Fig. 4

Relative abundance and taxonomic affiliation of DMSP cycling genes retrieved from coastal seawater metagenomes. a Relative abundance (RA) of DMSP demethylation (dmdA) and lysis (ddd) genes in seawater metagenomes. b Taxonomic affiliation of key genes involved in DMSP catabolism in seawater samples retrieved from metagenomic data. T0: metagenomes from natural samples; 13C_T: total microbial community from samples incubated with ¹³C-DMSP; 13C_H: metagenomes from ¹³C-heavy fractions; 13C_L: metagenomes from ¹³C-light fractions. T0 values represent the average of three biological replicates. Biological replicates from ¹³C-heavy and ¹³C-light fractions were respectively combined prior to metagenomic sequencing (see the “Methods” section)