Jp Pp


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Jp Pp

  1. 1. Identifying Food Chains<br />Mr. Polanyi<br />Clipart from Microsoft<br />
  2. 2. Definitions<br />Organism – Individual form of live<br />Plants, Animals, Bacterium<br />Herbivores – Animals that eat ONLY PLANTS<br />Carnivores – Animals that eat ONLY ANIMALS<br />Omnivores – Animals/People who eat BOTH ANIMALS & PLANTS <br />
  3. 3. Definitions<br />Decomposers – Feed on decaying matter<br />Consumers – Can’t produce their own food<br />Producers – Can produce their own food<br />Trophic Level – Different levels of food chains<br />
  4. 4. Food Chain<br /><ul><li>Sequence of who eats who in a biological community
  5. 5. Every organism needs energy to live
  6. 6. Arrows show the flow of energy
  7. 7. A network of many food chains is called a food web.</li></li></ul><li>Ecosystem<br />Everything in an environment<br />Plants, Animals, Soil, Sunlight, Water, Nutrients<br />Organisms depend on one another for survival<br />Can be permanent or temporary<br />
  8. 8. Trophic Levels<br />Primary Producers – The base<br />Primary Consumers – Eat primary producers<br />Secondary Consumers – Eat primary consumers<br />Tertiary Consumers – Eat secondary consumers<br />Quaternary Consumers – Eat tertiary consumers<br />
  9. 9. Population<br />Group of organisms that live in a particular area<br />Number of organisms changes over time<br />Limiting Factors – Prevent populations from growing<br />Important to a stable population<br />
  10. 10. Equilibrium<br />Increase carnivores -&gt; Decrease herbivores<br />Harder for carnivores to eat<br />Relatively stable relationship<br />Balanced equilibrium is a successful food chain<br />
  11. 11. Environmental Changes<br />Decrease food and water supplies<br />Light – Common resource needed for plants<br />Space – Organisms need space to grow<br />Weather – Storms affect ecosystems<br />
  12. 12. Environmental Changes<br />Predators – Decrease the population<br />Diseases – Affect the growth rate<br />Parasitism – The host becomes harmed<br />
  13. 13. Environmental Changes<br />Global warming <br />Deforestation – Killing habitats and ecosystems<br />Pollution – Air and water pollution<br />Oil spills, fertilizers <br />Climate Change – Difficult for Plants/Animals to adapt<br />
  14. 14. Number of Organisms<br />Energy is lost when organism eats another<br />Has to be more plants than plant eaters<br />Births & Deaths affect population growth<br />Extinction -&gt; Affects entire chain<br />
  15. 15. Energy Flow<br />Energy is lost at each stage of the food chain<br />Energy is lost to the environment<br />Down river, decaying<br />Average 10% of energy is passed on<br />More smaller animals in the transfer of energy<br />
  16. 16. Grassland Biome<br />
  17. 17. Food Web<br />Quaternary Consumers<br />(eat tertiary consumers)<br />Tertiary Consumers<br />(eat secondary consumers)<br />Heterotrophs<br />Secondary Consumers<br />(eat primary consumers)<br />Primary Consumers<br />(eat producers)<br />Autotrophs<br />Producers<br />(Plants)<br />
  18. 18. Class Activity<br />Create a food chain on a poster board<br />Can be a Grassland Biome, Pond Biome, Ocean Biome, etc<br />Show the different trophic levels<br />Identify the flow of energy<br />Identify the organism <br />Consumer, producer, omnivore, etc<br />
  19. 19. References<br />&quot;Food Chains and Food Webs.&quot; N.p., 2009. Web. 6 Oct. 2009. <br />&quot;Interesting Facts about Food Chains.&quot; N.p., 13 Nov. 2000. Web. 6 Oct. 2009. <br />&quot;Food Chains & Food Webs.&quot; NSTA Network of teacher-webwatchers, 6 Oct. 2009. Web. 6 Oct. 2009.<br />