Succession is a long-standing alteration in the makeup of populations. Not like the feats of natural disasters and seasons, succession is brought on by the actions of existing organisms who occupy the surroundings. Over many episodes of eras, the environment is tailored by these inhabitants so it becomes suitable for colonization by another species and less suitable for those already there. These original species can not compete with the new species, who are better equipped to exploit the improved conditions, so the initial organisms are ultimately defeated and disappear.
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