Minimum abundance thresholds

Hi, sorry for the multiple issues today. I was interested on your comment in the methods of Emu paper: "The default threshold for Emu is an abundance equivalent to 1 read for samples with under 1,000 reads and 10 reads for larger samples; however, the user can modify this parameter." I was wondering what parameter you were referring to? My understanding is the '-min-abundance' argument will only create a different output file with all identified species above that abundance threshold rather than altering the minimum abundance threshold that Emu allows species to be included? It would be great to know how to alter this minimum threshold with an interest in potentially identifying lower abundance species in environmental samples. Many thanks!