Question

Explain how species interactions (facillitation, tolerance or inhibition) can affect succession

Answer 1

Facilitation model
It is a process where one or more species alter the environment make more suitable for one or more species to enter in large number. Eg. Nitrogen fixation by bacteria makes plant grown in that region.

Inhibition model

It is a process where one or more species alter the environment makes negative effect for other species prevent it growth. Eg, Soil-borne pathogens associated with particular plant that compete out
earlier in succession.

Tolerance model
It is a process where one or more species alter the environment but it not have any effect on some species. Eg. floral succession (secondary), in which all spp present as seed bank in soil.