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10 Cards in this Set
- Front
- Back
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Carbon cycle 5 max |
Microorganisms are sacrobiont/ Secrete enzymes onto dead tissue (extracellular digestion)/ Absorb products of digestion/ Respiration produces co2/ Carbon taken in by leaves/ Through stomatal |
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Co2 at night (atmosphere |
Increases as photosynthesis doesn't occur |
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Co2 during the day ( atmosphere) |
Falls as rate of photosynthesis exceeds the rate of Respiration |
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Air movement of co2 |
Little air movement means co2 can build up but if air movement I'd high co2 tends to be low |
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Co2 in winter |
Cooler temp shorter days and loss of leaves reduce the amount of photosynthesis occurring. Less co2 is absorbed so co2 levels increase. |
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Nitrogen cycle 5 marks |
Sacrobiont decompose/ Proteins, amino acids, and DNA, into ammonia compounds/ Ammonia is converted into nitrite/ And nitrites into nitrates/ Via nitrifying bacteria/ (Nitrites can be converted into N2 gas visit denitryfying bacteria) N2 back to ammonia/ By nitrogen fixing bacteria. |
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Phosphorus cycle 5 marks |
Scarobionts decompose/ Phospholipids, RNA and DNA/ Phosphate ions are also found in guano/ Phosphate ions are transported by streams, oceans, and lakes/ To form sedimentary rock/ Erosion of rocks help Phosphate ions dissolve in oceans/ Phosphate becomes available for absorption by plants for biomass. |
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Types of fertilisers |
Organic waste materials like manure Inorganic manufactured powders containing nitrogen, phosphorous, and potassium. |
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Environmental impacts of fertilisers |
Reduced species diversity plants adapted to high nitrogen soils out compete other species. Environmental issues ecosystems crops are removed and there is less decomposition therefore less nitrate is returned to soil. Fertilisers replace nitrates and phosphorous. |
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Leaching |
Inorganic fertilisers result in excess ions applied to soil. Ions can dissolve in soil water and are washed into streams, lakes and rivers. |
