Results 31 to 40 of about 1,271,647 (216)

Contrasting bacterial and archaeal distributions reflecting different geochemical processes in a sediment core from the Pearl River Estuary

open access: yesAMB Express, 2020
Microbial community structure and metabolic activities have profound impacts on biogeochemical processes in marine sediments. Functional bacteria such as nitrate- and sulfate-reducing bacteria respond to redox gradients by coupling specific reactions ...
Wenxiu Wang   +6 more
doaj   +1 more source

Enhanced production of highly methylated brGDGTs linked to anaerobic bacteria from sediments of the Mariana Trench

open access: yesFrontiers in Marine Science, 2023
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial membrane lipids that are widely used in terrestrial paleoclimatic reconstructions. Recent studies have reported that brGDGTs can also be produced by marine bacteria.
Zhiyu Zeng   +13 more
doaj   +1 more source

Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds

open access: yesNature Communications, 2021
Archaea in marine sediment control the transfer of methane to the ocean, but microbial dynamics in these environments are poorly understood. Here the authors investigate marine sediments in the high Arctic, showing how methane influx quickly increases ...
Scott A. Klasek   +7 more
doaj   +1 more source

A Novel Approach to Characterize the Lipidome of Marine Archaeon Nitrosopumilus maritimus by Ion Mobility Mass Spectrometry

open access: yesFrontiers in Microbiology, 2021
Archaea are differentiated from the other two domains of life by their biomolecular characteristics. One such characteristic is the unique structure and composition of their lipids.
Kai P. Law   +9 more
doaj   +1 more source

Global Warming and Mass Extinctions Associated With Large Igneous Province Volcanism

open access: yesGeophysical Monograph Series, Page 83-102., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
David P. G. Bond, Yadong Sun
wiley  

+1 more source

Lipidomic diversity and proxy implications of archaea from cold seep sediments of the South China Sea

open access: yesFrontiers in Microbiology, 2023
Cold seeps on the continental margins are characterized by intense microbial activities that consume a large portion of methane by anaerobic methanotrophic archaea (ANME) through anaerobic oxidation of methane (AOM).
Tingting Zhang   +21 more
doaj   +1 more source

Selenocysteine, pyrrolysine and the unique energy metabolism of methanogenic archaea [PDF]

open access: yes, 2010
Methanogenic archaea are a group of strictly anaerobic microorganisms characterized by their strict dependence on the process of methanogenesis for energy conservation.
Rother, Michael   +3 more
core   +1 more source

Community dynamics of archaea in an estuarine river water column and implications for archaeal biogeochemistry

open access: yes, 2022
Shah Walter, SunitaIn the past three decades, it has been established that archaea play important biogeochemical roles in the marine water column and sediments, but there remains a gap in knowledge about the phenology of these marine planktic archaea ...
Guider, Justin
core   +1 more source

The OceanDNA MAG catalog contains over 50,000 prokaryotic genomes originated from various marine environments

open access: yesScientific Data, 2022
Measurement(s) microbial community Technology Type(s) marine metagenome Sample Characteristic - Organism Bacteria • Archaea Sample Characteristic - Environment marine ...
Yosuke Nishimura, Susumu Yoshizawa
doaj   +1 more source

Stratified Communities of Active Archaea in Deep Marine Subsurface Sediments [PDF]

open access: yesApplied and Environmental Microbiology, 2006
ABSTRACT Archaeal 16S rRNA was extracted from samples of deep marine subsurface sediments from Peru Margin site 1227, Ocean Drilling Program leg 201. The amounts of archaeal 16S rRNA in each extract were quantified by serial dilution and reverse transcription (RT)-PCR.
Ketil B, Sørensen, Andreas, Teske
openaire   +3 more sources

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