Fig. 4
From: Biogeographic traits of dimethyl sulfide and dimethylsulfoniopropionate cycling in polar oceans
Analyses of inter-sample similarity among the polar and non-polar seawater samples. a Average relative abundance of DMS/DMSP-related genes in different metagenomic sample groups. Bray-Curtis dissimilarities of all (b), polar (c), and Tara (d) metagenomic samples illustrated by PCoA analysis based on the relative abundances of DMS/DMSP-related genes. The total abundance of each metagenomic sample was normalized to 1. The percentages of variation explained by the principal coordinates are indicated on the axes. RDA analyses of sampling sites and protein types of polar samples (e) and Tara samples (f). The ordination plot was constructed using the relative abundance of DMS/DMSP-related proteins. Proteins involved in DMS/DMSP cycling are indicated by black arrows. The percentages of variation are shown on the axes