Published: Jan. 1, 2025
Language: Английский
The ISME Journal, Journal Year: 2022, Volume and Issue: 16(11), P. 2547 - 2560
Published: Aug. 6, 2022
Cold desert soil microbiomes thrive despite severe moisture and nutrient limitations. In Eastern Antarctic soils, bacterial primary production is supported by trace gas oxidation the light-independent RuBisCO form IE. This study aims to determine if atmospheric chemosynthesis widespread within Antarctic, Arctic Tibetan cold deserts, identify breadth of chemosynthetic taxa further characterize genetic determinants this process. H2 was ubiquitous, far exceeding rates reported fulfill maintenance needs similarly structured edaphic microbiomes. Atmospheric occurred globally, contributing significantly (p < 0.05) carbon fixation in Antarctica high Arctic. Taxonomic functional analyses were performed upon 18 metagenomes, 230 dereplicated medium-to-high-quality derived metagenome-assembled genomes (MAGs) an additional 24,080 publicly available genomes. Hydrogenotrophic carboxydotrophic growth markers widespread. IE discovered co-occur alongside enzymes representative Chloroflexota, Firmicutes, Deinococcota Verrucomicrobiota We a novel group high-affinity [NiFe]-hydrogenases, 1m, through phylogenetics, gene structure analysis homology modeling, reveal substantial diversity (rbcL1E), 1h 1l [NiFe]-hydrogenase groups. conclude that globally-distributed phenomenon, extending throughout with significant implications for global cycle survival environmental reservoirs.
Language: Английский
Citations
34
Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 192, P. 109388 - 109388
Published: March 7, 2024
Language: Английский
Citations
6
The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 824, P. 153746 - 153746
Published: Feb. 9, 2022
Water vapor adsorption (WVA) by soil is a potential contributor to the water cycle in drylands. However, continuous in-situ estimates of WVA are still scarce and understanding its coupling with carbon ecosystem processes remains at an incipient stage. Here we aimed (1) identify periods improve underlying involved temporal patterns using gradient method; (2) characterize between CO2 fluxes, (3) explore effect properties biocrusts ecological succession on fluxes. We assumed that nocturnal uptake increasingly reported those environments could come from enhancing geochemical reactions involving calcite. measured continuously during ca. 2 years relative humidity molar fraction atmosphere, association below- aboveground variables, over succession. estimated fluxes method, cumulative study. Then, used statistical modelling relationships variables. Our main findings hot dry periods, new insights their mechanisms; diel well predicted our models; influxes increasing specific surface area early stages, thus mitigating emissions. During summer drought, as was source, it probably maintained such microbial activity mineral this dryland. suggest drive moments discuss biogeochemical mechanisms potentially involved. Additional research needed monitor separate biotic abiotic components sinks grow climate change.
Language: Английский
Citations
24
The ISME Journal, Journal Year: 2023, Volume and Issue: 17(8), P. 1257 - 1266
Published: May 30, 2023
Language: Английский
Citations
13
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: April 17, 2024
Abstract Microbial activity in drylands tends to be confined rare and short periods of rain. Rapid growth should key the maintenance ecosystem processes such narrow windows, if desiccation rehydration cause widespread cell death due osmotic stress. Here, simulating rain with 2 H O followed by single-cell NanoSIMS, we show that biocrust microbial communities Negev Desert are characterized limited productivity, median replication times 6 19 days restricted number allowing growth. Genome-resolved metatranscriptomics reveals nearly all populations resuscitate within minutes after simulated rain, independent taxonomy, invest their into repair energy generation. Together, our data reveal a community makes optimal use phases fast universal resuscitation enabling functions. We conclude desert highly adapted surviving rapid changes soil moisture solute concentrations, resulting high persistence balances productivity.
Language: Английский
Citations
5
PNAS Nexus, Journal Year: 2024, Volume and Issue: 3(4)
Published: March 28, 2024
Desert environments constitute one of the largest and yet most fragile ecosystems on Earth. Under absence regular precipitation, microorganisms are main ecological component mediating nutrient fluxes by using soil components, like minerals salts, atmospheric gases as a source for energy water. While previous studies microbial ecology desert have focused surface environments, little is known about life in deeper sediment layers. Our study extending limited knowledge communities within subsurface hyperarid core Atacama Desert. By employing intracellular DNA extraction subsequent 16S rRNA sequencing samples collected from pit Yungay region Desert, we unveiled potentially viable community residing at depths down to 4.20 m. In upper 80 cm playa sediments, were dominated Firmicutes taxa showing depth-related decrease biomass correlating with increasing amounts soluble salts. High salt concentrations possibly causing colonization cease lower part sediments between 200 depth. underlying alluvial fan deposits, reemerge, due gypsum providing an alternative water source. The discovery this reshaping our understanding soils, emphasizing need consider future explorations arid ecosystems.
Language: Английский
Citations
5
Trends in Microbiology, Journal Year: 2021, Volume and Issue: 30(4), P. 330 - 337
Published: Aug. 28, 2021
Language: Английский
Citations
32
Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 425, P. 127973 - 127973
Published: Dec. 1, 2021
Language: Английский
Citations
30
Microbiome, Journal Year: 2021, Volume and Issue: 9(1)
Published: Nov. 26, 2021
Abstract Background The hyperarid core of the Atacama Desert is an extremely harsh environment thought to be colonized by only a few heterotrophic bacterial species. Current concepts for understanding this extreme ecosystem are mainly based on diversity these species, yet substantial area topsoil covered expansive boulder accumulations, whose underlying microbiomes have not been investigated so far. With hypothesis that sheltered soils harbor uniquely adapted microbiomes, we compared metagenomes and geochemistry between below beside boulders across three distantly located accumulations in core. Results Genome-resolved metagenomics eleven samples revealed substantially different microbial communities boulders, despite presence shared Archaea were found significantly higher relative abundance all within distances up 205 km. These key taxa belong novel genus ammonia-oxidizing Thaumarchaeota , Candidatus Nitrosodeserticola. We resolved eight mid-to-high quality genomes used comparative genomics analyze its pangenome site-specific adaptations. Ca. Nitrosodeserticola contain genes ammonia oxidation, 3-hydroxypropionate/4-hydroxybutyrate carbon fixation pathway, acetate utilization indicating chemolithoautotrophic mixotrophic lifestyle. They also possess capacity tolerating environmental conditions as highlighted against oxidative stress DNA damage. Site-specific adaptations included additional heavy metal transporters, multiple types ATP synthases, divergent aquaporins. Conclusion provide first genomic characterization soil Desert, report abundant highly Thaumarchaeaota with oxidation potential. metabolic physiological insight into thaumarchaeal lineage globally distributed terrestrial habitats characterized various stresses. consequently expand known genetic repertoire but microbiome functioning ecosystems.
Language: Английский
Citations
29
The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 842, P. 156868 - 156868
Published: June 22, 2022
Language: Английский
Citations
19