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Ecosystems - Elementary

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Ecosystems - Elementary

  1. 1. EcosystemsEcosystems
  2. 2. What is Ecology?What is Ecology?• Ecology is the study ofrelationships between livingthings and between livingthings and their environment.
  3. 3. What is an ecosystem?What is an ecosystem?• Ecosystem is a system of livingthings that interact with eachother and with the physical world.• A Biome is a collection of relatedecosystems.
  4. 4. Ecosystems Living ThingsEcosystems Living Things• Ecosystems-include all different kinds ofliving things that live in a physicalenvironment and interact with each other.• a. Producers-plants• b. Consumers-animals• c. decomposers- bacteria• They form an interdependent communityneeded to sustain life.•
  5. 5. Main Ecosystems:Main Ecosystems:• Desert• Rainforest• Ocean• Taiga• Tundra• Chaparral• Grassland• TemperateForest
  6. 6. Green:Grassland Purple: Taiga Orange:TundraBlack:Temperate Forest Yellow:DesertBrown:Chapparal White:Ocean
  7. 7. However……..However……..• An ecosystem can be as large as theSahara Desert, or as small as apuddle!!!• Ecosystems are more than just theorganisms they contain.Geography,weather,climate andgeologic factors also influence theinteractions within an ecosystem.
  8. 8. Abiotic FactorsAbiotic FactorsAre nonliving physicalAre nonliving physicalfactors of an environment.factors of an environment. Abiotoic Factors include amount of waterAbiotoic Factors include amount of waterand oxygen, temperature, amount ofand oxygen, temperature, amount ofsunlight and water pressure.sunlight and water pressure.
  9. 9. YOU TRY!!!YOU TRY!!!List three moreList three moreexamples of Abioticexamples of AbioticFactors:Factors:
  10. 10. Biotic FactorsBiotic Factors• Are the living, physicalfactors of an environment.• Examples of Biotic Factors are plants,animals, etc.
  11. 11. BalanceBalance Ecosystems will fail if they do notEcosystems will fail if they do notremain in balance.remain in balance. No community can carry moreNo community can carry moreorganisms than its food, water andorganisms than its food, water andshelter can accommodate.shelter can accommodate. Do ecosystems change over time?
  12. 12. How do they stay balanced? To succeed in an ecosystem, plantsand animals have special structuresand behaviors called adaptations. Ex) ChameleonPolar BearCan you think of more examples ofadaptation?
  13. 13. Forest Ecosystems Forest fires and effect onecosystems should be ornot be allowed to burn? Wildfire is a part of nature.It plays a key role inshaping ecosystems byserving as an agent ofrenewal and change.
  14. 14. Web Energy 1st- trophic level- photosynthetic plants 2nd- trophic level- herbivores 3rd- trophic level- carnivores Decomposers obtain energy-all levels
  15. 15. What is the different between afood web and food chain? a food chain is a linearseries of organismsdependent on eachother for food, a foodweb is aninterconnected set offood chains in the sameecosystem.
  16. 16. Prey and Predators A predator is an organism that eats another organism. The prey isthe organism which the predator eats. Some examples of predatorand prey are lion and zebra, bear and fish, and fox and rabbit.Do organisms higher in the food web eateverything that is lower in the food web?Logic and mathematical theory suggest that when prey arenumerous their predators increase in numbers, reducingthe prey population, which in turn causes predatornumber to decline. The prey population eventuallyrecovers, starting a new cycle.
  17. 17. This powerpoint was kindly donated towww.worldofteaching.comhttp://www.worldofteaching.com is home to over athousand powerpoints submitted by teachers. This is acompletely free site and requires no registration. Pleasevisit and I hope it will help in your teaching.
  18. 18. This powerpoint was kindly donated towww.worldofteaching.comhttp://www.worldofteaching.com is home to over athousand powerpoints submitted by teachers. This is acompletely free site and requires no registration. Pleasevisit and I hope it will help in your teaching.

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