Abstract:

These data investigated the effects of environmental factors on the production of methane in marine sediment, by quantifying and comparing the methanogenesis rates from different 14C-labeled substrates in nearshore and offshore seep sediments of northern Gulf of Mexico. The dataset reports geochemistry of the study sites, the turnover rates and methanogenesis rates from bicarbonate, acetate, methanol and methylamine under a series of experimental conditions. Experimental treatments included changes to methane concentration, pressure, temperature. Incubations were also performed in the presence of inhibitory compounds. Site geochemical data used to calculate rate measurements from sites GC600 and GC767 are associated with GRIIDC dataset R4.x268.000:0003.

Suggested Citation:

Samantha Joye. 2017. Methanogenesis rate measurements from experimental incubations testing the impact of pressure, methane concentration and temperature on methane cycling. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N76W986N

Publications:

Zhuang, G.-C., Montgomery, A., Sibert, R. J., Rogener, M.-K., Samarkin, V. A., & Joye, S. B. (2018). Effects of pressure, methane concentration, sulfate reduction activity, and temperature on methane production in surface sediments of the Gulf of Mexico. Limnology and Oceanography. doi:10.1002/lno.10925

Purpose:

The purpose of these data is to quantify the effects of pressure, methane concentration and temperature on the production of methane in marine sediments.

Data Parameters and Units:

Depth (cm); Sulfate (mmol/L); Methane (μmol/L); DIC (Dissolved inorganic carbon, mmol/L); Acetate (μmol/L); Methanol (μmol/L); DIC turnover rate (d-1); DIC metanogenesis rate (pmol cm-3 d-1); Acetate turnover rate (d-1); Acetate metanogenesis rate (pmol cm-3 d-1); Methanol turnover rate (d-1); Methanol metanogenesis rate (pmol cm-3 d-1); Methylamine turnover rate (d-1); Molybdate (Sulfate reduction inhibitor); BES (bromoethanesulfonate, methanogenesis inhibitor); BD (below detection); All rate measurements are represented as the mean of triplicate incubations Sediments collected for experiments described in this dataset were collected at the following sites: GC600 (27°21.914' N, 90°33.815' W) GC767 (27°12.56' N, 91°00.82' W) C6B (28°50.586' N, 90°23.718' W)

Individual Files: