marginally significantP = 0.055
The amounts of 13 C detected did not differ significantly between earlier and later sampling times ( F 1,11 = 1.222, P = 0.293) but did differ in a marginally significant way by necromass type ( F 1,11 = 4.608, P = 0.055), with greater but also more variable amounts of 13 C detected in soils under low melanin necromass.