SUCCESSION: Primary succession- The savanna’s primary succession would be if their inactive volcano erupted and lichen, moss and other pioneer things started to grow from scratch. This would then move on to more advanced plant life then animal life will start move in and create a new ecosystem.
Secondary succession:It is one of the two types of ecological succession of plant life ,it is a process started by an event that reduces an already established ecosystem.to a smaller population of species, and as such secondary succession occurs on preexisting soil whereas primary succession usually occurs in a place lacking soil.