After carbon, oxygen is one of the most abundant elements on earth. It combines other elements like nitrogen, sulphur and maintains other cycles. Free in the air and dissolved in water, in excess of uncombined elements in the atmosphere, oxygen is second only to nitrogen. Oxygen Cycle. In intervening steps the oxygen is incorporated in water, and in this form it can interlink with the water cycle or indirectly with carbon cycle. As we are aware oxygen is absolutely essential for all living organisms to survive. Cycle - A cycle shows the reusing of certain elements and compounds (e.g. The cycle of energy is based on the flow of energy through different trophic levels in an ecosystem. Thus, free oxygen gas is added to the atmosphere as a by-product of photosynthesis, and in this way, the oxygen cycle in nature is completed. The oxygen cycle is interconnected with the carbon cycle. The food carbohydrate is respired by the help of oxygen and release energy. In the simple example of the oxygen cycle shown below, you can see how oxygen is used and cycled by plants and animals. In fact, the major source of oxygen or major supplier of oxygen to the atmosphere is green plants which supply oxygen to the atmosphere through the process of photosynthesis. Cycles in Nature. In order to respire, plants and animals use oxygen and return it … The cycle of oxygen, the distribution of oxygen through nature in different ways. The Oxygen Cycle Oxygen is constantly being used and created by different processes on planet Earth. Energy moves life. It can only be transformed from one form to another. Thus oxygen enters organisms only through respiration and leaves through photosynthesis. The nutrient cycle describes the use, movement, and recycling of nutrients in the environment. Law of Conservation of Matter - Matter cannot be created nor destroyed in any chemical reaction. It is also an atom in the molecule of water (H 2 O). The quantity of oxygen is 20.95% in the atmosphere, which is maintained by oxygen cycle. The released oxygen from the photosynthesis is transferred to the higher trophic levels as starch, sugar, and food carbohydrate. Nitrogen, a component of proteins and nucleic acids, is essential to life on Earth. All of these processes together make up the oxygen cycle. Although 78 percent of the atmosphere is nitrogen gas, this gas is unusable by most organisms until it is made available by a series of microbial transformations. ; Water Cycle. The oxygen cycle is simple. a. The oxygen is the atmosphere is the source of ozone (O 3). Valuable elements such as carbon , oxygen, hydrogen, phosphorus , and nitrogen are essential to life and must be recycled in order for organisms to exist. About 21% of our air is composed of oxygen. Oxide compounds, such as CO2 also contain oxygen. Nitrogen cycle, circulation of nitrogen in various forms through nature. Our ecosystem is maintained by the cycling energy and nutrients obtained from different external sources. Oxygen cycle The cyclic process by which oxygen element is circulated continuously through the living and non-living components of the biosphere constitutes oxygen cycle. In nature, this gas is released by volcanic activity, and by the respiration of animals who affix carbon molecules from the food they eat to molecules of oxygen before exhaling it. water, carbon, oxygen, nitrogen, phosphorus) in different forms in ecosystems.