The reason an ambulance sien sounds higher in pitch as it approaches you is because the ambulance pushes the sound waves together. This results in the sound wavelengths in front of the ambulance getting shorter Which of the following statements is true?

Secondary succession refers to the process which starts by an event such as harvesting, hurricane, forest fire, and clear-cutting. These events aid in reducing the previously established ecosystem.  

Further Explanation:

Ecological succession refers to the process of alteration in the structure of species of the ecological community over the time span. The time scale can be decades or more. The community starts with comparatively few developing animals as well as plants. It then develops via the elevating complexity unless it turns stable as a climax community. Ecological succession can be of 2 kinds, namely, primary and secondary succession.

In primary succession, the successional dynamics begins with the colonization of the region which has not been engaged by any ecological community like newly exposed sand regions and lava flows. Animals start to return when there is the availability of food for them to consume.

On the other hand, in secondary succession, the successional dynamics occur after an extreme disturbance or elimination of the pre-existing. The dynamics are strongly affected by the pre-disturbance situations such as seed banks, soil development, as well as residual living organisms. An example of this can be natural regeneration after the clear-cutting of the mixed and mature species forest in North America.

Learn more:

Learn more about abiotic factor of an ecosystem

Learn more about primary and secondary succession

Learn more about product of photosynthesis

Answer Details:

Grade: High School

Subject: Biology

Chapter: Ecology

Keywords:

Ecological succession, primary succession, secondary succession, clear-cutting, climax community, soil development, regeneration, North America, dynamics, species.