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Ecological succession refers to the process of gradual change and replacement of species in a community over time. This concept illustrates how ecosystems can develop from bare substrates or disturbed areas, leading through a series of stages until a stable climax community is established. For example, after a forest fire, an area may initially be colonized by pioneer species such as grasses and weeds. Over time, these species may be replaced by shrubs, and eventually, trees will grow, leading to the re-establishment of a forest ecosystem.

Succession can be categorized into primary succession, which begins in lifeless areas with no soil, and secondary succession, which occurs in areas that have been disturbed but still have existing soil. This process is significant because it contributes to biodiversity, ecosystem stability, and resource use efficiency in natural environments. Understanding ecological succession is crucial for effective conservation strategies and managing ecosystems to promote recovery and resilience.