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Investigation of viable taxa in the deep terrestrial biosphere suggests high rates of nutrient recycling
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Helmholtz Zentrum Dresden Rossendorf, Germany. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID-id: 0000-0003-3588-6676
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID-id: 0000-0001-9005-5168
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). (Ctr Ecol & Evolut Microbial Model Syst EEMiS)
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Univ Copenhagen, Denmark. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)
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2018 (engelsk)Inngår i: FEMS Microbiology Ecology, ISSN 0168-6496, E-ISSN 1574-6941, Vol. 94, nr 8, artikkel-id fiy121Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The deep biosphere is the largest 'bioreactor' on earth, and microbes inhabiting this biome profoundly influence global nutrient and energy cycles. An important question for deep biosphere microbiology is whether or not specific populations are viable. To address this, we used quantitative PCR and high throughput 16S rRNA gene sequencing of total and viable cells (i.e. with an intact cellular membrane) from three groundwaters with different ages and chemical constituents. There were no statistically significant differences in 16S rRNA gene abundances and microbial diversity between total and viable communities. This suggests that populations were adapted to prevailing oligo trophic conditions and that non-viable cells are rapidly degraded and recycled into new biomass. With higher concentrations of organic carbon, the modem marine and undefined mixed waters hosted a community with a larger range of predicted growth strategies than the ultra-oligo trophic old saline water. These strategies included fermentative and potentially symbiotic lifestyles by candidate phyla that typically have streamlined genomes. In contrast, the old saline waters had more 16S rRNA gene sequences in previously cultured lineages able to oxidize hydrogen and fix carbon dioxide. This matches the paradigm of a hydrogen and carbon dioxide-fed chemolithoauto trophic deep biosphere.

sted, utgiver, år, opplag, sider
Oxford University Press, 2018. Vol. 94, nr 8, artikkel-id fiy121
Emneord [en]
16S rRNA gene, deep subsurface, fracture groundwaters, propidium monoazide, viable cells, candidate phyla radiation
HSV kategori
Forskningsprogram
Ekologi, Mikrobiologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-77378DOI: 10.1093/femsec/fiy121ISI: 000441198800016PubMedID: 29931252Scopus ID: 2-s2.0-85054565006OAI: oai:DiVA.org:lnu-77378DiVA, id: diva2:1242519
Tilgjengelig fra: 2018-08-28 Laget: 2018-08-28 Sist oppdatert: 2019-08-29bibliografisk kontrollert

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Lopez-Fernandez, MargaritaBroman, EliasTurner, StephanieWu, XiaofenDopson, Mark

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