BRAINCAKEMicroorganisms in the Carbon Cycle
Carbon is constantly recycled between the atmosphere, living organisms, soil and oceans. Microorganisms (bacteria and fungi) are essential to this cycle because they release the carbon locked up in dead organic matter.
Saprobionts (decomposers) feed on dead organisms, faeces and urine. They secrete enzymes onto the material and absorb the soluble products of this extracellular digestion. Some of the absorbed glucose is used in respiration, releasing carbon dioxide into the air or soil water. Without decomposers, carbon would stay trapped in dead bodies and waste, and less CO2 would be available for photosynthesis.
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More in The Efficiency of Ecosystems
- The Limitations of Efficiency Calculations
- Energy Transfer and Food Chain Length
- Nutrient Recycling
- Conditions for Recycling Nutrients
- Microorganisms in the Nitrogen Cycle
- Short-term Carbon Sinks
- Long-term Carbon Sinks
- Human Influence
All 20 lessons in The Efficiency of Ecosystems · All Edexcel A-level Biology topics