Connectivity to the surface determines diversity patterns in subsurface aquifers of the Fennoscandian shield

Valerie Hubalek, Xiaofen Wu, Alexander Eiler, Moritz Buck, Christine Heim, Mark Dopson, Stefan Bertilsson, Danny Ionescu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Little research has been conducted on microbial diversity deep under the Earth's surface. In this study, the microbial communities of three deep terrestrial subsurface aquifers were investigated. Temporal community data over 6 years revealed that the phylogenetic structure and community dynamics were highly dependent on the degree of isolation from the earth surface biomes. The microbial community at the shallow site was the most dynamic and was dominated by the sulfur-oxidizing genera Sulfurovum or Sulfurimonas at all-time points. The microbial community in the meteoric water filled intermediate aquifer (water turnover approximately every 5 years) was less variable and was dominated by candidate phylum OD1. Metagenomic analysis of this water demonstrated the occurrence of key genes for nitrogen and carbon fixation, sulfate reduction, sulfide oxidation and fermentation. The deepest water mass (5000 year old waters) had the lowest taxon richness and surprisingly contained Cyanobacteria. The high relative abundance of phylogenetic groups associated with nitrogen and sulfur cycling, as well as fermentation implied that these processes were important in these systems. We conclude that the microbial community patterns appear to be shaped by the availability of energy and nutrient sources via connectivity to the surface or from deep geological processes.

Original languageEnglish (US)
Pages (from-to)2447-2458
Number of pages12
JournalISME Journal
Volume10
Issue number10
DOIs
StatePublished - Oct 1 2016

Fingerprint

Groundwater
aquifers
microbial communities
connectivity
microbial community
shield
aquifer
Water
fermentation
sulfur
Sulfur
Geological Phenomena
water
Fermentation
phylogenetics
carbon fixation
phylogeny
community dynamics
nitrogen fixation
Carbon Cycle

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Hubalek, Valerie ; Wu, Xiaofen ; Eiler, Alexander ; Buck, Moritz ; Heim, Christine ; Dopson, Mark ; Bertilsson, Stefan ; Ionescu, Danny. / Connectivity to the surface determines diversity patterns in subsurface aquifers of the Fennoscandian shield. In: ISME Journal. 2016 ; Vol. 10, No. 10. pp. 2447-2458.
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abstract = "Little research has been conducted on microbial diversity deep under the Earth's surface. In this study, the microbial communities of three deep terrestrial subsurface aquifers were investigated. Temporal community data over 6 years revealed that the phylogenetic structure and community dynamics were highly dependent on the degree of isolation from the earth surface biomes. The microbial community at the shallow site was the most dynamic and was dominated by the sulfur-oxidizing genera Sulfurovum or Sulfurimonas at all-time points. The microbial community in the meteoric water filled intermediate aquifer (water turnover approximately every 5 years) was less variable and was dominated by candidate phylum OD1. Metagenomic analysis of this water demonstrated the occurrence of key genes for nitrogen and carbon fixation, sulfate reduction, sulfide oxidation and fermentation. The deepest water mass (5000 year old waters) had the lowest taxon richness and surprisingly contained Cyanobacteria. The high relative abundance of phylogenetic groups associated with nitrogen and sulfur cycling, as well as fermentation implied that these processes were important in these systems. We conclude that the microbial community patterns appear to be shaped by the availability of energy and nutrient sources via connectivity to the surface or from deep geological processes.",
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Hubalek, V, Wu, X, Eiler, A, Buck, M, Heim, C, Dopson, M, Bertilsson, S & Ionescu, D 2016, 'Connectivity to the surface determines diversity patterns in subsurface aquifers of the Fennoscandian shield', ISME Journal, vol. 10, no. 10, pp. 2447-2458. https://doi.org/10.1038/ismej.2016.36

Connectivity to the surface determines diversity patterns in subsurface aquifers of the Fennoscandian shield. / Hubalek, Valerie; Wu, Xiaofen; Eiler, Alexander; Buck, Moritz; Heim, Christine; Dopson, Mark; Bertilsson, Stefan; Ionescu, Danny.

In: ISME Journal, Vol. 10, No. 10, 01.10.2016, p. 2447-2458.

Research output: Contribution to journalArticle

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