CH 54

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Author:
anime1003
ID:
85087
Filename:
CH 54
Updated:
2011-05-10 17:12:45
Tags:
Biology exam
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Description:
Exam IV
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  1. Path of energy
    • external energy source (sun)
    • Primary producer (plants)
    • Consumers
    • decomposers
    • Abiotic environment
  2. 3 compnents of abiotic environment
    • soil
    • atmosphere
    • water
  3. ecosystem with high NPP
    • tropical rain forest
    • wetland
    • coral
  4. Ecosytem with low NPP
    • rock
    • desert
    • open ocean
  5. NPP
    Net Primary Production
  6. Limit to NPP
    • Photosynthesis
    • water
    • temperature
    • light
    • nutrients
  7. tropic structure
  8. Food web
  9. Whay are big animals rare
    need more space and resources
  10. generic nutrient cycle
    • resiviors and rates of transfer
  11. decomposers: function
    • control cycling rates
    • liberate nutrients
  12. percolation
    how water moves through soil
  13. Primary N transforming organisms
    bacteria
  14. Equationf for N fixation
    N2=NO3-, NH4+
  15. global carbon cycles
    • ocean absorbs most Carbon
    • we produce more carbon than can be absorbed
  16. How fossil fuels were made
    • 300 million years ago, coboniferous swamp cosumed massice amounts of CO2
    • No decomposers
  17. Effects of extra carbon
    • ice age cycle
    • temperature and CO2 are positivley correlated
    • recent CO2 is banormaly high
  18. Green house gas: effect
    • absorbs energy and emits it back to earth
    • needed for an atmosphere (keep earth warm)
  19. Habitat fragmentaion
    animals cannot travel easily between habitats
  20. Surface layer of water : characteristics
    • much warmer
    • less dense
  21. Benthic water
    • 40 C
    • highest density

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