Which of the following is an example of a density-independent limitation on a population?

• A. Increased predation
• B. A severe drought
• C. Competition for food
• D. Spread of disease

Answer: (B)

Verified step by step guidance

1. Understand the concept of density-independent factors: These are factors that affect population size regardless of the population's density. They are typically abiotic factors such as weather, natural disasters, or human activities.
2. Identify the options given in the problem: Increased predation, a severe drought, competition for food, and spread of disease.
3. Analyze each option: Increased predation, competition for food, and spread of disease are density-dependent factors because their impact varies with population density.
4. Consider the option of a severe drought: This is an abiotic factor that can affect a population regardless of its density, making it a density-independent factor.
5. Conclude that a severe drought is an example of a density-independent limitation on a population, as it impacts the population size regardless of how many individuals are present.