In Nature everything is circulated. The two broad categories of global cycles are sedimentary and biological. A short but insightful article. http://www.libraryindex.com/pages/3191/Biogeochemical-Cycles.html The chemical elements that compose the Earth are…
(Sources: http://www.bbc.co.uk/schools/gcsebitesize/geography/ecosystems/index.shtml & http://en.wikipedia.org/wiki/Biogeochemical_cycle ) Ecosystem Cycles: Energy and Nutrient Transfers All ecosystems depend on two important processes: The flow of energy, and the recycling of nutrients. These processes take place in Energy and…
http://homepages.nyu.edu/~pet205/biogeochem1.html BIOGEOCHEMICAL CYCLES Biogeochemical Cycle : the cycling of chemical elements required by life between the living and nonliving parts of the environment. Some examples of these chemical elements are…