Dibiphytanyl ether lipids in nonthermophilic crenarchaeotes

Article Abstract:

Cyclic and acyclic dibiphytanylglycerol tetraether lipids are present in nonthermophilic crenarchaeotes. Microbial biomass from a number of different natural habitats known to harbor large numbers of nonthermophilic crenarchaeotes were collected to further characterize these microorganisms phenotypically. Results indicate that nonthermophilic crenarchaeotes are apparently a major biological source of tetraether lipids in marine planktonic environments.

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Ether lipids of planktonic Archaea in the marine water column

Article Abstract:

Carbon 40-ether-bound lipids has been discovered in the planktons from oxic and anoxic marine water and in marine sediments studied. This finding suggests that Archaea bacteria can be found in seas and oceans and these bacteria could be a good source of lipids. Studies done on plankton fossils suggest further that Archaea may have evolved in marine environments at least 50 million years ago.

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Biogeochemical evidence that thermophilic archaea mediate the anaerobic oxidation of methane

Article Abstract:

The anaerobic oxidation of methane in sediment layers extending up to 17 centimeter deep at hydrothermal vent site suggests the presence of archaea that carryout methane oxidation anaerobically, as revealed by the distribution and isotopic analyses of lipids from sediment cores. Data show that these organisms are active at temperatures greater than 30 C and contain tetraether lipids.

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