Bacteria are the unicellular organisms and cannot be seen with naked eye. There is no particular method of cell division, they simply divide by binary fission in which cell divides into two daughter cells. They do not have proper nucleus within the cell but the genetic material is attached to the cell membrane in an irregular form. They are found everywhere like top of the mountains, rivers, on land and in ice. Bacteria have the property of living in extreme weathers like extreme cold and extreme heat. They are able to live long because they become inactive for a long period of time.

Bacteria play an important role in the environment: Decomposition of Dead/Complex Organic Matter:

Ever imagined the fate of nature with dead matter of animals/plants lying around? Bacteria play a very crucial role of silently getting the nature rid of the dead matter through the decomposition of dead organic matter by the micobes. Bacteria use them as a source of nutrients, and in turn help in recycling the organic compounds trapped in the dead matter. Through this process, other organisms also get benefited, who can use the simpler forms of organic compounds/nutrients released from the dead matter by various bacteria.

Bioremediation by bacteria Bioremediation refers to the process of depletion/degradation of toxic compounds present in the natural environment by living organisms. Bacteria are one of the key players in Bioremediation. For example, oil spills due to oil digging operations or accidents on oil transport channels in the ocean or on the soil, is highly determinant to the healthy environment. Bacteria like Pseudomonas have been well known for the degradation of oil spills on oceans/soils.

Similarly, Contamination of heavy metals in the environment is a major global concern because of their toxicity and

threat to human life and environment. Bacteria like Alcaligenes faecalis (Arsenic),Pseudomonas fluorescens and Enterobacter clocae (Chromium) are well known for heavy metal uptake/compound metabolism. Waste Water Treatment Owing to their characteristics of degrading harmful chemicals and pollutants, bacteria naturally (as well as deliberately used by industries), help in treatment of waste water.

Image source: biologia.laguia2000.com

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Role of Bacteria in Environment - Biotechnology Forums

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