Deep life in Fennoscandian Shield

metagenomics studies of deep microbiome an insight into species diversity and their functions

Merja Itävaara

Research output: Contribution to conferenceConference articleScientific

Abstract

The continental earth crust contains regions of very different age and composition including crystalline rocks, metamorphic systems, sedimentary basins and organic deposits, and magmatic intrusions. Throughout the crust, fluids are the principal agents in transporting and focusing Earth's energy and mineral resources. In Finland the earth crust is around 50km deep and the bedrock is very stable crystal-line bedrock which is also supposed to be safe for long term storage of nuclear wastes. Deep terrestrial subsurface microbial populations are still highly unexplored, and their origin and interactions with surface populations are not known. In Finland we have access to several deep sampling sites and have developed microbiological sampling techniques. The main goal of our studies have been to characterize the biodiversity of Fennoscandian Shield microbiome and sources of carbon and energy in the bedrock of Finland. Based on considerable efforts to analyse both active and latent microbial communities and eval-uate how addition of electron acceptors and donors affect the microbial communities we have found that in most cases deep subsurface microbial communities are 'sleeping' e.g at their maintainance energy level but may be activated due to environmental changes such as evolution of methane and hydrogen from the deep earth crust. Our studies based on metagenomics have revealed several ongoing processes such as deep nitrogen fixation, carbon cycling and other geobiological processes occurring in deep terrestrial habitats.
Original languageEnglish
Publication statusPublished - 2014
EventNinth International conference of deep subsurface - Pacific Grove, United States
Duration: 5 Oct 201410 Oct 2014

Conference

ConferenceNinth International conference of deep subsurface
CountryUnited States
CityPacific Grove
Period5/10/1410/10/14

Fingerprint

microbial community
shield
species diversity
bedrock
carbon
crystalline rock
nitrogen fixation
energy resource
mineral resource
sedimentary basin
radioactive waste
energy
environmental change
methane
hydrogen
biodiversity
crystal
crust
electron
fluid

Keywords

  • deep subsurface
  • deep biosphere
  • metagenomics
  • microbial diversity

Cite this

Itävaara, M. (2014). Deep life in Fennoscandian Shield: metagenomics studies of deep microbiome an insight into species diversity and their functions. Paper presented at Ninth International conference of deep subsurface, Pacific Grove, United States.
Itävaara, Merja. / Deep life in Fennoscandian Shield : metagenomics studies of deep microbiome an insight into species diversity and their functions. Paper presented at Ninth International conference of deep subsurface, Pacific Grove, United States.
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abstract = "The continental earth crust contains regions of very different age and composition including crystalline rocks, metamorphic systems, sedimentary basins and organic deposits, and magmatic intrusions. Throughout the crust, fluids are the principal agents in transporting and focusing Earth's energy and mineral resources. In Finland the earth crust is around 50km deep and the bedrock is very stable crystal-line bedrock which is also supposed to be safe for long term storage of nuclear wastes. Deep terrestrial subsurface microbial populations are still highly unexplored, and their origin and interactions with surface populations are not known. In Finland we have access to several deep sampling sites and have developed microbiological sampling techniques. The main goal of our studies have been to characterize the biodiversity of Fennoscandian Shield microbiome and sources of carbon and energy in the bedrock of Finland. Based on considerable efforts to analyse both active and latent microbial communities and eval-uate how addition of electron acceptors and donors affect the microbial communities we have found that in most cases deep subsurface microbial communities are 'sleeping' e.g at their maintainance energy level but may be activated due to environmental changes such as evolution of methane and hydrogen from the deep earth crust. Our studies based on metagenomics have revealed several ongoing processes such as deep nitrogen fixation, carbon cycling and other geobiological processes occurring in deep terrestrial habitats.",
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Itävaara, M 2014, 'Deep life in Fennoscandian Shield: metagenomics studies of deep microbiome an insight into species diversity and their functions' Paper presented at Ninth International conference of deep subsurface, Pacific Grove, United States, 5/10/14 - 10/10/14, .

Deep life in Fennoscandian Shield : metagenomics studies of deep microbiome an insight into species diversity and their functions. / Itävaara, Merja.

2014. Paper presented at Ninth International conference of deep subsurface, Pacific Grove, United States.

Research output: Contribution to conferenceConference articleScientific

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T1 - Deep life in Fennoscandian Shield

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AU - Itävaara, Merja

PY - 2014

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AB - The continental earth crust contains regions of very different age and composition including crystalline rocks, metamorphic systems, sedimentary basins and organic deposits, and magmatic intrusions. Throughout the crust, fluids are the principal agents in transporting and focusing Earth's energy and mineral resources. In Finland the earth crust is around 50km deep and the bedrock is very stable crystal-line bedrock which is also supposed to be safe for long term storage of nuclear wastes. Deep terrestrial subsurface microbial populations are still highly unexplored, and their origin and interactions with surface populations are not known. In Finland we have access to several deep sampling sites and have developed microbiological sampling techniques. The main goal of our studies have been to characterize the biodiversity of Fennoscandian Shield microbiome and sources of carbon and energy in the bedrock of Finland. Based on considerable efforts to analyse both active and latent microbial communities and eval-uate how addition of electron acceptors and donors affect the microbial communities we have found that in most cases deep subsurface microbial communities are 'sleeping' e.g at their maintainance energy level but may be activated due to environmental changes such as evolution of methane and hydrogen from the deep earth crust. Our studies based on metagenomics have revealed several ongoing processes such as deep nitrogen fixation, carbon cycling and other geobiological processes occurring in deep terrestrial habitats.

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Itävaara M. Deep life in Fennoscandian Shield: metagenomics studies of deep microbiome an insight into species diversity and their functions. 2014. Paper presented at Ninth International conference of deep subsurface, Pacific Grove, United States.