Bio 9_ Chapter 3.txt

Card Set Information

Bio 9_ Chapter 3.txt
2011-09-16 01:09:07

Ecosystems: What Are They and How Do They Work?
Show Answers:

    • author "me"
    • tags ""
    • description "Ecosystems: What Are They and How Do They Work?"
    • fileName "Bio 9: Chapter 3"
    • freezingBlueDBID -1.0
    • How much land surface does the rainforest take up?
    • 2%
  1. ____ of the world's known terrestrial plant and animal species live in rainforests.
  2. True or false: 70% of the rainforest has been destroyed or disturbed by humans.
    False. 50% or less has been destroyed.
  3. What are some of the consequences of destroying rainforests?
    Decreased biodiversity, accelerated global warming, and changes in regional weather patterns.
  4. What are the major life-support components?
    Atmosphere, hydrosphere, geosphere, and biosphere
  5. What factors sustain life on earth?
    The one way flow of energy, nutrient cycling through the biosphere, and gravity.
  6. What are the levels of organization?
  7. True/false: If something is abiotic, it is alive.
    False. Abiotic things are non-living.
  8. True/False: A dead cow is abiotic.
    False. Dead organisms and their waste products are biotic.
  9. Define trophic level.
    The step ladder of where you feed on the food chain.
  10. What are autotrophs?
    Producers (photosynthesis)
  11. True/False: Herbivores are an example of primary consumers.
  12. Can detrivores be decomposers?
    Yes, since they release nutrients from the dead bodies they feast upon.
  13. What is aerobic respiration?
    The burning of sugar by using oxygen.
  14. How are ecosystems sustained?
    Through 1-way energy flow from the sun and nutrient cycling.
  15. True/False: Biomass decreases with decreasing trophic level.
    False. It increases.
  16. What is the ecological efficiency?
    Typically 10%.
  17. What does GPP stand for? What is it?
    Gross Primary Productivity. It is the rate of autotrphic biomass production, or synthesis production.
  18. What does NPP stand for? What is it?
    Net primary production. It is the rate at which producers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored energy.
  19. What are the 5 biogeochemical cycles?
    The hydrologic, carbon, nitrogen, phosphorous, and sulfur cycle.
  20. What nutrients are stored in the atmosphere?
    Carbon, nitrogen, and sulfur.
  21. What nutrients are stored in geologic reservoirs?
    All of them.
  22. What nutrients are stored in biotic life?
    Carbon, nitrogen, phosphorous, and sulfur.
  23. True or False: We can destroy these nutrients.
    False. They can neither be created nor destroyed. They just cycle through.
  24. [CO2]=
    O.038% of the atmosphere or 380 parts per atmosphere