NEET BIOLOGY

Detailed explanation-1: -Disturbances act to disrupt stable ecosystems and clear species’ habitats. As a result, disturbances lead to species movement into the newly cleared area (secondary succession). Once an area is cleared there is a progressive increase in species richness and competition between species takes place.

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: -Secondary succession begins after a disturbance, like a fire. Crucially, some soil and nutrients remain present-fire, in fact, may help recycle those nutrients.

Detailed explanation-4: -Secondary succession began in many areas when farm fields were abandoned., begins when a disturbance, such as a fire, logging, or farming, dramatically alters an existing community but does not destroy all living things or all organic matter in the soil.