Biogeochemical Cycles Online Journals

 In ecology and natural science, a biogeochemical cycle or substance turnover or athletics of drugs may be a pathway by that a chemical substance moves through organic phenomenon (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth. There area unit biogeochemical cycles for the chemical parts atomic number 20, carbon, hydrogen, mercury, nitrogen, oxygen, phosphorus, selenium, and sulfur; molecular cycles for water and silica; large cycles like the rock cycle; moreover as human-induced cycles for artificial compounds like polychlorinated biphenyl (PCB). In some cycles there area unit reservoirs wherever a substance remains for a protracted amount of your time. Ecological systems (ecosystems) have several biogeochemical cycles in operation as a section of the system, for instance the water cycle, the carbon cycle, the organic process, etc. All chemical parts occurring in organisms area unit a part of biogeochemical cycles. additionally to being a section of living organisms, these chemical parts conjointly cycle through abiotic factors of ecosystems like water (hydrosphere), land (lithosphere), and/or the air (atmosphere).[1] The living factors of the world are often observed conjointly because the region. All the nutrients—such as carbon, nitrogen, oxygen, phosphorus, and sulfur—used in ecosystems by living organisms area unit a section of a closed system; so, these chemicals area unit recycled rather than being lost associate degreed replenished perpetually like in an open system