Table 1. How the total carbon biomass estimates by phylum from Bar-On et al., 2018 compare to the implied biomass estimates from this study.

All biomass estimates are carbon biomass, and the proportions are of total biomass with respect to the study. The proportion of biomass in this study compared to the Bar-On et al. estimates Bar-On et al., 2018 indicates chordates are overrepresented and arthropods are underrepresented in the present study; the factor that each phylum is overrepresented is given in the eighth column. Total species by phylum estimates are from Reaka-Kudla et al., 1996; Nicol, 1969; Zhang, 2013; Chapman, 2009. The ratio column is the ratio of total biomass implied by the $N_c$ estimates of each species in a phylum to the actual biomass of that phylum.

		Bar-On et al.		Present study
phylum	total species (T)	biomass (B)	prop. biomass	biomass (b)	prop. biomass	num. species (n)	factor overrepresented	prop. total species (f=n/T)	factor (b/f⁢B)
Arthropoda	1.26 × 106	1.20	0.4635	2.80 × 10−4	0.0102	68	0.02	5.41 × 10−5	4.31
Chordata	5.41 × 104	0.87	0.3357	2.67 × 10−2	0.9715	68	2.89	1.26 × 10−3	24.40
Annelida	1.70 × 104	0.20	0.0772	1.23 × 10−5	0.0004	3	0.01	1.76 × 10−4	0.35
Mollusca	9.54 × 104	0.20	0.0772	4.56 × 10–4	0.0166	13	0.21	1.36 × 10−4	16.70
Cnidaria	1.60 × 104	0.10	0.0386	3.07 × 10−5	0.0011	2	0.03	1.25 × 10−4	2.45
Nematoda	2.50 × 104	0.02	0.0077	4.03 × 10−6	0.0001	1	0.02	4.00 × 10−5	5.03