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MATTER CYCLING IN ECOSYSTEMS

MATTER CYCLING IN ECOSYSTEMS. Nutrient Cycles: Global Recycling Global Cycles recycle nutrients through the earth’s air, land, water, and living organisms. Nutrients are the elements and compounds that organisms need to live, grow, and reproduce.

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MATTER CYCLING IN ECOSYSTEMS

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  1. MATTER CYCLING IN ECOSYSTEMS • Nutrient Cycles: Global Recycling • Global Cycles recycle nutrients through the earth’s air, land, water, and living organisms. • Nutrients are the elements and compounds that organisms need to live, grow, and reproduce. • Biogeochemical cycles move these substances through air, water, soil, rock and living organisms.

  2. Plants & The Carbon Cycle • Plants take in carbon dioxide and convert it to sugar which can be stored until used for energy. • This process is calledphotosynthesis.

  3. Photosynthesis: CO2 + H2O + sunlight yields O2 + C6H12O6

  4. Plants & The Carbon Cycle • Plants release carbon dioxide as a waste product when they convert their stored sugar to chemical energy. • This process is calledrespiration.

  5. Respiration: C6H12O6 + O2 yields CO2 + H2O + energy

  6. Animals & The Carbon Cycle • Animals eat carbon contained in animal and plant tissues and release carbon dioxide as a waste product. • This process is respiration.

  7. Decay & The Carbon Cycle: • Decomposers release the carbon from dead plant and animal tissues back into the atmosphere.

  8. Fossil Fuels & The Carbon Cycle: • Over millions of years fossil fuels may form from the buried remains of plants and animals.

  9. Fossil Fuels & The Carbon Cycle: • This carbon reenters the atmosphere duringcombustion. Man shortened the cycle.

  10. The Oceans & The Carbon Cycle: • Dissolved carbon dioxide in sea water becomes deposited as calcium carbonate shells and bone.

  11. The Oceans & The Carbon Cycle: • Over millions of years, these shells and bone form sedimentary rock, like limestone and dolomite and some sandstone.

  12. Reservoirs or Sinks of Carbon • Ocean deposits are the biggest sink of carbon on the planet. • The Rock Cycle ultimately releases carbon stored in sedimentary rock. If man harvests the rock, then the cycle speed is increased.

  13. NOT THE ONLY ONE! • Man is not the only object on the Earth to put carbon in the atmosphere. • Volcanic activity also releases carbon stored in rock. However, the amount is much less than man. • http://hvo.wr.usgs.gov/volcanowatch/2007/07_02_15.html

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