2. Regents Biology Chapter 2– Communities & Ecosystems Biogeochemical Cycles

3. Regents Biology But what about nutrients?  Energy flows through BUT nutrients cycle  nutrients must be recycled to be available for the next generation  decomposers return nutrients to the soil after creatures die  fungi  bacteria nutrientsnutrients decomposers

4. Regents Biology Nutrients cycle around… through decomposers soil producers consumers decomposers potassium nitrogen iron calcium phosphorus magnesium carbon

5. Regents Biology Carbon Cycle – You need to label your sheet here !  Carbon is used to make organic molecules  Plants & autotrophs:  Intake: Absorb CO 2 from atmosphere  Output: Create carbohydrates by photosynthesis CO 2 sugars CO 2 sugars CO 2

6. Regents Biology Carbon Cycle  Decomposers  Input: Feed on dead organic matter  Output: Organic molecules returned to soil during decomposition C C C sugars

7. Regents Biology Carbon Cycle  Human Industry  Output: Release CO 2 into atmosphere when fossil fuels (coal, oil, natural gas) are burned CO 2

8. Regents Biology Nitrogen Cycle – Label your sheet here! NN = 78% atmosphere (most unusable) SS oil Bacteria NNitrogen fixation: convert atmospheric nitrogen into ammonia NNitrification: ammonia converted into nitrates N2N2 Ammonia Nitrates

9. Regents Biology Nitrogen Cycle  Plants  Absorb nitrates through their roots Nitrates

10. Regents Biology Nitrogen Cycle AA nimals IIngest nitrates through the food chain (plants eaten) Nitrates

11. Regents Biology Nitrogen Cycle  Decomposers  Feed on dead organisms  Return ammonia to soil by feeding on dead matter Ammonia Nitrates

12. Regents Biology geologic uplifting rain weathering of phosphate from rocks runoff sedimentation forms new rocks leaching phosphate in solution animals plants decomposers phosphate in soil The phosphorus cycle

13. Regents Biology 2006-2007 loss of energy sun secondary consumers (carnivores) primary consumers (herbivores) loss of energy producers (plants) decomposers Nutrients cycleEnergy flows soil

14. Regents Biology Hey…hey…hey Have you seen my ball? Any Questions???