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Ecosystem Unit


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Ecosystem Unit focusing on biotic/abiotic factors, consumer levels, energy flow in foodchains, foodwebs, and energy pyramids.

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Ecosystem Unit

  1. 1. Ecosystem Unit<br />Energy Flow in Ecosystems<br />
  2. 2. What if???<br />All the plants and animals disappeared?<br />
  3. 3. Lets Think About This…<br />Are all parts of a forest where organisms live the same? <br />If so, explain why you think that. If no, explain why you think that.<br />What are some habitats (see p. 7 if you need to learn what a habitat is) in a forest?<br />Why do you find different kinds of organisms in different habitats?<br />
  4. 4. Ecology<br />Study of interactions of living things with one another and their environment<br />
  5. 5. Habitat<br />An environment that provides the resources, such as food, water, and shelter that an organisms needs to live, grow, and reproduce<br />
  6. 6. Biotic vs. Abiotic Factors<br />Living<br />Examples<br />Plants<br />Animals <br />Fungi <br />Bacteria<br />Non-Living<br />Examples<br />Water<br />Sunlight<br />Soil<br />Air <br />Temperature<br />
  7. 7. Biotic vs. Abiotic Factors<br />Identify the biotic vs. abiotic factors in this image below.<br />
  8. 8. Levels of Organization<br />Organism<br />Population<br />Community<br />Ecosystem<br />Ecosystem<br />Community<br />Population<br />Organism<br />
  9. 9. Organism<br />Living Thing<br />I’m ALIVE!!!<br />
  10. 10. Population<br />All members of one species living in the same area<br />Species-similar individuals that can mate to produce fertile offspring<br />Example… humans in Corunna<br />We’re alike… One big happy population!<br />
  11. 11. Community<br />All the different populations that live and interact together in an area<br />Example: Corunna Community consists of people, cats, dogs, birds, worms, insects, frogs, trees, flowers, grass, etc<br />These are the organisms we see each day…<br />
  12. 12. Ecosystem<br />The community of organisms that live in a particular area along with their non-living surroundings<br />All the abiotic and biotic factors<br />Examples: Corunna Ecosystem– includes all community members plus pond, lake, fields, air we breath, etc.<br />
  13. 13. Energy Roles in Ecosystem<br />Producers<br />Consumers<br />Decomposers<br />Do you KNOW your role?<br />
  14. 14. Producers<br />Make their own food<br />Use energy from the sunlight to turn raw materials into food by the process of photosynthesis<br />Source of all food within an ecosystem<br />Examples: plants, algae, blue-green bacteria<br />
  15. 15. Consumers<br />Cannot make their own food<br />Feed directly or indirectly on producers for food and energy<br />How does these organisms differ?<br />
  16. 16. Types of Consumers<br />Herbivores<br />Only eat plants<br />Omnivores<br />Eats both plants & animals<br />Carnivores<br />Only eats animals<br />Scavengers<br />Eat bodies of dead organisms<br />I want to suck your blood!!!<br />Yummy Salads!!!<br />I’ll have a trout with a side of berries<br />Serve up the ROAD KILL!!!<br />
  17. 17. Decomposers<br />Breaks down waste and dead organisms into simpler substances (decay)<br />Essential to Ecosystem<br />Rid environment of dead bodies<br />Return raw materials to ecosystem for producers to use (recycle)<br />Examples: Mushrooms (fungi) & Bacteria<br />
  18. 18. Energy Transfers in Ecosystems<br />Movement of energy through an ecosystem can be shown in diagrams<br />Food Chains<br />Food Webs<br />
  19. 19. Food Chains<br />Series of event in which one organism eats another to obtain energy<br />Shows only one possible path of energy<br />Arrow points in direction that energy flows<br />Decomposers usually left off, but mark the end of the chain<br />What will happen to the other organisms in the food chain if the grass dies?<br />
  20. 20. Food Web<br />Most organisms eat more than one kind of food, there must be more than one food chain in an ecosystem<br />Consists of many overlapping food chains<br />If an organisms is removed, other organisms probably will not die because there are other food resources<br />Global Food Web- all the world’s food webs interconnected<br />
  21. 21. Food Web<br />
  22. 22. Consumers Levels<br />Location of a consumer along a food chain<br />1st Level- feeds on the producer<br />2nd Level-feeds on 1st level<br />3rd level feeds on 2nd level<br />Organisms use energy it obtains to grow, move, reproduce, and carry out activities<br />Rest of energy is lost to environment <br />Each successive (higher) level will have less energy available<br />Fewer organisms at highest level, Since much energy is lost<br />
  23. 23. Food Web & Consumer Levels<br />2nd Level Consumer<br />3rd Level Consumer<br />1st Level Consumer<br />2nd Level Consumer<br />Producer<br />
  24. 24. Energy Pyramid<br />Shows the amount of energy that moves from one feeding level to another in a food web<br />3rd Level Consumers (1 kcal)<br />Energy decreases as you move up the pyramid…<br />Therefore, <br />fewer organisms<br />2nd Level Consumers (10 kcal)<br />1st Level Consumers (100 kcal)<br />Producers (1,000 kcal)<br />
  25. 25. Energy…What happens to it?<br />Stored in chemical bonds that make up molecules of all living things<br />At each link in food chain, molecules are broken down (digested) and recombined into new molecules<br />Some energy used by organism for basic life functions<br />Much of energy dissipates into environment as heat<br />Flows from sun to producers to consumers to decomposers<br />
  26. 26. References<br />Cronnin Jones Ph. D, L., & Lisowski, P. M. (2009). Prentice Hall Science Explorer: Environmental Science. Upper Saddle River: Pearson Education, Inc.<br />