Prokaryotic Populations and Activities in an Interbedded Coal Deposit, Including a Previously Deeply Buried Section (1.6–2.3 km) Above ∼ 150 Ma Basement Rock

Fry, John C.; Horsfield, Brian; Sykes, Richard; Cragg, Barry A.; Heywood, Chloe; Kim, Gwang Tae; Mangelsdorf, Kai; Mildenhall, Dallas C.; Rinna, Joachim; Vieth, Andrea; Zink, Klaus-Gerhard; Sass, Henrik; Weightman, Andrew J.; Parkes, Ronald John

doi:10.1080/01490450902724832

Cited by 95 publications

(75 citation statements)

References 76 publications

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“…Cell abundances scatter by up to 1.5 orders of magnitude between the different microlayers. The differences that Fry et al (2009) reported for cell abundances around interbedded lignite and sand layers in a drill core from New Zealand are somewhat lower, not exceeding one order of magnitude. Also, Coolen et al (2002) only reported comparatively small changes in cell abundance between inside and outside of Mediterranean sapropels.…”

Section: Discussionmentioning

confidence: 90%

“…Although the sample material was mechanically deformed, we consider this to have little to no effect on cell distribution, as most sedimentary microbes are not free living in the pore space, but attached to sediment particles (Fenchel 2008;Fry 1988;Kallmeyer 2011), their motility is much lower than that of planktonic organisms (Fenchel 2008;Kallmeyer 2011).…”

Section: Discussionmentioning

confidence: 99%

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Microbial abundance in lacustrine sediments: a case study from Lake Van, Turkey

Kallmeyer

Grewe

Glombitza

et al. 2015

Int J Earth Sci (Geol Rundsch)

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abundance, and some non-laminated horizons show large variability on the millimetre scale as well. The reasons for such contrasting observations remain elusive, but indicate that heterogeneity of microbial abundance in subsurface sediments has not been taken into account sufficiently. These findings have implications not just for microbiological studies but for geochemistry as well, as the large differences in microbial abundance clearly show that there are distinct microhabitats that deviate considerably from the surrounding layers.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Microbial abundance in lacustrine sediments: a case study from Lake Van, Turkey

Kallmeyer

Grewe

Glombitza

et al. 2015

Int J Earth Sci (Geol Rundsch)

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“…Microbio-logical and geochemical studies of terrestrial coal deposits and subsurface aquifers suggest that microorganisms play important ecological roles in coal diagenesis, resulting in substantial quantities of CBM as a terminal product (Brown et al, 1999;Detmers et al, 2001;Fry et al, 2009;Krüger et al, 2008;Shimizu et al, 2007;Strapoc et al, 2008) (Fig. F3).…”

Section: Coal Diagenesis: Microbiological Significance For Biogeochemmentioning

confidence: 99%

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2010

IODP Scientific Prospectus

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“…The deep biosphere harbors a considerable portion of the Earth biomass with microbial cell numbers roughly equal to those in surface environments (Fry et al, 2009;Schrenk et al, 2010;Kallmeyer et al, 2012). Because of the extremely low flux of nutrients and energy, this is also the environment with the slowest growth rates and the longest estimated division times for prokaryotic cells-perhaps up to 1000 years per generation (Jørgensen, 2011;Morono et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The conjecture is that new organisms have not colonized such oil reservoirs after their subsequent uplift and cooling, and that is why no oil biodegradation is presently observed. In the alternative 'colonization' hypothesis, subsurface microorganisms populate the oil reservoir after their formation (Stetter and Huber, 1999;Fry et al, 2009). The microbiomes of some reservoirs may have assembled through a combination of these mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments

et al. 2014

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Oil reservoirs represent a nutrient-rich ecological niche of the deep biosphere. Although most oil reservoirs are occupied by microbial populations, when and how the microbes colonized these environments remains unanswered. To address this question, we compared 11 genomes of Thermotoga maritima-like hyperthermophilic bacteria from two environment types: subsurface oil reservoirs in the North Sea and Japan, and marine sites located in the Kuril Islands, Italy and the Azores. We complemented our genomes with Thermotoga DNA from publicly available subsurface metagenomes from North America and Australia. Our analysis revealed complex non-bifurcating evolutionary history of the isolates' genomes, suggesting high amounts of gene flow across all sampled locations, a conjecture supported by numerous recombination events. Genomes from the same type of environment tend to be more similar, and have exchanged more genes with each other than with geographically close isolates from different types of environments. Hence, Thermotoga populations of oil reservoirs do not appear isolated, a requirement of the 'burial and isolation' hypothesis, under which reservoir bacteria are descendants of the isolated communities buried with sediments that over time became oil reservoirs. Instead, our analysis supports a more complex view, where bacteria from subsurface and marine populations have been continuously migrating into the oil reservoirs and influencing their genetic composition. The Thermotoga spp. in the oil reservoirs in the North Sea and Japan probably entered the reservoirs shortly after they were formed. An Australian oil reservoir, on the other hand, was likely colonized very recently, perhaps during human reservoir development.

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Prokaryotic Populations and Activities in an Interbedded Coal Deposit, Including a Previously Deeply Buried Section (1.6–2.3 km) Above ∼ 150 Ma Basement Rock

Cited by 95 publications

References 76 publications

Microbial abundance in lacustrine sediments: a case study from Lake Van, Turkey

Microbial abundance in lacustrine sediments: a case study from Lake Van, Turkey

Untitled

Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments

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