Compare primary and secondary succession of an ecosystem. what is the distinction between them? a) primary succession is the sequence of plants that colonize a new area, while secondary succession is the sequence of animals that move once plant life is established. eliminate b) primary succession is the sequence of species that become established early in a newly colonized area, while secondary succession is the sequence of species that move in much later. c) primary succession is the establishment of a new community in an existing ecosystem that was disturbed, while secondary succession is the establishment of a community in an area that was altered due to fire. d) primary succession is the establishment of a community in an area with no soil, while secondary succession is the establishment of a new community in an existing ecosystem that was disturbed by some catastrophic event.