Nitrogen Cycle:
The Nitrogen Cycle is the series of processes by which notrogen and its compounds are interconverted in the environment and in the living organisms, including nitrogen fixation and decomposition. When a plant dies, it gives off nitrogen into the soil and water - or when herbivores, which have consumed plants, die or excrete nitrogen. This release of nitrogen goes through nitrogen fixation when absorbed by bacteria and creates nitrates or nitrites. This is then absorbed through the plants and eaten by herbivores and carnivores. When these organisms die or excrete waste, the nitrogen is then released back into the environment. The nitrogen is then broken down and converted into ammonia through ammonification. When plants absorb this, bacteria breaks it back down into nitrates through nitrification. Through denitrification, the nitrates are brought back into the environment as nitrogen gas (completing the nitrogen cycle) by bacteria that use the nitrate as an electron acceptor in place of oxygen. Since the rainforest is so big, nitrogen is a significant ingredient in the global nitrogen cycle. Many tropical rainforests are limited in their growth due to low nitrogen levels because large quantities are absorbed into the soil, and even into the water as dissolved nitrogen