Why are bacteria a necessary part of the nitrogen cycle

Bacteria are a necessary part of the nitrogen cycle because living things cannot use atmospheric nitrogen.

Further Explanation:

The nitrogen cycle is the series of processes that lead to the interconversion of nitrogen and its compounds in the atmosphere. Bacteria are required in the nitrogen cycle because atmospheric nitrogen cannot directly use by the plant. Amino acids can be formed by the combination of ammonium ion and carbon skeletons. The anaerobes like Clostridium and facultative gram-negative enteric species of Klebsiella and salmonella are few nitrogen-fixing bacteria found in the soil. There can also be a symbiotic association of organisms, such as rhizobial bacteria and legumes, which aid in nitrogen fixation. Cyanobacteria are the main nitrogen fixers in the ocean and freshwater. Nitrifiers quickly oxidize the fixed form of nitrogen into nitrate or nitrite to nitrate by the process of nitrification.

Bacteria play a crucial role:

• Nitrogen-fixing bacteria transform the atmospheric nitrogen to nitrates.

• Bacteria of decay transform decaying nitrogen waste to the ammonia.

• Nitrifying bacteria transform ammonia into the nitrates/nitrites.

• Denitrifying bacteria mainly convert nitrates to nitrogen gas.

Learn more:

1. Learn more about the abiotic factor link

2. Learn more about the cellular respiration link

3. Learn more about the primary and secondary succession link

Answer Details:

Grade: High School

Subject: Biology

Chapter: Plant Physiology

Keywords:

Nitrogen fixation, gases, bacteria, role, soil, denitrifying, ocean, freshwater, cyanobacteria, negative enteric, Klebsiella, clostridium, nitrites.

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