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Question #46010
The Question
Given below are two statements regarding ecosystem dynamics and the 'edge effect':
Statement I: In an ecotone, the 'edge effect' typically results in increased species density and diversity due to the convergence of microhabitats from adjacent ecosystems. Statement II: In a strictly nutrient-limited ecotone, this increased species diversity invariably leads to a proportional increase in net secondary productivity due to enhanced stratification efficiency.
Choose the correct answer from the options given below:
Options
- A.
Both Statement I and Statement II are correct
- B.
Both Statement I and Statement II are incorrect
- C.
Statement I is correct but Statement II is incorrect
- D.
Statement I is incorrect but Statement II is correct
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
Stratification Efficiency|Ecotone and Edge Effect|Secondary Productivity
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often blindly apply the general rule that 'higher biodiversity equals higher productivity' (Tilman's plots) without accounting for the Limiting Factor Principle.
The trap lies in the word 'invariably' in Statement II.
In nutrient-limited ecotones, the edge effect causes severe resource competition, which can decouple high species richness from net secondary productivity.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Secondary Productivity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |