Fig. 3: | Nature Communications

Fig. 3

From: Methane- and dissolved organic carbon-fueled microbial loop supports a tropical subterranean estuary ecosystem

Fig. 3

Plots of salinity vs. chemical properties from the subterranean estuary. a Methane concentrations. b Dissolved organic carbon (DOC) concentrations. c Dissolved inorganic carbon (DIC) concentrations. d Methane stable carbon isotopic (δ13C) values. e DOC stable carbon isotopic (δ13C) values. f DIC stable carbon isotopic (δ13C) values. The average and total area of conservative mixing lines (CMLs; see Methods for calculations) represent the trend predicted by the mixing model if there was only physical mixing between the meteoric freshwater and saline groundwater end members. Production yields an excess of the constituent relative to the CML average and area, while consumption results in depletion. Symbol of individual data points contain the uncertainty (1 std. dev.) of the measured values