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Question #46621
The Question
In a forest ecosystem, two closely related insectivorous bird species initially compete for the exact same prey population, causing severe, high-amplitude population crashes in the prey. Over evolutionary time, they evolve to forage in different regions of the canopy, akin to MacArthur's warblers. Which of the following best describes the resulting impact on the ecosystem's population dynamics?
Options
- A.
The prey population will exhibit increased oscillation amplitude due to continuous, spatially distributed predation pressure.
- B.
The predator-prey system will stabilize into dampened micro-cycles, significantly reducing the severity of prey population crashes.
- C.
One predator species will inevitably be eliminated according to Gause's Competitive Exclusion Principle, despite the foraging shift.
- D.
The fundamental niche of both predators will become identical, leading to a rapid decline in the prey's carrying capacity.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Predator-Prey Oscillations|Alien Species Invasion Impacts|Biotic Interactions
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize MacArthur's warblers as a static example of 'co-existence' without understanding its dynamic impact on the prey population.
The common misconception is that Gause's principle is an absolute rule that always ends in extinction (Option C), failing to recognize resource partitioning as the evolutionary mechanism that dampens Lotka-Volterra oscillation amplitudes and stabilizes the ecosystem.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Organisms and Populations - Class 12 |
| Concept | Predator-Prey Oscillations |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |