Final answer:
Succession is the process of change in an ecological community over time. Mechanisms of succession include ecological facilitation, climax community, and pioneer species.
Step-by-step explanation:
Succession is the process of change in the species structure of an ecological community over time. There are several mechanisms by which succession may take place. Ecological facilitation occurs when one species makes it easier for another species to become established in an area. Climax community refers to a stable and mature community that is the endpoint of succession. Pioneer species are the first organisms to colonize a newly formed or disturbed ecosystem and initiate the process of succession.