Ecological niche Site mg/ml 2Amplicon number Phylum 1 Salt works drainage holes 1Rio Lagartos 52 1,2,*3 Firmicutes 42%. 2 Lagoon 1Rio Lagartos 61.7 N.D. N.D. 3 Lagoon 1Celestún 63 4-5 N.D. 4 Sediment rich in birds feces 1Celestún 136.7 6-7 N.D. 5 Papaya waste 1Yucatán 191.8 *8, 9, 10 Acidobacteria 9%. 6 Soil to elaborate compost from henequen residues 1Hunucmá 148.5 *11,12, *13,14,15 Chlorobi 15%, Proteobacteria 45%. 7 Forest with petrified waterfalls 2Hierve el agua 128.1 16, 17,*18 Proteobacteria 41%. 8 Geisers 3Los Azufres 196 *119-22 Aquificae 17%, Lentisphaerae 1%. Firmicutes 40%,Proteobacteria 56% 9 Cattle farm 1Yucatán 189 *123-25 Actinobacteria 8%, Proteobacteria52%. Firmicutes 37% 1Yucatán, 2Oaxaca 3Michoacán states. *-1*Sequences reported to GenBank. N.D. Not Determined. 2See Figure 1.

Table 1: Metagenome samples settlements, yields and taxonomical determinations.