archaea community of 50 m seawater
After amplification of the archaeal 16S rRNA gene, amplicons were mixed in equidensity ratios and then purified with GeneJET Gel Extraction Kit. Sequencing libraries were generated using Illumina TruSeq DNA PCR-Free Library Preparation Kit and index codes were added. The library was sequenced on the Illumina HiSeq2500 platform.