The reservoir for the gaseous type of biogeochemical cycle exists in
Atmosphere
The reservoir of the gaseous type of biogeochemical cycles, for example, nitrogen, carbon cycles exist in the atmosphere. Ionosphere is the layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio waves. Lithosphere is the rigid outer part of the earth, consisting of the crust and upper mantle. Stratosphere is the zone of ozone gas.