The first biotic species that develops in a bare area is termed as 'pioneer species'. E.g., Lichens on rock, Phytoplanktons and Zooplankton in pond.
The last community in biotic succession which is relatively stable and is near equilibrium with the environment of that area is called 'climax community'. e.g., Forests
Whole sequence of events occuring in biotic succession is called 'sere'
