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Ecological Organization


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This powerpoint describes the levels of which ecologists study organisms interacting with their environments. Also includes a review of heterotrophs, autotrophs, and ecological pyramids.

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Ecological Organization

  1. 1. Catalyst:  Write down your answer in the Monday Catalyst box.  Write your definition of ecology and what is entails as a science.
  2. 2. Ecology I will be able to identify the different levels of organization in Ecology and identify what shapes an ecosystem.
  3. 3. Interactions and Interdependence  Ecology is the study of the interactions of organisms with their physical environment and with each other.  The study of ecology ranges from the study of an individual organism to populations, communities, ecosystems, biomes, and to the entire biosphere.
  4. 4. Levels of Organization-from smallest to largest  Organism: an individual.  Organisms belong to a species. Species are groups of organisms so similar to one another that they can breed and produce fertile offspring.  Population: groups of individuals that belong to the same species and live in the same area (throwback to last unit!)  Ex: pod of whales, pride of lions
  5. 5. Levels of Organization-from smallest to largest  Community: consists of all the organisms living in one area.  Ex: Pride of lions, hyenas, antelope, grass, etc. What do all of these things have in common?  Ecosystem: includes all of the organisms in a given area as well as the abiotic factors (nonliving) with which they interact.  Ex: pride of lions, rocks, water, grass, antelope, soil, sunlight, wind, etc.
  6. 6. Levels of Organization-from smallest to largest  Biomes: a particular physical environment that contains a characteristic assemblage of plants and animals.  Ex: tropical rain forest, tundra, desert, etc.  Biosphere: contains the combined portions of the planet in which all of life exists. Includes the land, water, and atmosphere.
  7. 7. Let’s put it into practice!
  8. 8. You try!
  9. 9. Brain Break!  pxo  5uxg&index=3&list=PL3wgUsES99dWz2Mz2 4YgczQPfYotqJ4hk
  10. 10. Memory Monday  At the very core of EVERY organisms interaction with its environment, is its need for energy.  Where does it come from?  Autotrophs!  What are they?  Organisms that capture sunlight and use that energy to produce chemical compounds for food.
  11. 11. Memory Monday! Continued…  Who gets the energy next?  Heterotrophs!  They rely on other organisms for their energy (Consumers)  3 kinds!  Herbivores, Omnivores, and Carnivores.
  12. 12. Memory Monday continued!  Energy flows one way in a ecosystem. From the sun, to autotrophs, to heterotrophs.  Food chains: very simple chain of organisms showing the flow of energy.  Food Webs: More complex, consist of several food chains, even include decomposers-detritivores  Ecological Pyramids: 3 kinds!  Energy pyramids: Shows the relative amount of energy available at each trophic level.  Biomass pyramid: represents the amount of living organic matter at each trophic level.  Pyramid of numbers: shows the relative number of individual organisms at each trophic level.