Because peatlands store vast amounts of carbon and are highly sensitive to climate warming, an accurate estimation of the size of their global carbon pools is essential for understanding the terrestrial carbon cycle and future climate feedback. Yet current estimates remain highly uncertain due to inconsistent definitions, different estimation methods, incomplete field sampling, and limited information on peatland extent and de...

Methylmercury (MeHg) is a potent neurotoxin and bioaccumulates in food webs. Microbial transformation of inorganic mercury (Hg) produces most of the MeHg in the marine environment. The gene pair hgcAB encodes for Hg methylation, a process predominantly attributed to anaerobic bacteria. However, recent studies indicate the formation of methylmercury in low-oxygen zones within marine water columns, although the mechanisms remain...