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Question #45248
The Question
A stable terrestrial ecosystem experiences a prolonged period of severe waterlogging and a drastic drop in soil temperature. Based on the principles of ecosystem dynamics and energy flow, which of the following statements regarding the consequences of this environmental shift is INCORRECT?
Options
- A.
The standing state of inorganic nutrients will sharply decline because the transition from humification to mineralization is severely inhibited by anaerobiosis.
- B.
The standing crop of primary producers will temporarily increase because the massive accumulation of undecomposed organic detritus serves as a direct compensatory energy source.
- C.
Higher trophic levels will face a standing crop collapse as the metabolic energy expended in foraging begins to exceed the energy assimilated from a depleted prey base.
- D.
The detritus food chain (DFC) will be heavily retarded, leading to a buildup of dark, amorphous humus that is highly resistant to microbial action.
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
Humification vs Mineralization|Standing Crop quantification|Optimal Foraging Theory
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The strict distinction between 'Standing State' (amount of inorganic nutrients in soil) and 'Standing Crop' (mass of living organic material).
The trap relies on the common misconception that 'more organic matter/humus in the soil' automatically fuels plant growth.
Students must recall that plants cannot utilize organic detritus directly; it must first undergo mineralization by aerobic microbes into inorganic forms.
Without mineralization, the steady-state energy flow collapses.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biomolecules - Class 11 |
| Concept | Metabolic Flux and Steady State |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |