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Natural (Nutrient) Cycles

Natural (Nutrient) Cycles. C, N, and P -macronutrients (we need a relatively large amount). Carbon Cycle - 5 processes. Respiration -vs- Photosynthesis Decomposition Waste Removal Combustion Metabolism in Organisms Carbohydrates - plants, some animal

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Natural (Nutrient) Cycles

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  1. Natural (Nutrient) Cycles C, N, and P -macronutrients (we need a relatively large amount)

  2. Carbon Cycle- 5 processes • Respiration -vs- Photosynthesis • Decomposition • Waste Removal • Combustion • Metabolism in Organisms • Carbohydrates - plants, some animal • Proteins - animals, some plants (peanuts) • Lipids - animals, some plants (oils) • Nucleic Acids - all cells (DNA, ATP)

  3. Photosynthesis Carbon “moves” from the atmosphere as carbon dioxide (CO2) to Plants as sugar (C6H12O6).

  4. Photosynthesis

  5. Respiration • What happens in respiration? • Oxygen - is “gotten” (breathing, for • example) • Sugar - is obtained(made - plants, eaten - • animals) • Blood - carries O2 & sugar to all • cells • Cells - absorb O2 & sugar by • diffusion • Mitochondria - Makes Energy • CO2 - is exhaled/released as waste

  6. Decomposition- break down of dead organic matter

  7. Decomposition

  8. Metabolism- all the chemical reactions in an organism

  9. Combustion - burning of organic material.

  10. Carbon Cycle Overview

  11. Nitrogen Cycle Importance? • Animal and Plants need it (Protein/Nucleic Acid) • Plants (and animals) can’t use N gas! Processes - that put N into a usable form. Takes place in the Atmosphere & Lithosphere. • In Air: Lightning strikes convert N into a usable form • Nitrogen Fixation (by bacteria in soil) • In soil: Some Bacteria in symbiosis with Legumes • In soil: Some bue-green Algae in soil

  12. Air Nitrogen Cycle Overview Protein Soil

  13. Nitrogen Cycle Overview

  14. Phosphorus Cycle Importance? • Plants growth (especially of leaves) • >Eutrophication - over growth of algae • All cells need it for: • DNA - genetics • ATP - Cellular Energy Processes - Take place primarily in the hydrosphere & lithosphere. • Demineralization: phosphorous in rocks is dissolved by ground water • Animal/Plant Excretion and Decomposition

  15. Phosphorus Cycle Overview C B A D Eutrophication

  16. Water Cycle Overview

  17. Water Cycle • Condensation • Precipitation • Evaporation • Respiration • Evapotranspiration • Infiltration • Run-off

  18. Imbalance in nature

  19. Food Web / Cycles

  20. Summary • C - needed for “backbone” of all organic chemicals. • N - proteins, nucleic acids • P - nucleic acid / plant growth • Water - 75% of organisms / Earth • All (nutrients) are recycled according to The Law of Conservation of Matter.

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