Ecosystem Ecology- Test 3

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Author:
Anonymous
ID:
247392
Filename:
Ecosystem Ecology- Test 3
Updated:
2013-11-17 19:00:24
Tags:
bio
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bio
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  1. ecosystem
    organisms or communities and their non-living environment
  2. ecosystem ecology
    the field that examines cycling of nutrients and transfer of energy
  3. the earth is a _____ system with respect to chemicals and an _____ system with respect to energy
    • closed
    • open
  4. biogeochemical cycles
    • the cycling of all substances that occur in organisms through ecosystems
    • 1. water cycle
    • 2. carbon cycle
    • 3. nitrogen cycle
  5. global water cycle
    • water is the source of hydrogen ions used for the formation of ATP
    • water covers 3/4 of the earth's surface
    • only 2% of all water is in captured form
    • groundwater
    • breaking the water cycle
  6. global carbon cycle
    • .03% of the atmosphere is CO2
    • 10% if fixed every year (700 billion metric tons)
  7. aerobic conditions
    • fixation
    • nitrification
    • immobilization and plant uptake
    • ammonification
  8. anaerobic conditions
    denitrification
  9. autotrophs
    • organisms that produce their own energy
    • primary producers
    • ex. plants, algae, some bacteria
  10. heterotrophs
    • must obtain food from other organisms
    • consumers
    • ex. animals, fungi, most protists and bacteria

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