CORRIGENDUM

In the paper by Subke et al. Trends and methodological impacts in soil CO₂ efflux partitioning: a meta-analytical review, 12, 921–943, some values reported in Table 1 are incorrect. All R_H/R_S ratios reported from Rodeghiero & Cescatti (2006) are in fact R_A/R_S ratios, so that the correct values should read as printed here (Table 1).

Table 1. 

Biome	Ecosystem	Method	Age	Step	RS	RH/RS	Reference
Temperate	Coniferous forest	r reg	M	a	670	0.84	Rodeghiero & Cescatti (2006)
		r reg	M	a	648	0.60	Rodeghiero & Cescatti (2006)
		r reg	M	a	576	0.48	Rodeghiero & Cescatti (2006)
		r reg	M	a	644	0.74	Rodeghiero & Cescatti (2006)
		r reg	M	a	773	0.53	Rodeghiero & Cescatti (2006)
		r reg	M	a	1015	0.42	Rodeghiero & Cescatti (2006)
	Deciduous forest	r reg	M	a	1079	0.49	Rodeghiero & Cescatti (2006)

This change affects the mean flux ratios calculated for the root regression technique to an extent that the data no longer support a consistent underestimation compared with other techniques, as we state in the original article (p. 937 and Table 4). The updated Fig. 5 of the original paper is reproduced here. However, the general discussion of assumptions underlying this technique remains valid, and no other conclusion drawn from the analysis is affected by this error. We apologize for any confusion this may have caused.

Figure 5.  Weighted means of total soil CO₂ efflux (R_S) and heterotrophic flux contributions (R_H/R_S) for studies reporting annual fluxes, with the number of studies per technique indicated in the legend. Means are weighted by reciprocal of the variance of ln(R_H/R_S), and error bars indicate 95% confidence intervals. The regression line is calculated for all ecosystem types, and includes all techniques.