EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -Secondary succession occurs on a surface where an ecosystem has previously existed. This happens after some sort of disturbance. Vegetation has already been present in the area, but it no longer exists. Primary succession only occurs on a surface where no ecosystem existed before.

Detailed explanation-3: -When appropriate food sources exist, new animal populations may thrive in an ecosystem. The process by which communities are established, develop and change in ecosystems is called succession.

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 starts when a disturbance (such as wind storms, insect outbreaks, logging, avalanches, bulldozers, or fire) leaves the soil intact. Seeds, spores, and roots usually remain as well. Sites that begin with secondary succession reach the next stage more quickly than during primary succession.