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Food Chains & Webs

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Food Chains & Webs

  1. 2. Food Chain A path of food consumption beginning with the sun. Example: Sun Grass Rabbit Hawk Bacteria
  2. 3. Tropic Levels <ul><li>Level of consumption in a food chain. </li></ul><ul><ul><li>Autotrophs or Producers </li></ul></ul><ul><ul><li>Herbivores or Primary Consumers </li></ul></ul><ul><ul><li>Carnivores or Secondary Consumers </li></ul></ul><ul><ul><li>Decomposers </li></ul></ul>
  3. 4. Autotrophs <ul><li>or Producers make their own food through photosynthesis. The sun is needed for photosynthesis. </li></ul><ul><li>This is the first trophic level. </li></ul>Which organism below would be an autotroph ? Sun Grass Rabbit Hawk Bacteria
  4. 5. Herbivores <ul><li>Primary Consumers eat the plants which </li></ul><ul><li>are the autotrophs. </li></ul><ul><li>This is the next trophic level. </li></ul>Which organism below would be an Herbivore ? Sun Grass Rabbit Hawk Bacteria
  5. 6. Carnivores <ul><li>Secondary Consumers eat the primary consumers. There can also be tertiary consumers that eat the secondary consumers. </li></ul><ul><li>This is the third trophic level. </li></ul>Which organism below would be an Secondary Consumer ? Sun Grass Rabbit Hawk Bacteria
  6. 7. Decomposers <ul><li>Decomposers break down the dead plants and animals. </li></ul><ul><li>This turns them back into soil which the plants need. </li></ul><ul><li>This is the last trophic level. </li></ul>Which organism below would be an Decomposer? Sun Grass Rabbit Hawk Bacteria
  7. 8. Forest Food Chain Sun Grass Grasshopper Toad Snake Hawk Bacteria
  8. 9. Food Webs <ul><li>Most food chains are interconnected . </li></ul><ul><li>Anr-imals typically consume a varied diet and, in turn, serve as food for a variety of other creatures that prey on them. </li></ul><ul><li>These interconnections create food webs. </li></ul>Try creating three interactive food webs by clicking on the link below: FOOD WEB FUN
  9. 10. Works Cited <ul><li>http://users. rcn . com/jkimball .ma. ultranet/BiologyPages/F/FoodChains .html </li></ul><ul><li>http://www.harcourtschool.com/activity/food/food_menu.htm </li></ul><ul><li>http://www. coralreefnetwork .com/educate/shows/foodwebs/slide1. htm l </li></ul>

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