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Question #46690
The Question
According to ecological principles, warm and moist environments generally favor decomposition. However, if a terrestrial ecosystem experiences prolonged waterlogging, it drastically alters the decomposition dynamics. Which of the following statements INCORRECTLY describes the ecological fallout of this event?
Options
- A.
The waterlogged conditions induce anaerobiosis, which severely inhibits the catabolic activities of aerobic bacteria and fungi.
- B.
The excessive moisture accelerates the mineralization of recalcitrant humus, releasing abundant inorganic nutrients that spike Net Primary Productivity (NPP).
- C.
The ecosystem experiences nutrient immobility as essential elements like nitrogen and phosphorus remain locked within undecomposed organic complexes.
- D.
The failure to release bioavailable inorganic nutrients limits plant biomass production, causing a trophic cascade that plummets secondary productivity.
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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
Robert Costanza|Ecosystem Stability|Keystone Species
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize the NCERT line 'warm and moist environment favors decomposition' but fail to distinguish between optimal soil moisture and 'waterlogging'.
Waterlogging leads to anaerobic saturation, which acts as a limiting factor, inhibiting mineralization and causing nutrient immobilization.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Ecosystem Service Valuation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |