Summary of metagenomes used in this study.

All metagenomes are publicly available on the MG-RAST server (http://metagenomics.nmpdr.org/) [20]. Number of database hits (BLASTX) are determined using an E-value cut-off of 0.001. A more detailed table is provided in supporting information Table S3. Bold = this study.所有宏基因组（metagenomes）均已公开上传至MG-RAST服务器（http://metagenomics.nmpdr.org/）[20]。数据库比对命中数（BLASTX）的统计采用期望值（E-value）阈值为0.001的筛选标准。详尽完整的数据表格详见补充材料表S3。表格中加粗内容对应本研究成果。