Microbial life in a liquid asphalt desert.

@article{SchulzeMakuch2011MicrobialLI,
  title={Microbial life in a liquid asphalt desert.},
  author={Dirk Schulze‐Makuch and Shirin Haque and Marina Resendes de Sousa Antonio and Denzil Ali and Riad Hosein and Young-Chang Song and Jinshu Yang and Elena Zaikova and Denise Maria Beckles and Edward F. Guinan and Harry J. Lehto and Steven J. Hallam},
  journal={Astrobiology},
  year={2011},
  volume={11 3},
  pages={
          241-58
        }
}
Pitch Lake in Trinidad and Tobago is a natural asphalt reservoir nourished by pitch seepage, a form of petroleum that consists of mostly asphaltines, from the surrounding oil-rich region. During upward seepage, pitch mixes with mud and gases under high pressure, and the lighter portion evaporates or is volatilized, which produces a liquid asphalt residue characterized by low water activity, recalcitrant carbon substrates, and noxious chemical compounds. An active microbial community of archaea… 

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References

SHOWING 1-10 OF 83 REFERENCES
Microbial Diversity in Natural Asphalts of the Rancho La Brea Tar Pits
TLDR
The discovery of life in the tar pits provides an avenue for further studies of the evolution of enzymes and catabolic pathways for bacteria that have been exposed to complex hydrocarbons for millennia, and should have application for industrial microbiology and bioremediation.
Microbiological investigation of methane- and hydrocarbon-discharging mud volcanoes in the Carpathian Mountains, Romania.
TLDR
This survey is the first to report the presence and activity of ANME in a terrestrial environment and the potential of the indigenous microbial community for sulfate reduction, methanogenesis and aerobic methanotrophy is revealed.
Diversity and Abundance of Aerobic and Anaerobic Methane Oxidizers at the Haakon Mosby Mud Volcano, Barents Sea
TLDR
The results further support the hypothesis that high methane availability and different fluid flow regimens at the HMMV provide distinct niches for aerobic and anaerobic methanotrophs.
Methane- and Sulfur-Metabolizing Microbial Communities Dominate the Lost City Hydrothermal Field Ecosystem
TLDR
The finding of a diverse microbial ecosystem supported by the interaction of high-temperature, high-pH fluids resulting from serpentinization reactions in the subsurface provides insight into the biogeochemistry of what may be a pervasive process in ultramafic subseafloor environments.
Methane-Producing Microbial Community in a Coal Bed of the Illinois Basin
TLDR
It is suggested that organic matter is biodegraded to simple molecules, such as H2 and CO2, which fuel methanogenesis and the generation of large coal bed methane reserves in the eastern Illinois Basin.
Isolation and characterization of psychrotrophic bacteria from oil-reservoir water and oil sands
TLDR
Four psychrotrophic strains isolated from Japanese oil-reservoir water and Canadian oil sands exhibited weak degradation ability against catechol, a hydroxylated aromatic hydrocarbon, and tributyrin and are expected to be of potential use in the in situ bioremediation technology of hazardous hydrocarbons and esters under low-temperature conditions.
Crude-oil biodegradation via methanogenesis in subsurface petroleum reservoirs
TLDR
The data imply a common methanogenic biodegradation mechanism in subsurface degraded oil reservoirs, resulting in consistent patterns of hydrocarbon alteration, and the common association of dry gas with severely degraded oils observed worldwide.
Anaerobic hydrocarbon biodegradation in deep subsurface oil reservoirs
TLDR
The isolation of metabolites indicative of anaerobic hydrocarbon degradation from a large fraction of 77 degraded oil samples from both marine and lacustrine sources from around the world, including the volumetrically important Canadian tar sands are reported, suggesting that anaer aerobic degradation is a common process in biodegraded subsurface oil reservoirs.
...
...