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Which consequence results when excessive phosphorus limits nitrogen mineralization in grassland soils?

A)Reduced plant species richness develops
B)Increased decomposition rates accelerate
C)Enhanced mycorrhizal fungi activity spikes
D)Decreased denitrifying bacteria dominate

💡 Explanation

Reduced phosphorus limits microbial activity responsible for nitrogen mineralization, because the microbes cannot create necessary enzymes through immobilization. Therefore, nitrogen availability decreases, reducing plant diversity, rather than boosting decomposition or fungal activity otherwise stimulated by available inorganic plant nutrients.

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