AP BIOLOGY

Detailed explanation-1: -It occurs when the preexisting mature or intermediate community in a region has been partially or completely wiped out due to disturbance caused by natural events such as severe floods, droughts, forest fires, or storms or by human interventions such as deforestation, agriculture, overgrazing, etc.

Detailed explanation-2: -Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.

Detailed explanation-3: -In secondary succession, a previously occupied area is re-colonized following a disturbance that kills much or all of its community. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. Wildfires will burn most vegetation and kill animals unable to flee the area.

Detailed explanation-4: -Secondary succession happens when a climax community or intermediate community is impacted by a disturbance. This restarts the cycle of succession, but not back to the beginning-soil and nutrients are still present.

Detailed explanation-5: -Secondary Succession Stages An area of growth. A disturbance such as fire begins. The fire destroyed the vegetation. The fire leaves behind empty but does not destroy the soil.