Presentation on theme: "Biogeochemical Cycles"— Presentation transcript:
1 Biogeochemical Cycles Water CycleCarbon CycleNitrogen Cycle
2 General Model of Nutrient Cycling 1. Producers incorporate chemicals from the abiotic reservoir (where a chemical accumulates or is stockpiled outside of living organisms) into organic compounds.2.Consumers feed on the producers, incorporating some of the chemicals into their own bodies.3. Both producers and consumers release some chemicals back to the environment in waste products (CO2 and nitrogen wastes of animals)4. Detritivores play a central role by decomposing dead organisms and returning chemicals in inorganic form to the soil, water, and water.5. The producers gain a renewed supply of raw materials, and the cycle continues.
4 PLEASE REMEMBER, NUTRIENTS ARE RECYCLED IN AN ECOSYSTEM, BUT ENERGY IS LOST FOR LIVING ORGANISMS AT THE END OF THE FOOD CHAIN.
5 Water Cycle 1.Precipitation 2.Condensation (conversion of gaseous water vapor into liquid water)3. Rain Clouds4. and 5. Evaporation (conversion of water to gaseous water vapor) from ocean6. and 7. precipitation over ocean8. evaporation from land9. Transpiration10. Transpiration11. evaporation from lakes, rivers12. surface runof13. infiltration (movement of water into soil)14. Water locked in snow15. Precipitation to land**refer to diagrams in handout
7 Carbon Cycle 1. Carbon in plant and animal tissues 2. fossilization (preserved remains or traces of animals, plants, and other organisms)3. Death and excretion4. Decomposers (breakdown organic materials to inorganic ones)5. coal6. photosynthesis7. atmospheric CO28. Dissolving9. combustion (burning of wood and fossil fuels)10. diatoms (major group of algae, and are one of the most common types of phytoplankton)11. drilling for oil and gas12. fossilization13. oil and gas14. limestone**refer to diagrams in handout