1.3 Food Webs - PowerPoint PPT Presentation

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1.3 Food Webs

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  1. 1.3 Food Webs

  2. Goals • Recognize that consumers eat a variety of food sources for energy, many overlapping with other other consumers. • This linking together of food chains are called food webs. • Consumers must compete for food sources. • Populations of species can change over time.

  3. How it really is • Animals must work to get energy from food. • Sometimes prey may have different types of predators. • The predators must compete to get that food. • At the same time, those animals may have multiple predators. • These linking food chains are called food webs.

  4. Examples

  5. Examples

  6. Examples

  7. Examples

  8. Worst case scenarios • Food webs can change drastically if specific organisms are increased, decreased, or removed. • Organisms could be affected by diseases, natural disasters, human disasters, human involvement, and other reasons. • Let’s discuss the cane toad.

  9. Australia’s sugar cane

  10. Sugarcane toad

  11. Eating habits

  12. Greyback cane beetle