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Question #46681
The Question
Habitat loss and fragmentation, a primary driver of the 'Evil Quartet', often breaks large contiguous forests into smaller patches. While natural ecotones typically exhibit a positive 'Edge Effect' with high biodiversity, how does severe anthropogenic fragmentation fundamentally alter this dynamic for native interior species?
Options
- A.
It amplifies the positive edge effect, allowing interior species to exploit the agricultural matrix for secondary succession.
- B.
It transforms the ecotone into an 'ecological trap', where an increased edge-to-area ratio exposes native species to higher predation and invasive incursions.
- C.
It causes a complete loss of the ecotone, forcing native species to undergo sympatric speciation within the fragmented core.
- D.
It reverses the edge effect by decreasing the overall perimeter of the habitat, thereby reducing the carrying capacity of the ecotone.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Phytoplankton|Detritus|Mineralization|Hydrarch_vs_Xerarch_Convergence
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize 'Edge Effect = High Biodiversity = Good' without context.
The trap lies in failing to integrate this with the 'Evil Quartet' (Habitat Fragmentation).
When a habitat is artificially fragmented, the increased edge-to-area ratio becomes detrimental, acting as an 'ecological trap' where native interior species are disproportionately exposed to predators and invasive species.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Primary Succession Facilitation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |