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Understanding the Nitrogen, Carbon, Phosphorus, and Water Cycles in Ecosystems

Explore the intricate connections of nitrogen, carbon, phosphorus, and water cycles that sustain life on Earth. This overview explains how nitrogen gas (N2) is fixed by bacteria into ammonium and nitrates, how these are assimilated by plants, and the role of denitrifying bacteria. Discover how plants absorb CO2 through photosynthesis, how animals participate in these cycles, and the importance of decomposers. Learn about the cycles’ impacts through evaporation, condensation, and precipitation, and how these processes maintain ecosystem balance.

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Understanding the Nitrogen, Carbon, Phosphorus, and Water Cycles in Ecosystems

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  1. Nitrogen Cycle (1) Nitrogen gas (N2) in atmosphere (1) (3b)Plants & Animals (3b) (4) DenitrifyingBacteria (4) (3a)Nitrates “assimilated” into plant roots (3a) (2) (2) Nitrogen “fixed” by bacteria into Ammonium & Nitrates Nitrates (NO3-) (3c)Decomposers (bacteria & fungus) (3c) Ammonium (NH4+) Nitrites (NO2-)

  2. Carbon Cycle (1) CO2 in atmosphere (1) (3b) Cellular Respiration (3b) (2) CO2 “fixed by plants through photosynthesis (2) (3d) Burning) (3d) (3a) (3) Animals eat plants (3c) Plants/Animals decompose (detritus) (3c)

  3. Phosphorous Cycle (2a) (2a) Phosphates in plants/animals (2b) Phosphates in rock (2b) (1) Phosphates in soil (1) Phosphates in soil

  4. Water Cycle (3) Condensation (Gas  Liquid/solid) (3) (2) Evaporation (Liquid  Gas) (2) (4) Precipitation (Liquid/solid) (4) (1) Surface Water (liquid) (1) (4a) Recharge/runoff (Liquid) (4a)

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