3-factor ANOVA (analysis of variance) results for sediment oxygen consumption (SOC; dark chamber O₂ flux), net primary production (NPP; light chamber O₂ flux) and gross primary production normalised by sediment chl <i>a</i> content (GPP/chl <i>a</i>).

<p>Factors are site (Sd = Sandy, Ms = Muddy-sand), season (Wi = Winter, Su = Summer) and treatment (+AS = <i>Austrovenus</i> addition, –AS = <i>Austrovenus</i> removal). Values in bold are significant at <i>p</i><0.05. Tukey post-hoc tests for significant differences between site, season and treatment are shown at α = 0.05. SOC and GPP/chl <i>a</i> were square root (SQRT) transformed prior to analysis.