SRX5275909 20190123 SRP174962 PRJNA512327 SNADbiofilm under common DO concentration 20 degree SRS4276051 Q2 20190123 AMPLICON METAGENOMIC PCR Illumina MiSeq SRX5275910 20190122 SRP174962 PRJNA512327 SNADbiofilm under high DO concentration 20 degree SRS4276052 Q1 20190122 AMPLICON METAGENOMIC PCR Illumina MiSeq