TABLE 2.

Methane and sulfide concentrations in the water collected at the bottom and top of three mussel beds and numbers of individuals and gill filament sections examined at each sampling site by fluorescence in situ hybridization

Mussel bedConcn (μM) ofa:No. of specimensTotal no. of sections
CH4 (bottom)CH4 (top)H2S (bottom)H2S (top)
M1 (center)0.71.6<1<1210
M2 (center)33.723.2<1<125
M3 (center)23.712.5<1<124
M3 (periphery)11.86.3<1<1224
  • a The detection limit for methane was 50 nM, and the detection limit for sulfide was 1 μM.