DENDROLOGY

Detailed explanation-1: -There are two major types of ecological succession: primary succession and secondary succession.

Detailed explanation-2: -In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed-disrupted-then recolonized following the disturbance.

Detailed explanation-3: -Secondary succession is more common and usually occurs faster than primary succession because the substrate is already present. Secondary succession occurs on a surface where an ecosystem has previously existed.