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Nature & Animals

Which effect results when soil microbes in a nitrogen-poor environment consume available carbon?

A)Decreased plant available nitrogen
B)Increased rate of photosynthesis
C)Enhanced soil water retention
D)Accelerated erosion of topsoil

💡 Explanation

The short-term effect is decreased plant available nitrogen because microbial nitrogen immobilization occurs, reducing nitrate and ammonium in the soil. This carbon demand exceeds nitrogen availability. Therefore plant uptake is reduced rather than enhanced photosynthesis that boosts resources.

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