Organisms that digest molecules in organic material and convert them into inorganic forms are called decomposers. They are classified as heterotrophic since they use organic substances in obtaining the energy and nutrients they need to survive. They are organisms that are responsible for breaking down decaying organisms into simple molecules in order to bring these back to the biogeochemical cycles into the ecosystem. In the food chain, they are the last step. Examples of these decomposers are fungi, snails and some insects. These organisms do not have an internal digestive organs since the the organic substrates undergo biochemical reactions only.
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Succession is not ever guaranteed to stop in any area due to the possibility of natural disasters, climate change, and disease. The climax within an area my exist for many years but the area always has the potential to be disrupted by unexpected events that may damage plant life.
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