Question

what does plant succesions mean

Answer 1

ECOLOGICAL SUCCESSION IS THE OBSERVE PROCESS OF CHANGE IN THE SPECIES STRUCTURE OF AN ECOLOGICAL COMMUNITY OVER TIME. THE TIME SCALE CAN BE DECADES (FOR EXAMPLE, AFTER A WILDFIRE), OR EVEN MILLIONS OF YEARS AFTER A MASS EXTINCTION.

Answer 2

Plant succession is a sequence of series from baren land to the climax i.e., where the vegetation develops. The same area, successively, is occupied by different plant communities in the course of time.
The plant succession can be primary or secondary.