Ecosystems 1

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Author:
bijaldesai
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174239
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Ecosystems 1
Updated:
2012-10-04 05:53:49
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Chapter 1
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  1. Ecosystem
    All the interacting parts of a biological community and its environment
  2. Sustanible ecosystem
    an ecosystem that is capable of withstanding pressure and giving support to a variety of organisms
  3. Biotic
    • the living parts of an ecosystem
    • e.g. plants, animals,fungi
  4. Abiotic
    • the non-living parts of an ecosystem
    • e.g. water,light,air,sunlight
  5. Lithosphere
    the hard part of earths surface
  6. Hydrosphere
    all the water found on Earth, including lakes,oceans,and ground water
  7. Atmosphere
    The layer of gases above Earth's surface
  8. Biosphere
    The regions of Earth where living organisims exist
  9. Nutrients
    Chemicals that are essential to living things and is cycled through ecosystems
  10. Eutrophication
    a process in which nutrient levels in aquatic ecosystems increase, leading to an increase in the populations of primary producers 
  11. Photosynthesis
    a process that changes solar energy into chemical energy
  12. Trophic level
    A category of organisms that is defined by how the organisms gain their energy
  13. Trophic efficiency
    a measure of the amount of energy or biomass transferred from one trophic level to the next higher trophic level.
  14. Biomass
    the total mass of living organisms in a defined group or area
  15. Bioaccumulation
    a process in which an organism ingests materials, especially toxins,faster than it eliminates them
  16. Biomagnification
    a process in which the concentration of ingested toxins increases as it moves from one trophic level to the next
  17. Cellular respiration
    a process that releases energy from organic molecules, especially carbohydrates, in the presence of oxygen
  18. Fermentation
    a process that releases energy from organic molecules, especially carbohydrates in the absence of oxygen
  19. Greenhouse gas
    an atmospheric gas that prevents heat from leaving the atmosphere, thus increasing the temperature of the atmosphere
  20. Greenhouse effect
    the warming of Earth as a result of greenhouse gases, which trap some of the energy that would otherwise leave Earth. 
  21. Acid precipitation
    rain,snow,or fog that is unaturally acidic (pH less than 5.6) due to gases in the atmosphere that react with water to form acids

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