DENDROLOGY

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FOREST ECOLOGY

FOREST SUCCESSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Pioneer species, such as lichen and moss inhabit an area after a major disturbance, such as volcanic eruption. Over time, other species are found in the disturbed area, and the number of pioneer species decreases. Why does the number of pioneer species decrease?
A
The amount of available sunlight is reduced
B
The area has more soil to support complex plants. The competition decreases the pioneer species role
C
The area is more susceptible to the wind. Seeds are captured in the pioneer plants and germinate at thigh rate
D
The temperature is not as extreme as it was. Fewer pioneer species reproduce
Explanation: 

Detailed explanation-1: -Primary Succession Overview Primary succession begins with the appearance of pioneer species – lichen, mosses, and fungi – all organisms that can grow on rocks and exposed land.

Detailed explanation-2: -The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment. Secondary succession occurs after a disturbance such as a forest fire, where there is still some organic matter to allow new plants to grow.

Detailed explanation-3: -After the disturbance, pioneer species move in first. They include bacteria and lichens that can live on bare rock. Along with wind and water, these pioneer species help to weather the rock and form soil. Once soil begins to form, other plants can move in.

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