together

  10. http://www.mrpdarling.com/wp-content/uploads/2012/09/BorealForestFoodWebPic.jpghttp://www.mrpdarling.com/wp-content/uploads/2012/09/BorealForestFoodWebPic.jpg

  11. Food Webs • How many food chains can you make from this food web?

  12. 1. Which organisms are the producers? _________________ _________________ 2. Identify the consumers...C – CarnivoreO – OmnivoreH – HerbivoreP - Planktivore Food Web Graphic - http://staff.harrisonburg.k12.va.us/~gharper/bay/weboflifepage/foodweb.jpg

  13. #3 What would happen if the mussels were to die out due to a disease? How would the zooplankton be affected if the fish population were to increase? How would the whelk population be affected if crabs were removed?

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