Sulfur Biogeochemical Cycle of Marine Sediments DOI Open Access
Bo Barker Jørgensen

Geochemical Perspectives, Journal Year: 2021, Volume and Issue: unknown, P. 145 - 307

Published: Oct. 1, 2021

Complex interactions between microbial communities and geochemical processes drive the major element cycles control function of marine sediments as a dynamic reservoir organic matter. Sulfate reduction is globally dominant pathway anaerobic mineralisation main source sulfide. The effective re-oxidation this sulfide at direct or indirect expense oxygen prerequisite for aerobic life on our planet. Although largely hidden beneath oxic sediment surface, sulfur cycle therefore critical Earth’s redox state. This Geochemical Perspectives begins with brief primer description my own scientific journey through nearly fifty years studies geochemistry microbiology. Among objectives these were to quantify identify behind them. Radiotracers in combination chemical analyses have thereby been used extensively laboratory experiments, supported by diverse molecular microbiological methods. following sections discuss sulfate reduction, oxidation disproportionation inorganic intermediates, especially elemental thiosulfate. experimental approaches enable analysis how environmental factors such substrate concentration temperature affect process rates concurrent cryptic cycle. energy chemolithotrophic bacteria, including fascinating big bacteria cable supports their dark CO2 fixation, which produces new biomass. During burial aging sediments, predominant change cascade reactions, rate matter degradation drops continuously over many orders magnitude. pathways age turnover are discussed. In deep methanic zone, only few percent entire remains, provides small boost methane oxidation. stable isotopes provide an additional tool understand diagenetic processes, whereby isotope fractionation open system diagenesis generate differential diffusion flux isotopes. relation carbon seabed contribution methane, paper discusses global budget role different depth regions ocean – from coast sea. published estimates parameters evaluated compared. Finally, looks future perspectives respect gaps current understanding need further studies.

Language: Английский

The biomass distribution on Earth DOI Creative Commons
Yinon M. Bar-On, Rob Phillips, Ron Milo

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2018, Volume and Issue: 115(25), P. 6506 - 6511

Published: May 21, 2018

Significance The composition of the biosphere is a fundamental question in biology, yet global quantitative account biomass each taxon still lacking. We assemble census all kingdoms life. This analysis provides holistic view and allows us to observe broad patterns over taxonomic categories, geographic locations, trophic modes.

Language: Английский

Citations

3035
Bacteria and archaea on Earth and their abundance in biofilms DOI
Hans‐Curt Flemming,

Stefan Wuertz

Nature Reviews Microbiology, Journal Year: 2019, Volume and Issue: 17(4), P. 247 - 260

Published: Feb. 13, 2019

Language: Английский

Citations

1349
The Biogeochemical Sulfur Cycle of Marine Sediments DOI Creative Commons
Bo Barker Jørgensen, Alyssa Findlay, André Pellerin

et al.

Frontiers in Microbiology, Journal Year: 2019, Volume and Issue: 10

Published: April 24, 2019

Microbial dissimilatory sulfate reduction to sulfide is a predominant terminal pathway of organic matter mineralization in the anoxic seabed. Chemical or microbial oxidation produced establishes complex network pathways sulfur cycle, leading intermediate species and partly back sulfate. The intermediates include elemental sulfur, polysulfides, thiosulfate, sulfite, which are all substrates for further oxidation, disproportionation. New microbiological discoveries, such as long-distance electron transfer through oxidizing cable bacteria, add complexity. Isotope exchange reactions play an important role stable isotope geochemistry experimental study transformations using radiotracers. Microbially catalyzed processes reversible whereby back-reaction affects our interpretation radiotracer experiments provides mechanism fractionation. We here review progress current status understanding cycle seabed with respect its ecology, biogeochemistry, geochemistry.

Language: Английский

Citations

583
The biomass and biodiversity of the continental subsurface DOI
Cara Magnabosco, Li‐Hung Lin, Hailiang Dong

et al.

Nature Geoscience, Journal Year: 2018, Volume and Issue: 11(10), P. 707 - 717

Published: Sept. 21, 2018

Language: Английский

Citations

398
Microbial diversity in extreme environments DOI

Wensheng Shu,

Li‐Nan Huang

Nature Reviews Microbiology, Journal Year: 2021, Volume and Issue: 20(4), P. 219 - 235

Published: Nov. 9, 2021

Language: Английский

Citations

359
Origin, dynamics, and implications of extracellular DNA pools in marine sediments DOI Creative Commons
Andrea Torti, Mark A. Lever, Bo Barker Jørgensen

et al.

