Some bacteria can survive without oxygen, such as those used in biogas generators. When the chemical process is not completed, nitrous oxide (N 2 O) can be formed. Other bacterial organisms use the ammonia to produce compounds called nitrates and nitrites. It is only when the cycle is not balanced that problems occur. Water - Lack of water will slow or prevent decay Water is needed for transport and to support reactions inside organisms. It is a continuous cycle that is maintained by the decomposers and nitrogen bacteria. Choose the correct sequence of this cycle: (a) CO 2 in atmosphere→ decomposers → organic carbon in animals → inorganic carbon in soil (b) CO 2 in atmosphere → organic carbon in plants →organic carbon in animals → inorganic carbon in soil Decay cycle refers to breakdown of complex organic matters present in dead and decaying plant and animal bodies into the simpler substances. Decay organisms need water to digest their food. The process uses oxygen and lack of oxygen slow down the decay cycle. This is because ecosystems depend on recycling in order to function. The nitrogen cycle can be broken down into four types of reaction and micro-organisms play roles in all of The nitrogen cycle would not be possible without decomposers, because the decomposers role is to break down the nitrogen containing chemicals into simpler chemicals. This ammonia is converted to nitrates by nitrifying bacteria. A decomposer is an organism that breaks down dead plant or animal matter. Q3. Decomposers are the microbial heterotrophs and include fungi as well as bacteria. Published: essentialARB, Issue 4 - 2001 Fungi are fundamental to the success and health of almost every ecosystem on earth, both terrestrial and aquatic, and essential to the sustainability of biodiversity. Organisms use this form of nitrogen to produce amino acids. The nitrogen cycle is a five-step process that produces a fixed form of nitrogen. During the first step, nitrogen-fixing bacteria take in nitrogen from the atmosphere and use it to produce ammonia. These nutrients continue the cycle as producers use them to grow. Decomposers break down the bodies of dead organisms, urine and faeces resulting in nitrogen being returned to the soil as ammonia. The nitrogen cycle is a series of processes that converts nitrogen gas to organic substances and back to nitrogen in nature. There is always a cycle of CO 2 running in the atmosphere due to which the concentration of CO2 remains constant in the atmosphere. This is of concern, as N 2 O is a potent greenhouse gas – contributing to global warming. What will happen is that something like those things will evolve pretty quickly. They serve in decay cycle. What would happen to ecosystems without decomposers? If bacteria and fungi did not break down dead organisms, energy and valuable nutrients would remain trapped within the dead organisms. 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