There are two types of succession that occur on Earth. There is Primary succession and Secondary succession. Primary succession is when an environment fails and starts over or a natural disaster occurs and all that is left in the end is bare rock. Secondary succession is when an environment fails and starts over or a natural disaster occurs and only soil still remains. Pioneer species is the first species that comes back after an environment is wiped out and starts over. Climax community is when a environment is fully developed and has come back to its normal self after a natural disaster occurs.

Succession

Pioneer species

This pioneer species is lichen. Lichen appears during primary succession

This pioneer species is grass. Grass appears in secondary succession

This pioneer species is moss. Moss appears during primary succession

This pioneer species is liverwort. Liverwort appears in both primary and secondary succession

Lichen

Moss

Grass

Liverwort