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

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

Towards an applied metaecology

Schiesari, L., Matias, M. G., Prado, P. I., Leibold, M. A., Albert, C. H., Howeth, J. G., Leroux, S. J., Pardini, R., Siqueira, T., Brancalion, P. H. S., Cabeza, M., Coutinho, R. M., Felizola Diniz-Filho, J. A., Fournier, B., Lahr, D. J. G., Lewinsohn, T. M., Martins, A., Morsello, C., Peres-Neto, P. R., Pillar, V. D. & 1 others, Vazquez, D. P., Oct 2019, In : Perspectives in ecology and conservation. 17, 4, p. 172-181 10 p.

Research output: Contribution to journalReview ArticleScientificpeer-review

Open Access
File

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., ARTN e00104-18.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File

Community structure and distribution of benthic cyanobacteria in Antarctic lacustrine microbial mats

Pessi, I. S., Lara, Y., Durieu, B., Maalouf, P. D. C., Verleyen, E. & Wilmotte, A., May 2018, In : FEMS Microbiology Ecology. 94, 5, 13 p., 042.

Research output: Contribution to journalArticleScientificpeer-review

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

Activities

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

Antibioottiresistenssi-ilta 2019

Merja Rantala (Speaker: Keynote), Marko Virta (Speaker: Opponent/discussant), Salla Sariola (Speaker: Opponent/discussant), Mari Kanerva (Speaker: Opponent/discussant), Sirja Viitamäki (Chair), Jesse Vänttinen (Speaker: Presenter), Minna Maunula (Chair of organizing committee), Anniina Sarekoski (Member of organizing committee)
15 Nov 2019

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

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

Meta-omics investigation of soil communities in the Finnish Arctic tundra

Igor S Pessi (Speaker)
8 Feb 2019

Activity: Talk or presentation typesOral presentation

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

Functions and activity of soil microbial communities in the changing Arctic

Sirja Viitamäki (Speaker)
4 Mar 2019

Activity: Talk or presentation typesOral presentation

Press / Media

Microbes and Climate Change

Jenni Hultman

02/10/2017

1 Media contribution

Press/Media: Press / Media