Quoting in the book Environmental Biology published by Muhammadiyah University Press, the purpose of the biogechemical cycle is to realize the stability of nature, especially on earth. Meanwhile, the function of the biogechemical cycle is to maintain the circulation of chemical elements in nature that are needed by organisms for their survival.
The biogechemical cycle consists of several cycles that move according to their roles. Check out the explanation below to find out the cycles that occur in nature in terms of the biogechemical cycle, quoted from the book Biology SMA/MA Class X Diknas by Gunawan Susilowarno, et al.
Water has an important role in the life of living things on earth because it has good benefits for the body. Water is also the most abundant component of the lithosphere, atmosphere, and in the body of organisms.
The rainwater enters the soil cavity and flows up to the ocean. Meanwhile, the water that flows into the river is used by organisms for various needs, which in the end the water evaporates and returns to the initial process.
2. Carbon and Oxygen Cycle
Carbon and oxygen are the most basic constituents of organic compounds. The source of carbon in nature is CO2 gas which first enters life through stomata in the photosynthesis process of plants.
The product of photosynthesis is oxygen which is used in the respiration process. When this process occurs, carbohydrates will be converted into several forms of compounds such as energy, CO2, and H2O which form a short cycle of CO2 and O2 on a regular basis.
Meanwhile, the long cycle path of carbon and oxygen can occur if there are bacteria that act as decomposers of dead organisms.
Nitrogen on earth is needed to form proteins and essential organic molecules. There is about 79% of the element nitrogen in the air, but only lower organisms can use it like bacteria and blue algae.
Plants use nitrogen in the form of Nitrate Ions or Ammonium Ions. Nitrogen can also be fixed into Ammonia in an event called Ammonification.
Phosphorus is the smallest part of the DNA of living things and is present in every cell membrane structure. Phosphorus in animals and humans is found in large amounts, especially in the bones.
The phosphorus cycle is different from several other cycles. Phosphorus is not a gas, but is found in sedimentary rocks. Plants get phosphorus from water dissolved in the soil, while animals get phosphorus from the plants they eat.