Data availability
Representative sequences from each OTU recovered from Baltic Sea sediment using Sanger sequencing are stored in NCBI GenBank under accession number MH472563-MH472566. Raw sequencing data from sediment samples in Chesapeake Bay and Kangerlussuaq Fjord are stored in Sequence Read Archive (SRA) database of NCBI under accession number PRJNA835469. List of published datasets re-investigated in this study are included in supplementary materials. Processed data outcomes are available upon request.