Geosphere-Biosphere Interactions in Bio-Activity Volcanic Lakes: Evidences from Hule and Rìo Cuarto (Costa Rica)
Table 3
Chemical composition (µmol L−1) and total pressure (pTOT; in atm) of dissolved gases (CO2, N2, CH4, Ar, O2, Ne, H2 and He) and δ13C-CO2 (expressed as ‰ V-PDB), δ13C-CH4 (expressed as ‰ V-PDB), δD-CH4 (expressed as ‰ V-SMOW) and R/Ra values of gas samples collected.