Previous studies on deep modern benthic foraminifera in the Mediterranean Sea are not abundant and generally are focused at the fossilizing polythalamous component of the foraminiferal assemblages.We present prelimina...Previous studies on deep modern benthic foraminifera in the Mediterranean Sea are not abundant and generally are focused at the fossilizing polythalamous component of the foraminiferal assemblages.We present preliminary results of living(Rose Bengal stained)benthic foraminiferal faunas in bathyal and abyssal sediments.Benthic foraminiferal density, species composition and biomass are determined at 10 sites across a transect from the展开更多
The Arctic,an essential ecosystem on Earth,is subject to pronounced anthropogenic pressures,most notable being the climate change and risks of crude oil pollution.As crucial elements of Arctic environments,benthic mic...The Arctic,an essential ecosystem on Earth,is subject to pronounced anthropogenic pressures,most notable being the climate change and risks of crude oil pollution.As crucial elements of Arctic environments,benthic microbiomes are involved in climate-relevant biogeochemical cycles and hold the potential to remediate upcoming contamination.Yet,the Arctic benthic microbiomes are among the least explored biomes on the planet.Here we combined geochemical analyses,incubation experiments,and microbial community profiling to detail the biogeography and biodegradation potential of Arctic sedimentary microbiomes in the northern Barents Sea.The results revealed a predominance of bacterial and archaea phyla typically found in the deep marine biosphere,such as Chloroflexi,Atribacteria,and Bathyarcheaota.The topmost benthic communities were spatially structured by sedimentary organic carbon,lacking a clear distinction among geographic regions.With increasing sediment depth,the community structure exhibited stratigraphic variability that could be correlated to redox geochemistry of sediments.The benthic microbiomes harbored multiple taxa capable of oxidizing hydrocarbons using aerobic and anaerobic pathways.Incubation of surface sediments with crude oil led to proliferation of several genera from the so-called rare biosphere.These include Alkalimarinus and Halioglobus,previously unrecognized as hydrocarbon-degrading genera,both harboring the full genetic potential for aerobic alkane oxidation.These findings increase our understanding of the taxonomic inventory and functional potential of unstudied benthic microbiomes in the Arctic.展开更多
文摘Previous studies on deep modern benthic foraminifera in the Mediterranean Sea are not abundant and generally are focused at the fossilizing polythalamous component of the foraminiferal assemblages.We present preliminary results of living(Rose Bengal stained)benthic foraminiferal faunas in bathyal and abyssal sediments.Benthic foraminiferal density, species composition and biomass are determined at 10 sites across a transect from the
基金the Bundesministerium für Bildung und Forschung(BMBF)-funded deNBI cloud within German Network for Bioinformatics Infrastructure(de.NBI)(Nos.031A532B,031A533A,031A533B,031A534A,031A535A,031A537A,031A537B,031A537C,031A537D,031A538A)for providing computational resources.Florin Musat was funded by the Helmholtz Association of German Research Centres Grant ERC-RA-0020+2 种基金the Novo Nordisk Foundation through an NNF Young Investigator Award,Grant NNF22OC0071609 ReFuel(grants to F.M.).Song-Can Chen is supported by Marie Skłodowska-Curie Actions 2021(postdoctoral fellowship 101059607 to S.C.C.).All sequencing data generated in this study have been deposited in the Sequence Read Archive under BioProject PRJNA1017987(SAMN37419328-SAMN374193).
文摘The Arctic,an essential ecosystem on Earth,is subject to pronounced anthropogenic pressures,most notable being the climate change and risks of crude oil pollution.As crucial elements of Arctic environments,benthic microbiomes are involved in climate-relevant biogeochemical cycles and hold the potential to remediate upcoming contamination.Yet,the Arctic benthic microbiomes are among the least explored biomes on the planet.Here we combined geochemical analyses,incubation experiments,and microbial community profiling to detail the biogeography and biodegradation potential of Arctic sedimentary microbiomes in the northern Barents Sea.The results revealed a predominance of bacterial and archaea phyla typically found in the deep marine biosphere,such as Chloroflexi,Atribacteria,and Bathyarcheaota.The topmost benthic communities were spatially structured by sedimentary organic carbon,lacking a clear distinction among geographic regions.With increasing sediment depth,the community structure exhibited stratigraphic variability that could be correlated to redox geochemistry of sediments.The benthic microbiomes harbored multiple taxa capable of oxidizing hydrocarbons using aerobic and anaerobic pathways.Incubation of surface sediments with crude oil led to proliferation of several genera from the so-called rare biosphere.These include Alkalimarinus and Halioglobus,previously unrecognized as hydrocarbon-degrading genera,both harboring the full genetic potential for aerobic alkane oxidation.These findings increase our understanding of the taxonomic inventory and functional potential of unstudied benthic microbiomes in the Arctic.
