Samples were taken to obtain Archaea biofilm aggregates from groundwater of the Mühlbach sulfur spring in Isling near Regensburg, Bavaria. The aggregates originate from a sulfur spring aquifer of 35 m of depth. The picture shows biofilm aggregates collected in a sampling vial. They consist up to 95 % of Altiarchaeota.
The first long-read metagenomes were created from both filtered samples from Sippenau Moor and biofilm samples from Mühlbach sulfur spring using Nanopore sequencing.