Food chain
The diagram illustrates the important role that microbes i.e. algae, cyanobacteria and the decomposers, play as primary producers and in the cycling of nutrients.
Step 1: Photosynthesis
Step 2: Primary producers
Step 3: Aerobic respiration
Step 4: Decomposition
Green algae and cyanobacteria are found at the beginning of the food chain. They are known as primary producers because they make their own food.
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Carbon cycle
Where has that carbon atom been? The carbon cycle is a complex cyclical process through which all of the carbon atoms in existence rotate.
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Nitrogen cycle
Similar to the carbon cycle the nitrogen cycle is the process by which nitrogen in all its forms, cycles to the environment.