TABLE 2.

Effects of ferrihydrite amendments on mineralization rates at station I

Process	Treatment	Mineralization rate (nmol cm−3 day−1) at deptha:
		0.5–1.5 cm	8–10 cm
ΣCO2 production	Unamended	179 ± 20	14 ± 49
	+ Ferrihydrite	200 ± 67	71 ± 24
NH4+ accumulation	Unamended	24 ± 2	−0.3 ± 0.2
	+ Ferrihydrite	26 ± 4	−0.2 ± 0.6
Sulfate reduction	Unamended	97 ± 23	5.2 ± 0.9
	+ Ferrihydrite	109 ± 42	3.4 ± 0.3

^aValues are means ± standard errors.