Previously we presented Swarm v1. a novel and open source amplicon clustering program that produced fine-scale molecular operational taxonomic units (OTUs). free of arbitrary global clustering thresholds and input-order dependency. Swarm v1 worked with an initial phase that used iterative single-linkage with a local clustering threshold (d). https://www.roneverhart.com/HP-EliteDisplay-S14-14-FHD-LED-Monitor-1080p-Portable-Display-60Hz-5ms-16-9-200-cd-m-700-1-USB-C-3HX46A8/