Question

The gradual and predictable change in species composition in an area is known as:

• A. Succession
• B. Evolution
• C. Mutation
• D. Speciation

Hint:

*Key takeaway:* Succession = gradual change in species composition over time. Primary succession starts from bare rock, while secondary succession occurs in areas with existing soil.

Answer 1

The Correct Option is A

The gradual and predictable change in species composition in an area is known as Succession.

Succession is a key concept in ecology, describing the sequential transformation of ecosystems over time. This process involves the progressive replacement of one community by another until a stable climax community is reached. There are two main types of succession:

1. Primary Succession: Occurs in lifeless areas, such as regions devoid of soil, where organisms gradually colonize the area (e.g., lava flows or areas left by retreating glaciers).
2. Secondary Succession: Takes place in areas where a disturbance has destroyed a community but left the soil intact (e.g., after forests are cleared by wildfires).

Understanding succession helps ecologists predict how an ecosystem will change following a disturbance, allowing for better conservation and management strategies.