Figure 3
From: Comparative metagenomics of hydrocarbon and methane seeps of the Gulf of Mexico
Ternary plot of genes identified in PC12 (non seep, brown corner), PC10 (Site 2 methane seep, yellow corner) and PC5 (Site 1 oil seep, green corner) sediment cores. Each dot represents a single gene. 1795 genes were represented, corresponding to the genes with the most differential representation between the sediment cores and together explaining 80% of the dissimilarity between metagenomes after normalization. The colors of the dots correspond to specific metabolic pathways. The closer the symbol is to the node of the triplot, the more predominant the gene is in that particular sediment site compared to the others. Genes in the center are shared among all three sites. Owing to the large number of shared genes between studied sites only genes overrepresented in one sample (more than 50% of all the genes found in 3 cores are found in one specific core) were investigated. In addition, specific pathways were also analyzed. A list of identified genes with a description and KEGG orthology is provided in Supplementary Table 3.
