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The path of substances from the abiotic environment to the world of living beings and their return to the abiotic world complete what we call the biogeochemical cycle.
The term is derived from the fact that there is a cyclic movement of elements that form living organisms (“bio”) and the geological environment (“geo”), where chemical changes intervene. In any ecosystem there are such cycles.
In any biogeochemical cycle there is the removal of the element or substance from its source, its use by living beings and later return to its source.
Let's take a closer look at each of the biogeochemical cycles below: