Abstract:

This dataset includes sedimentary porewater profiles of sulfate and methane concentrations, 13C of methane and carbon dioxide, and chloride concentrations) of a sediment gravity core from the upper continental slope of the northwestern Gulf of Mexico (MC118) in 2008, 15 km from the spill site. Data were collected by pore-water extraction at different sediment depths down the core and analysis by ion chromatography, gas chromatography, and isotope ratio spectrometry.

Suggested Citation:

Lapham, Laura. 2016. R/V Pelican Water and Sediment Chemistry with Associated Microbial Analysis, Gulf of Mexico, April 22 - April 28, 2008. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7TT4P0X

Publications:

Underwood, S., Lapham, L., Teske, A., & Lloyd, K. G. (2015). Microbial community structure and methane-cycling activity of subsurface sediments at Mississippi Canyon 118 before the Deepwater Horizon disaster. Deep Sea Research Part II: Topical Studies in Oceanography. doi:10.1016/j.dsr2.2015.01.011

Purpose:

To compare 16S rRNA and functional gene sequences deriving from DNA and RNA with geochemical profiles (sulfate and methane concentrations, 13C of methane and carbon dioxide, and chloride concentrations) of a sediment gravity core from the upper continental slope of the northwestern Gulf of Mexico (MC118) in 2008, 15 km from the spill site.

Data Parameters and Units:

cruise; date (MM/DD/YYYY); coring location (latitude, longitude); water depth (m); depth (cm below surface); sulfate (SO4, mM); d13C-CH4 (ppt); d13C-DIC (ppt); methane (CH4, uM); chloride (mM). DNA sequences associated with this project were deposited with NCBI Genbank under accession numbers KP814566-KP814679.

Individual Files: