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← Nature & AnimalsWhich outcome affects grassland nitrogen availability when bison grazing decreases?
A)Reduced nitrogen mineralization by decomposers✓
B)Increased ammonium volatilization into atmosphere
C)Enhanced nitrate leaching into deep soil
D)Decreased denitrification due anoxic soil
💡 Explanation
Decreased bison grazing leads to less dung and urine inputs; this reduces available organic matter, hence less nitrogen mineralization by the nitrogen cycle’s decomposers because the bison stimulate it, therefore lowered available nitrogen, rather than increased volatilization since dung is lower, hence ammonia is unused.
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