Decomposer - GCSE Geography Definition

In the context of GCSE Geography, a decomposer is an organism, such as bacteria and fungi. They break down dead organic material and waste products into simpler substances. Decomposers play a critical role in ecosystems by recycling nutrients back into the soil, which can then be used by plants for growth. This process helps sustain the nutrient cycle and maintain soil health, ensuring that ecosystems remain balanced and productive. By converting dead matter into forms that can be reabsorbed, decomposers support the flow of energy through the food web and contribute to the stability of ecosystems.