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How does nitrogen in dead organisms get released back into soil?
A dead organisms nitrogen rich compounds are taken in by decomposers or are released back into the environment. The compounds are either recycled again by soil micro-organisms or are converted by detrifying bacteria back into nitrogen gas.Answer this question…
What organisms return nitrogen back into the air?
Organisms like bacteria and fungi play a role in returning nitrogen back into the air through a process called denitrification. During denitrification, these organisms convert nitrates in the soil back into nitrogen gas, which is then released into the atmosphere. This helps to maintain the balance of nitrogen in the ecosystem.
What is the role of decomposes in the nitrogen cycle?
Decomposers have a very important role in the nitrogen cycle. They convert nitrogen found in other organisms into ammonia so it can be returned to the soil. Some use a process called denitrification to return nitrogen directly to the atmosphere.
What role do consumer in the nitrogen cycle?
Consumers play a role in the nitrogen cycle by obtaining nitrogen from consuming plants or other organisms. Through their waste and decomposition, they release nitrogen back into the environment for plants to use again. This helps maintain the balance of nitrogen in ecosystems.
How do living organisms obtain their nitrogen requirement?
All organisms need nitrogen to live and grow. Plants take up nitrate ions from the soil, they are then absorbed into roots by active transport, the plant then produces nitrogen-containing compounds such as protein. This nitrogen then gets into the food web as primary consumers feed on plants and obtain the nitrogen-containing compounds. However, the atmosphere is made up of 78% nitrogen and is unavailable in this form to organisms. This is due to the triple bond between the two N atoms causing it to be inert. To be used by organisms, it must be converted to a chemically available form, such as ammonium (NH4+), nitrate (NO3-), or urea ((NH3)2CO). There are five main processes that convert nitrogen to a more accessible form. They are; nitrogen fixation, nitrogen uptake, decay process, nitrification and denitrification. The first process I will talk about is nitrogen fixation. There, the nitrogen is converted to ammonium; it is the only way organisms can obtain nitrogen directly from the atmosphere. The only organism that can fix nitrogen through metabolic process is bacteria from the genus Rhizobium. The nitrogen fixers are usually found on host plants, but there are also nitrogen fixing bacteria found without host plants. They are known as free-living nitrogen fixers, e.g. in the aquatic environment a very important nitrogen fixer would be cyanobacteria. Nitrogen fixation can also be carried out in high-energy natural events, such as lightning and forest fires. The high-energy breaks the triple bond between the two nitrogen atoms producing a significant amount of single nitrogen atoms available for use. The next process is nitrogen uptake, this is where plants or bacteria itself makes use of the ammonia produced by the nitrogen fixing bacteria. The ammonium is converted from NH4+ to N to make protein or other nitrogen containing compounds. A very important process that returns nitrogen back to the nitrogen cycle for use is the decay process. When organisms, die, nitrogen is converted back into inorganic nitrogen by a process called nitrogen mineralization. Decomposers consume the organic matter and this leads to decomposition. Nitrogen contained within the dead organism in converted to ammonium, it is then available for use to plants, or transformed into NO3- (nitrification). Through the nitrogen cycle, food-making organisms obtain necessary nitrogen through nitrogen fixation and nitrification. Nitrogen compounds are returned to atmosphere and soil through decay and denitrification. In crops, few plants are left to decay back into soil, so the nitrogen cycle doesn't supply enough nitrogen to support plant growth. Therefore natural or artificial fertilizers containing NO3- or NH4+ compounds are added.
