Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field
Primary succession is the colonization of living organisms into an area that was not previously colonized by any living things. A Secondary succession is the regeneration of the living community after a major disturbance.
