Projects per year
Organisation 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
Profiles
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Jenni Hultman, Academy research fellow
- Department of Microbiology - Docent Contract, Title of Docent
- Helsinki Institute of Sustainability Science (HELSUS)
- Arctic Microbial Ecology
- Doctoral Programme in Geosciences - Supervisor for doctoral programme
- Doctoral Programme in Sustainable Use of Renewable Natural Resources - Supervisor for doctoral programme
- Doctoral Programme in Interdisciplinary Environmental Sciences - Supervisor for doctoral programme
- Doctoral Programme in Microbiology and Biotechnology - Supervisor for doctoral programme
Person: 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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Airborne DNA reveals predictable spatial and seasonal dynamics of fungi
Abrego, N., Furneaux, B., Hardwick, B., Somervuo, P., Palorinne, I., Aguilar-Trigueros, C. A., Andrew, N. R., Babiy, U. V., Bao, T., Bazzano, G., Bondarchuk, S. N., Bonebrake, T. C., Brennan, G. L., Bret-Harte, S., Bässler, C., Cagnolo, L., Cameron, E. K., Chapurlat, E., Creer, S., D’Acqui, L. P., & 93 others , 25 Jul 2024, In: Nature. 631, 8022, p. 835-842 8 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Discovery of Eremiobacterota with nifH homologues in tundra soil
Pessi, I. S., Delmont, T. O., Zehr, J. P. & Hultman, J., Jun 2024, In: Environmental microbiology reports. 16, 3, 5 p., e13277.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics
Pessi, I. S., Popin, R. V., Durieu, B., Lara, Y., Tytgat, B., Savaglia, V., Roncero-Ramos, B., Hultman, J., Verleyen, E., Vyverman, W. & Wilmotte, A., Jul 2023, In: Microbial Genomics. 9, 7, 14 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Candidatus Nitrosopolaris, a genus of putative ammonia-oxidizing archaea with a polar/alpine distribution
Pessi, I. S., Rutanen, A. & Hultman, J., 24 Jul 2022, In: FEMS Microbes. 3Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
In-depth characterization of denitrifier communities across different soil ecosystems in the tundra
Pessi, I. S., Viitamäki, S., Virkkala, A-M., Eronen-Rasimus, E., Delmont, T. O., Marushchak, M. E., Luoto, M. & Hultman, J., 11 Jun 2022, In: Environmental microbiome. 17, 17 p., 30.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile
Activities
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18th International Symposium on Microbial Ecology
Sirja Viitamäki (Poster Presentation)
14 Aug 2022 → 19 Aug 2022Activity: Participating in or organising an event types › Organisation and participation in conferences, workshops, courses, seminars
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Isolation and characterization of viruses infecting Acidobacteria from Arctic soil
Tatiana Demina (Supervisor) & Jenni Hultman (Supervisor)
2021Activity: Examination types › Supervision of other thesis (Master's, Licentiate)
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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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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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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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