Site 4 amplicon sequencing Archaea
16S rRNA gene amplicon sequencing was performed using Illumina MiSeq technology. The primers for archaeal amplification were Arch349F (5-GYGCASCAGKCGMGAAW-3) (Takai & Horikoshi, 2000) and Arch806R (5-GGACTACVSGGGTATCTAAT-3) (Takai & Horikoshi, 2000).