Description:
Concentration of ammonia monooxygenase subunit A genes from Beta-proteobacteria determined by qPCR in units of 103 copies L-1. "nd" = no data. Limit of detection estimated from volume filtered, DNA extract volume, template volume used per reaction and standard curves is 8 * 103 copies L-1, values <8 * 103 copies L-1 set to 0.0