nearly significantP = 0.074
The increase in bioavailable nutrients was however more pronounced in the ambient than the heated plots, which was reflected in a nearly significant interaction between warming and fertilization ( F 1, 32 = 3.42, P = 0.074 and F 1, 32 = 3.62, P = 0.066 for NH 4 + and NO 3 − , respectively; Fig. 2 ).