What is meant by the term "biogeochemical cycle"?

The term "biogeochemical cycle" refers to the circular pathways through which nutrients and elements move through the biotic (living) and abiotic (non-living) components of the Earth. This includes processes that cycle essential elements such as carbon, nitrogen, phosphorus, and water through ecosystems, involving various transformations and exchanges between the atmosphere, soil, and living organisms.

Understanding these cycles is crucial because they illustrate how nutrients are recycled and maintained in ecosystems, supporting life and influencing ecosystem functions. The dynamic nature of these cycles demonstrates the interconnectedness of biological, geological, and chemical processes, which play a significant role in sustaining life on Earth and maintaining ecological balance.

The definition captures the essence of these processes, emphasizing the continuous movement and transformation of key substances that are vital for the health of ecosystems.