Biochemical cycles includes the water, carbon, nitrogen, phosphorus, and sulfur cycle. Microorganisms acts in regulating biochemical systems.
In Carbon cycle, plants transport carbon from the atmosphere to the biosphere. This is done in the process of photosynthesis. The energy coming from the sun fuse with carbon dioxide and hydrogen together with oxygen coming from water to produce sugar.
Nitrogen cycle is nitrogen fixation that involves bacteria and blue-green algae. Nitrogen gas is being converted to inorganic compounds in this cycle.
Water cycle involves plants that release water to the atmosphere in the process of transpiration.
Phosphorus cycle involves decomposing microorganisms such as fungi and bacteria. This is done to balance the concentration of phosphorus in the ecosystem.
Sulfur cycle involves microorganisms such as proteus and campylobacter. They have the ability to reduce sulfur. This process is called as oxidation-reduction and assimilation-dissimilation steps of sulfur cycle.