Organization profile

Organisation Profile

Based on the recent calculations climate change is more rapid in the Arctic than in any other region. Previously frozen ground is thawing and releasing substantial quantities of carbon which microbes can decompose. Microbes mineralize the carbon fraction and convert it to carbon dioxide and methane. Climate change models estimate that C released from thawing arctic permafrost might represent the largest future transfer of C from the biosphere to the atmosphere resulting in a positive feedback loop. In addition to CH4 and CO2 flux, thawing permafrost releases nitrogen which can result as nitrous oxide flux, another greenhouse gas with high climate warming potential.

Our interest is in understanding how microbes in the arctic soils respond to the warming on a molecular scale and what is the function and role of the microbial communities in production of greenhouse gases in the arctic. The tools used are based on high throughput sequencing of the community DNA and RNA i.e. metagenomics and metatranscriptomics. Read more from our webpage https://www.helsinki.fi/en/researchgroups/molecular-environmental-biosciences/research/arctic-microbial-ecology

International and National Collaboration Publications and projects within past five years.

Projects 2017 2019

Changing Climate Alters Microbial Community Function In Arctic Regions

Hultman, J., Viitamäki, S. & Pessi, I. S.

Helsingin yliopisto

01/01/201731/12/2019

Project: University of Helsinki Three-Year Research Project

Publications 2017 2018

Black Queen Evolution and Trophic Interactions Determine Plasmid Survival after the Disruption of the Conjugation Network

Cairns, J., Koskinen, K., Penttinen, R., Patinen, T., Hartikainen, A., Jokela, R., Ruusulehto, L., Viitamäki, S., Mattila, S., Hiltunen, T. & Jalasvuori, M., 2 Oct 2018, In : mSystems. 3, 5, 14 p., e00104-18.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Construction and characterization of synthetic bacterial community for experimental ecology and evolution

Cairns, J., Jokela, R., Hultman, J., Tamminen, M., Virta, M. & Hiltunen, T., 14 Aug 2018, In : Frontiers in Genetics. 9, 12 p., 312.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Ecology determines how low antibiotic concentration impacts community composition and horizontal transfer of resistance genes

Cairns, J., Ruokolainen, L., Hultman, J., Tamminen, M., Virta, M. & Hiltunen, T., 19 Apr 2018, In : Communications Biology. 1, 8 p., 35.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Host range of antibiotic resistance genes in wastewater treatment plant influent and effluent

Hultman, J., Tamminen, M., Pärnänen, K., Cairns, J., Karkman, A. & Virta, M., 1 Apr 2018, In : FEMS Microbiology Ecology. 94, 4, p. 1-10 10 p., fiy038.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Maternal gut and breast milk microbiota affect infant gut antibiotic resistome and mobile genetic elements

Pärnänen, K., Karkman, A., Hultman, J., Lyra, C., Bengtsson-Palme, J., Larsson, D. G. J., Rautava, S., Isolauri, E., Salminen, S., Kumar, H., Satokari, R. & Virta, M., 24 Sep 2018, In : Nature Communications. 9, 11 p., 3891.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Activities 2017 2019

  • 7 Organisation and participation in conferences, workshops, courses, seminars
  • 7 Oral presentation
  • 3 Invited talk
  • 2 Academic visit to other institution

Functions and activity of soil microbial communities in the changing Arctic

Sirja Viitamäki (Speaker)
4 Mar 2019

Activity: Talk or presentation typesOral presentation

15th Symposium on Bacterial Genetics and Ecology

Sirja Viitamäki (Poster Presentation)
26 May 201930 May 2019

Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

Medical University Graz

Sirja Viitamäki (Visiting researcher), Igor S Pessi (Visiting researcher)
10 Apr 201918 Apr 2019

Activity: Visiting an external institution typesAcademic visit to other institution

Press / Media

Microbes and Climate Change

Jenni Hultman

02/10/2017

1 media contribution

Press/Media: Press / Media