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Question #46026
The Question
In a stable climax forest ecosystem, the majority of essential nutrients are sequestered within the standing crop biomass, ensuring a tight nutrient cycle. If a severe edaphic shift, such as a drastic drop in soil pH, causes rapid nutrient immobilization (e.g., phosphorus fixation), what will be the most likely ecological consequence?
Options
- A.
The climax community will collapse because the soil reservoir can no longer release limiting nutrients, breaking the facilitation feedback loop.
- B.
The standing state of the ecosystem will increase, providing a buffer that maintains the stability of the climax community.
- C.
The rate of detritus decomposition will accelerate to compensate for the immobilized nutrients, maintaining the standing crop.
- D.
Pioneer species like crustose lichens will immediately invade the forest floor to solubilize the immobilized phosphorus.
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
Ecological Succession Climax|Primary Succession Facilitation
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize that 'climax communities are stable and in equilibrium with their environment' without understanding that this equilibrium is thermodynamically dependent on continuous, efficient nutrient cycling.
The trap lies in assuming climax communities are immune to edaphic (soil) changes, or confusing the total mineral content of the soil with the biologically available 'standing state'.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Nutrient Immobility |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |