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Explain The Stages Of Succession

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Primary succession begins in barren areas, such as on bare rocks exposed by a retreating glacier. The first inhabitants are lichens or plants-those that can survive in such an environment . Over hundreds of years these “pioneer species” convert the rock into soil that support simple plants such as grasses. These grasses further modify the soil, which is then colonized by other types of plants. Each successive stage modifies the habitat by altering the amount of shade and the composition of the soil. The final stage of succession is a climax community, which is a very stable stage that can endure for hundreds of years. Primary succession occurs in essentially lifeless areas- regions in which the soil is incapable of sustaining life as a …show more content…
They get their food from the sun and make their own organic molecules which is what we can photosynthesis . Consumers come second and they eat or consume food to obtain energy. Herbivores are animals that only producers or plants such as sheets, cows, and deers. Carnivores are animals that only eat meat or other consumers such as lions, tigers, and alligators. Omnivores are animals that eat both plants and meat. Some animals that eat both plants and animals are grizzly bears, striped skunks, and raccoons.Detritivores or Scavengers feed on dead organisms. Decomposes break down organic matter in the soil and return it to the earth. Trophic levels are the steps in a food web, chain, or food pyramid like when a frog eats a fly, and then a snake eats the frog and them a hawk eats that snake. That is an example of a trophic level.Ecological pyramids show the exact amount of matter and energy for each trophic

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