Aerobiont

An aerobiont is an organism, particularly a microorganism, that requires the presence of free oxygen (O₂) for its survival and metabolic processes. This oxygen is utilized as the terminal electron acceptor in cellular respiration, enabling the organism to extract energy from organic compounds through aerobic metabolism. Aerobionts thrive in oxygen-rich environments, relying on this gas for efficient energy production. Their growth and reproduction are contingent on oxygen availability, making them fundamentally different from organisms that can live without it.

Aerobiont meaning with examples

• The discovery of a new species of bacteria in a freshwater lake revealed it was a strict aerobiont. This meant the scientists had to cultivate it in a highly oxygenated environment. Without a constant supply of oxygen, the bacterium would cease to grow. Understanding this was key to keeping the bacterium alive and reproducing in their lab.
• Researchers studying the soil ecosystem discovered various aerobiont fungi participating in the decomposition of organic matter. Their presence suggested an active process of decay. These organisms, being dependent on oxygen, would not be found in anaerobic zones where oxygen is scarce. The fungi thrived in the open, well-aerated regions of the soil.
• The treatment of wastewater involves utilizing aerobic microorganisms, which act as aerobionts, to break down pollutants. These microbes are essential for the efficient purification of sewage. These microbes, requiring oxygen, work well in an activated sludge system. The microbes will consume the organic pollutants in the water if oxygen is pumped in.
• During the study of a deep-sea vent, the research team found no aerobiont species. The extreme pressure and lack of sunlight coupled with the absence of free oxygen meant no aerobionts. Any aerobic organism would not survive in the vent environment. This observation supported the concept of life adapting in oxygen-free environments.