Question

The intermediate disturbance hypothesis was proposed to explain patterns of:

• A. species redundancy.
• B. species diversity.
• C. species dispersal.
• D. species extinctions.

Hint:

To understand the intermediate disturbance hypothesis:
1. Remember that diversity is maximized at intermediate disturbance levels.
2. Low disturbance favors dominance, while high disturbance limits survival.
3. Intermediate levels allow a mix of colonizing and competitive species to coexist.

Answer 1

The Correct Option is B

Step 1: Understanding the intermediate disturbance hypothesis. The intermediate disturbance hypothesis states that species diversity is highest in ecosystems experiencing intermediate levels of disturbance. Disturbances can be natural (e.g., storms, fires) or anthropogenic (e.g., deforestation), and they affect community structure and species composition. Step 2: Explanation of the hypothesis.
Low levels of disturbance allow dominant species to outcompete others, reducing diversity.
High levels of disturbance create harsh conditions where only a few species can survive.
Intermediate levels of disturbance balance competition and environmental stress, supporting the coexistence of a larger number of species and thus maximizing diversity. Step 3: Evaluate the options. Option (A): Species redundancy refers to multiple species performing similar ecological functions, unrelated to the hypothesis.
Option (B): Species diversity is the correct answer, as the hypothesis directly addresses how disturbances influence diversity.
Option (C): Species dispersal refers to the movement of species across regions, which is not the focus of this hypothesis.
Option (D): Species extinctions are an indirect consequence of extreme disturbances but are not the primary pattern explained by the hypothesis.