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Ecology

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Review for 7th Grade Ecology unit

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Ecology

  1. 1. ECOLOGYUnit Review
  2. 2. ECOLOGY The science of the relationships between organisms and their environments.
  3. 3. ENVIRONMENT
  4. 4. BIOMES
  5. 5. ECOSYSTEM
  6. 6. BIOLOGICAL SYSTEM/ GEOLOGICAL SYSTEM
  7. 7. BIOTIC/ABIOTIC Biotic – means all the LIVING things in an ecosytem. Abiotic –means all the NON-LIVING things in an ecosystem. The prefix A- in front of a word turns its meaning into the opposite.
  8. 8. BIOLOGICAL CLASSIFICATION This is how scientists classify organisms
  9. 9. BIOLOGICAL CLASSIFICATION An example of biological classification
  10. 10. VERTEBRATE An organism with a backbone
  11. 11. INVERTEBRATE An organism without a backbone
  12. 12. AUTOTROPHS (AKA PRODUCERS) Autotrophs, also known as Producers, can make their own food from sunlight. Producers are plants, algae, and some kinds of bacteria
  13. 13. IN ECOLOGY “MAKING YOUR OWN FOOD” Means THIS …. NOT this …
  14. 14. CONSUMER
  15. 15. SCAVENGERS ARE CONSUMERS
  16. 16. DECOMPOSERS
  17. 17. ENDOTHERMIC/ EXOTHERMIC Endothermic reactions take in energy from the surroundings Exothermic reactions transfer energy to the surroundings
  18. 18. DIVERSITY AKA BIODIVERSITY
  19. 19. PREDATOR/PREY
  20. 20. SYMBIOSIS From the Greek word meaning “living together” and can be used to describe any association between two organisms living in close association with each other.
  21. 21. COMMENSALISM Individuals of one species benefit, while individuals of the other species do not benefit and are not harmed
  22. 22. MUTUALISM an association in which both organisms benefit
  23. 23. PARASITISM one organism [the parasite] benefits, and the other [the host] is adversely affected [weakened, sickened, damaged etc].
  24. 24. FOOD CHAIN/FOOD WEBRemember the arrows show the direction of the transfer ofenergy
  25. 25. RESOURCES Food … Water …. Air … Shelter
  26. 26. HABITAT the place or environment where a plant or animal naturally or normally lives and grows.
  27. 27. NICHE the status of an organism within its environment and community (affecting its survival as a species). No two species can occupy the same niche at the same time for an extended period
  28. 28. LIMITING FACTORS Not enough  Food (prey)  Water  Shelter Too many Predators
  29. 29. CARRYING CAPACITY
  30. 30. ENVIRONMENTAL BENEFIT/RISK Equilibrium = balance. Human interference often knocks ecosystems in the environment out of balance. We must balance the benefits and risks of any action we take … otherwise known as trade-offs
  31. 31. WAYS IN WHICH HUMANS CAUSE IMBALANCE Introduced species Using non-renewable fuel sources (fossil fuels) Damaging/destroying habitat Polluting the environment with trash, chemicals, and gas emissions Overhunting Overgrazing
  32. 32. INTRODUCED SPECIES Synonyms: non-indigenous, exotic, non- native, invasive Starling HydrillaBuffelgrass Zebra mussels Purple loosestrife
  33. 33. FOSSIL FUELS • Oil (gasoline) • Coal • Natural Gas• Fossil fuels come from ancient deposits of fossilizedplants• NON-renewable, when they are gone … they goneforever
  34. 34. HABITAT DESTRUCTION
  35. 35. HABITATRESTORATIONIf we use ourscientificknowledge …we can fixsome of thedamage wehave done …
  36. 36. POLLUTION
  37. 37. GREENHOUSE GAS Any gas that increases the ability of our atmosphere to retain the heat of the sun
  38. 38. GREENHOUSE EFFECT
  39. 39. OVERHUNTING & OVERGRAZING
  40. 40. THIS IS WHY ECOLOGY IS IMPORTANT …

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