Projects per year
Organization 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
Profiles
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Jenni Hultman, Academy research fellow
- Department of Microbiology - Academy Research Fellow, Title of Docent
- Helsinki Institute of Sustainability Science (HELSUS)
- Arctic Microbial Ecology
- Doctoral Programme in Microbiology and Biotechnology - Supervisor for doctoral programme
Person: U3 Research and teaching staff, UH
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Igor S Pessi
- Department of Microbiology - Postdoctoral Researcher
- Helsinki Institute of Sustainability Science (HELSUS)
- Arctic Microbial Ecology
Person: U2 Teaching and research staff, UH
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Sirja Viitamäki
- Department of Microbiology - Doctoral Researcher
- Arctic Microbial Ecology
- Doctoral Programme in Microbiology and Biotechnology
Person: U1 Research and teaching staff, Doctoral Researcher, UH
Projects
- 1 Finished
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Changing Climate Alters Microbial Community Function In Arctic Regions
Hultman, J., Viitamäki, S. & Pessi, I. S.
01/01/2017 → 31/12/2019
Project: University of Helsinki Three-Year Research Project
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In-depth characterization of denitrifier communities across different soil ecosystems in the tundra
Pessi, I. S., Viitamaki, S., Virkkala, A-M., Eronen-Rasimus, E., Delmont, T. O., Marushchak, M. E., Luoto, M. & Hultman, J., 11 Jun 2022, In: Environmental microbiome. 17, 1, 17 p., 30.Research output: Contribution to journal › Article › Scientific › peer-review
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Bacteria-invertebrate interactions as an asset in developing new antifouling coatings for man-made aquatic surfaces
Agostini, V. O., Muxagata, E., Leaes Pinho, G. L., Pessi, I. S. & Macedo, A. J., 15 Feb 2021, In: Environmental Pollution. 271, 12 p., 116284.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Sea-Ice Bacteria Halomonas sp. Strain 363 and Paracoccus sp. Strain 392 Produce Multiple Types of Poly-3-Hydroxyalkaonoic Acid (PHA) Storage Polymers at Low Temperature
Eronen-Rasimus, E. L., Hultman, J., Hai, T., Pessi, I. S., Collins, E., Wright, S., Laine, P., Viitamäki, S., Lyra, C., Thomas, D. N., Golyshin, P., Luhtanen, A-M., Kuosa, H. & Kaartokallio, H., Sep 2021, In: Applied and Environmental Microbiology. 87, 17, 12 p., ARTN e00929-21.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Longitudinal Metatranscriptomic Analysis of a Meat Spoilage Microbiome Detects Abundant Continued Fermentation and Environmental Stress Responses during Shelf Life and Beyond
Hultman, J., Johansson, P. & Bjorkroth, J., Dec 2020, In: Applied and Environmental Microbiology. 86, 24, 15 p., e01575-20.Research output: Contribution to journal › Article › Scientific › peer-review
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Metabolomics and bacterial diversity of packaged yellowfin tuna (Thunnus albacares) and salmon (Salmo salar) show fish species-specific spoilage development during chilled storage
Jääskeläinen, E., Jakobsen, L. M. A., Hultman, J., Eggers, N., Bertram, H. C. & Björkroth, J., Mar 2019, In: International Journal of Food Microbiology. 293, p. 44-52 9 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile
Activities
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Meta-omics investigation of soil communities in the Finnish Arctic tundra
Igor S Pessi (Speaker)
8 Feb 2019Activity: Talk or presentation types › Oral presentation
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15th Symposium on Bacterial Genetics and Ecology
Sirja Viitamäki (Poster Presentation)
26 May 2019 → 30 May 2019Activity: Participating in or organising an event types › Organisation and participation in conferences, workshops, courses, seminars
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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 2019Activity: Participating in or organising an event types › Organisation and participation in conferences, workshops, courses, seminars
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Medical University Graz
Sirja Viitamäki (Visiting researcher) & Igor S Pessi (Visiting researcher)
10 Apr 2019 → 18 Apr 2019Activity: Visiting an external institution types › Academic visit to other institution
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Functions and activity of soil microbial communities in the changing Arctic
Sirja Viitamäki (Speaker)
4 Mar 2019Activity: Talk or presentation types › Oral presentation
Press / Media
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Forskare vill ambitiöst nog samla in dna från alla mikrobarter i världen - också på rymdstationen ISS
16/12/2017
1 Media contribution
Press/Media: Press / Media
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