A balance of nitrogen compounds in the environment supports plant life and is not a threat to animals. It is a continuous cycle that is maintained by the decomposers and nitrogen bacteria. Decomposers are the microbial heterotrophs and include fungi as well as bacteria. There is always a cycle of CO 2 running in the atmosphere due to which the concentration of CO2 remains constant in the atmosphere. Water - Lack of water will slow or prevent decay Water is needed for transport and to support reactions inside organisms. They serve in decay cycle. Decay organisms need water to digest their food. Q3. 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. This is because ecosystems depend on recycling in order to function. When the chemical process is not completed, nitrous oxide (N 2 O) can be formed. Decomposers break down dead organic materials and release nutrients into the soil or water. This video explains abour Decomposers and Decay The process uses oxygen and lack of oxygen slow down the decay cycle. What will happen is that something like those things will evolve pretty quickly. These nutrients continue the cycle as producers use them to grow. What would happen to ecosystems without decomposers? This is of concern, as N 2 O is a potent greenhouse gas – contributing to global warming. Decomposers break down the bodies of dead organisms, urine and faeces resulting in nitrogen being returned to the soil as ammonia. The major decomposers are bacteria and fungi. FUNGI - LIFE SUPPORT FOR ECOSYSTEMS Andrew Cowan N.D.Arb. Some bacteria can survive without oxygen, such as those used in biogas generators. This may arouse the yuk response in many readers, but the fact is that ecosystems could not function without decomposers. Decomposers may even become food themselves when they are attached to a … During the first step, nitrogen-fixing bacteria take in nitrogen from the atmosphere and use it to produce ammonia. This ammonia is converted to nitrates by nitrifying bacteria. If bacteria and fungi did not break down dead organisms, energy and valuable nutrients would remain trapped within the dead organisms. 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 Without decomposers, the bodies of dead animals and plants will begin to pile up. It is only when the cycle is not balanced that problems occur. The nitrogen cycle would not be possible without decomposers, because the decomposers role is to break down the nitrogen containing chemicals into simpler chemicals. 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