Lost City vent fields

In comparison to the high-temperature hydrothermal vents, biomass at the Lost City vent field is much lower and the macrofauna are much smaller, typically less than 100 pm. These macrofeuna are predominantly gastropods and polychaetes with 58% of the species being endemic, including nine new species of crustaceans ... 

These redox reactions are abiogenic, whereas the methane sinks are thought to be biogenic, such as the anaerobic oxidation of methane by archaea as observed at the Lost City vent fields (Figure 19.20). Microbial production of methane has also been observed at this site. 

Microbial niches in serpentization-influenced environments at the Lost City hydrothermal vent field. 

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