GCSE Combined Science (AQA)

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Decomposition & Decomposers

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Ecology Organisation of an Ecosystem

Decomposition & Decomposers

1:50 Cycling of Materials
Spec 4.7.2.2
Previous The Water Cycle Next Biodiversity
  • Decomposition, also known as decay, is the breakdown of organisms after their death, affecting all organisms including plants and animals.
  • Decomposers, primarily microorganisms like bacteria and fungi, as well as worms and maggots, carry out the process of decomposition.
  • For academic purposes, it's sufficient to refer to microorganisms as decomposers without naming specific ones, focusing instead on understanding their role.
  • Decomposers break down dead plant and animal matter by secreting enzymes into the environment, which helps in recycling materials within an ecosystem.
  • Decomposition allows for the cycling of materials, enabling them to re-enter the ground or air for use by other organisms.
  • Through decomposition, carbon is returned to the atmosphere as carbon dioxide and mineral ions are returned to the soil, contributing to the carbon cycle.

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