SAMN42043606
External Id
Boston University
INSDC center name
2024-06-25T00:00:00Z
INSDC first public
2024-06-26T11:40:21.587Z
INSDC last update
SRS21758244
INSDC secondary accession
live
INSDC status
Metagenome or environmental
NCBI submission model
Metagenome.environmental.1.0
NCBI submission package
SRS21758244
SRA accession
2018-10
collection_date
Methane is a potent greenhouse gas that enters the marine system in large quantities at seafloor methane seeps. At a newly discovered seep site off the coast of Point Dume, CA, meter-scale carbonate chimneys host microbial communities that exhibit the highest methane-oxidizing potential recorded to date. Here, we provide a detailed assessment of chimney geobiology through correlative mineralogical, geochemical, and microbiological studies of seven chimney samples in order to clarify the longevity and heterogeneity of these highly productive systems. U-Th dating indicated that a methane-driven carbonate precipitating system at Point Dume has existed for 20 kyr, while mm scale variations in carbon and calcium isotopic values, elemental abundances, and carbonate polymorphs revealed changes in carbon source, precipitation rates, and diagenetic processes throughout the chimneys' lifespan. Microbial community analyses revealed diverse modern communities with prominent anaerobic methanotrophs, sulfate reducing bacteria, and Anaerolineaceae; communities were more similar within a given chimney wall transect than in similar horizons of distinct structures. The chimneys represent long lived repositories of methane-oxidizing communities and a provide a window into how carbon can be transformed, sequestered, and altered over millennia at the Point Dume methane seep.
description
USA: Point Dume, CA
geo_loc_name
Deep Sea Chimney
isolation_source
33.941067 N 118.844731 W
lat_lon
marine sediment metagenome
http://purl.obolibrary.org/obo/NCBITaxon_412755
organism
Metagenome or environmental sample from marine sediment metagenome
title