FIGURE 5.

Illustration of the hypothesized biological methane filter in the coastal sediments of the Bothnian Sea. The depth of distinct zones and electron acceptor availability is not to scale. ANME, anaerobic methane‐oxidizing archaea; AOM, anaerobic oxidation of methane; MOB, methane‐oxidizing bacteria. While putative novel methanotrophic Verrucomicrobia were investigated in this study, canonical MOB and ANME sequences were previously reported (Rasigraf et al., 2020) in Bothnian Sea sediments