Nutrient cycles for blog

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Nutrient cycles for blog

  1. 1. CYCLING OF MATTER
  2. 2. • ENERGY FLOWS THROUGH ECOSYSTEM• WATER—NITROGEN—CARBON—PHOSPHORUS ARE RECYCLED!!!• THEY MOVE THRU A BIOGEOCHEMICAL CYCLE:• ABIOTIC (non-living) PORTION OF ENVIRONMENT (ATMOSPHERE) Biotic THEN BACK AGAIN
  3. 3. The Water Cycle
  4. 4. Water Cycle CELLS CONTAIN 70-90% H20 • VERY LITTLE OF EARTHS AVAILABLE H20 IS IN LIVING THINGS • RIVERS / LAKES / STREAMS / OCEANS CONTAIN A BIG % • ATMOSPHERE CONTAIN WATER = WATER VAPOR • GROUND WATER = IN SOIL OR UNDERGROUND IN POROUS ROCK • WATER CYCLE = MOVEMENT OF H20 B/T RESERVOIRS – EVAPORATION – TRANSPIRATION – PRECIPITATION
  5. 5. Evaporation• Liquid  gas (water vapor)• HEAT (sun) CAUSES WATER TO EVAPORATE• 90% OF EVAPORATED WATER FROM TERRESTRIAL ECOSYSTEM PASSES THROUGH PLANTS IN A PROCESS CALLED…
  6. 6. Transpiration• PLANTS TAKE IN H20 THRU ROOTS• RELEASE WATER & TAKE IN CO2 (CARBON DIOXIDE)
  7. 7. Condensation• Water vapor cools in the atmosphere and condenses (gasliquid) around dust particles to form clouds.• The water droplets stick to each other and become too heavy, so they must fall out of the sky and back to earth…
  8. 8. Precipitation• WATER LEAVES ATMOSPHERE• TEMP & AIR PRESSURE DETERMINE HOW MUCH WATER CAN BE HELD• Then it will: – SNOW, RAIN, SLEET, HAIL OR FOG
  9. 9. Carbon Cycle• PHOTOSYNTHESIS + CELLULAR RESPIRATION• PHOTOSYNTHESIS = PLANTS & OTHER AUTOTROPHS USE: CO2 + H20 & SUNLIGHT = CARBOHYDRATES
  10. 10. HUMAN INFLUENCE ON THE CARBON CYCLE • IN THE PAST 150 YEARS CO2 IN THE ATMOSPHERE HAS RISEN 30% ALMOST ½ IN THE LAST 40 YEARS • HUMAN ACTIVITY IS THE CAUSE • BURNING FOSSIL FUEL: – REMAINS OF ORGANISMS THAT HAVE BEEN TRANSFORMED BY DECAY, HEAT, & PRESSURE  ENERGY RICH ORGANIC MOLECULES
  11. 11. • BURNING RELEASES ENERGY & CO2• BURNING VEGETATION RELEASES CO2• TROPICAL RAINFOREST DESTRUCTION• WITH NO PLANTS CO2 IS NOT ABSORBED
  12. 12. Nitrogen Cycle• NITROGEN IS NEEDED TO MAKE PROTEINS & NUCLEIC ACIDS (DNA OR RNA)• N2 (NITROGEN GAS) MAKES UP 78% OF THE ATMOSPHERE (unusable in this form)• N2 must be changed to AMMONIA to be used by living things.
  13. 13. NITROGEN FIXATION• CONVERSION OF N2 TO AMMONIA• CERTAIN BACTERIA CAN CONVERT N2 NH3 NITROGEN- FIXING BACTERIA• LIVE IN SOIL & IN SOME ROOTS
  14. 14. Recycling Nitrogen• BODIES OF DEAD ORGANISMS CONTAIN “N” – URINE & DUNG ALSO• DECOMPOSERS BREAK DOWN CORPSES & WASTE OF ORGANISMS GIVE OFF NITROGEN AS AMMONIA = AMMONIFICATION• NITRIFICATION = BACTERIA IN SOIL TAKE IN AMMONIA & OXIDIZE IT INTO NITRITES, NO2 & NITRATES, NO3
  15. 15. • PLANTS CAN ABSORB NITRATES & AMMONIA FROM SOIL – ANIMALS CANNOT!• ANIMALS OBTAIN IT BY EATING OTHER ORGANISMS & DIGESTING THE PROTEINS & NUCLEIC ACIDS• DENITRIFICATION• RETURNING NITROGEN TO ATMOSPHERE
  16. 16. PHOSPHORUS CYCLE
  17. 17. Short Term Phosphorus is cycled from the soil to producers and then from the producers to consumers.Long Term Weathering or erosion of rocks that contain phosphorus slowly adds phosphorus to the cycle.

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