Reservoir: Reservoirs are places where essential elements are sequestered for long periods of time. biogeochemical cycle: A pathway by which a chemical element or molecule moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydroshere) compartments of the planet.
"Function of a reservoir in a nutrient cycle is to meet the deficit which occurs due to imbalance in the rate of influx & efflux. Give an account of energy flow in an ecosystem."
