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Comparison of depths of O2 penetration into the sediment cores pre- and postincubation under different incubation techniques for all samples collected at both sites. Amendment cores were incubated with He headspace and carbon and nitrogen additions; no-amendment cores were incubated without additions; MIMS cores were incubated with a flowthrough system. **, significant difference within treatment group (α = 0.05; P < 0.001 [ANOVA]). Bars indicate standard deviations (SD).