Marine Genomics, Journal Year: 2015, Volume and Issue: 24, P. 185 - 196

Published: Dec. 1, 2015

In marine sediments, DNA occurs both inside and outside living organisms. not enclosed in cells may account for the largest fraction of total DNA, include molecules locked within dead cells, organic inorganic aggregates, adsorbed onto mineral matrices, viral DNA. This comprises genetic material released situ from sediment microbial communities, as well pelagic terrestrial origin deposited to seafloor. undermines assumption a direct link between overall pool local, currently assemblages, terms cell abundance diversity. At same time, extracellular provide an integrated view biodiversity ecological processes occurring on land, water columns, sediments themselves, thereby acting archive information which can be used reconstruct past changes source environments. this review, we identify discuss pools with special focus its origin, dynamics, methodological implications. Achievements deciphering held each are presented along still-standing challenges major gaps current knowledge.

Language: Английский

Citations

312
Global diversity of microbial communities in marine sediment DOI Creative Commons

Tatsuhiko Hoshino,

Hideyuki Doi, Go‐Ichiro Uramoto

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2020, Volume and Issue: 117(44), P. 27587 - 27597

Published: Oct. 19, 2020

Significance Marine sediment covers 70% of Earth’s surface and harbors as much biomass seawater. However, the global taxonomic diversity marine sedimentary communities, spatial distribution that remain unclear. We investigated microbial composition from 40 globally distributed sampling locations, spanning depths 0.1 to 678 m. Statistical analysis reveals oxygen presence or absence organic carbon concentration are key environmental factors for defining communities. Global richness predicted by species–area relationship models is 7.85 × 10 3 6.10 5 Archaea 3.28 4 2.46 6 Bacteria amplicon sequence variants, which comparable in seawater topsoil.

Language: Английский

Citations

289
Expansive microbial metabolic versatility and biodiversity in dynamic Guaymas Basin hydrothermal sediments DOI Creative Commons
Nina Dombrowski, Andreas Teske, Brett J. Baker

et al.

Nature Communications, Journal Year: 2018, Volume and Issue: 9(1)

Published: Nov. 21, 2018

Microbes in Guaymas Basin (Gulf of California) hydrothermal sediments thrive on hydrocarbons and sulfur experience steep, fluctuating temperature chemical gradients. The functional capacities communities inhabiting this dynamic habitat are largely unknown. Here, we reconstructed 551 genomes from hydrothermally influenced, nearby cold belonging to 56 phyla (40 uncultured). These comprise 22 unique lineages, including five new candidate phyla. In contrast findings hydrocarbon seeps, hydrothermal-associated more diverse archaea dominate over bacteria. Genome-based metabolic inferences provide first insights into the ecological niches these uncultured microbes, methane cycling Crenarchaeota alkane utilization ANME-1. shaped by a high biodiversity, partitioning among nitrogen pathways redundancy core carbon-processing pathways. select for distinctive microbial that stand out expansive open up physiological perspectives ecosystem function.

Language: Английский

Citations

238
The fate of organic carbon in marine sediments - New insights from recent data and analysis DOI
Douglas E. LaRowe, Sandra Arndt, James A. Bradley

et al.

Earth-Science Reviews, Journal Year: 2020, Volume and Issue: 204, P. 103146 - 103146

Published: Feb. 29, 2020

Language: Английский

Citations

223
Microbial community assembly and evolution in subseafloor sediment DOI Open Access

Piotr Starnawski,

Thomas Bataillon, Thijs J. G. Ettema

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2017, Volume and Issue: 114(11), P. 2940 - 2945

Published: Feb. 27, 2017

Significance Our study shows that deep subseafloor sediments are populated by descendants of rare members surface sediment microbial communities become predominant during burial over thousands years. We provide estimates mutation rates and strength purifying selection in a set taxonomically diverse populations marine show their genetic diversification is minimal burial. data suggest the ability microbes to subsist energy-deprived biosphere not acquired but these were already capable living this unique environment. These findings represent significant step toward understanding bounds for life its connection world.

Language: Английский

Citations

221