title: 18S rDNA of periphyton: NDS experiment method blank 2
design: Clean, blank fritted glass disc substrates were processed alongside NDS experiment samples starting with: DNA was extracted from each disc sample using a modified method of the Qiagen Dneasy PowerSoil Pro kit; samples were shipped to Novogene (USA and China) for PCR amplification, library preparation, sequencing, and bioinformatics clean-up.