Abstract
In this work, data on methanogenic Archaea communities in sediment from the coastal area of Puck Bay were investigated. Sediments were collected along the Hel Peninsula from areas characterized by the occurrence of gas bubbles. Based on the analysis of molecular markers, the presence of a specific methanogenic Archaea gene was detected at all stations. Further research involved the cloning and sequencing of methanogenic DNA. Based on the comparison of obtained genetic sequences with existing genetic databases, it was confirmed that all of the nucleotide sequences belonged to the domain Archaea. Furthermore, in the investigated sediment certain sequences had certain similarities to the sequences of organisms from the families Methanosarcinaceae, Methanospirillaceae and Methanocorpusculaceae.