Final answer:
Ecological succession is the process of community change over time as species replace each other. It can be primary or secondary succession.
Step-by-step explanation:
Ecological succession is the process by which a community changes over time as different species replace each other. This happens after a disturbance or a change in the ecosystem, and new communities develop and replace previous ones. There are two types of succession: primary succession which occurs in areas never before colonized by living things, and secondary succession which occurs in areas previously colonized but then disturbed.