Results 21 to 30 of about 52,993 (223)

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

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

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

Changes in microbial (Bacteria and Archaea) plankton community structure after artificial dispersal in grazer-free microcosms [PDF]

open access: yes, 2017
Microbes are considered to have a global distribution due to their high dispersal capabilities. However, our knowledge of the way geographically distant microbial communities assemble after dispersal in a new environment is limited.
Courties, Claude   +5 more
core   +2 more sources

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

Carbon recycling efficiency and phosphate turnover by marine nitrifying archaea [PDF]

open access: yesScience Advances, 2020
Efficient thaumarchaeal chemoautotrophs recycle ~5% of remineralized C and P and release dissolved organics to the ocean.
Travis B. Meador   +5 more
openaire   +3 more sources

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

Estuarine Nitrifiers: New Players, Patterns and Processes [PDF]

open access: yes, 2010
Ever since the first descriptions of ammonia-oxidizing Bacteria by Winogradsky in the late 1800s, the metabolic capability of aerobic ammonia oxidation has been restricted to a phylogenetically narrow group of bacteria.
Bernhard, Anne E, Bollmann, Annette
core   +2 more sources

Archaeal diversity in deep-sea sediments estimated by means of different Terminal-Restriction Fragment Length Polymorphisms (T-RFLP) protocols [PDF]

open access: yes, 2009
Despite the increasing recognition of the quantitative importance of Archaea in all marine systems, the protocols for a rapid estimate of Archaeal diversity patterns in deep-sea sediments have been only poorly tested yet.
Danovaro, Roberto   +3 more
core   +1 more source

Role for urea in nitrification by polar marine Archaea [PDF]

open access: yesProceedings of the National Academy of Sciences, 2012
Despite the high abundance of Archaea in the global ocean, their metabolism and biogeochemical roles remain largely unresolved. We investigated the population dynamics and metabolic activity ofThaumarchaeotain polar environments, where these microorganisms are particularly abundant and exhibit seasonal growth.Thaumarchaeotawere more abundant in deep ...
Alonso-Sáez, Laura   +14 more
openaire   +4 more sources

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