Projects per year
Organisation profile
Organisation Profile
We study how soil carbon (C) and nitrogen (N) cycling processes change in response to global warming and aim to advance understanding of the underlying mechanisms. We work in different scales from field work on climatic gradients in high latitude and high-altitude ecosystems, to controlled mesocosm studies and laboratory incubations. Read more on our website.
Collaborations and top research areas from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
Profiles
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Kristiina Karhu
- Department of Forest Sciences - Associate professor
- Doctoral Programme in Interdisciplinary Environmental Sciences - Supervisor for doctoral programme
- Doctoral Programme in Sustainable Use of Renewable Natural Resources - Supervisor for doctoral programme
- Ecosystem processes (INAR Faculty of Agriculture and Forestry)
- Soils and Climate Change research group
- Forest Ecology and Management
Person: U3 Research and teaching staff, UH , Teaching and research personnel
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Maiju Kosunen
- Department of Forest Sciences - University Lecturer
- Soils and Climate Change research group
- Forest Health Group
Person: U3 Research and teaching staff, UH
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Xuhui Luo
- Department of Forest Sciences - Grant-funded researcher
- Doctoral Programme in Sustainable Use of Renewable Natural Resources
- Soils and Climate Change research group
Person: Visiting scholar, Doctoral Researcher
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Eva-Maria Roth
- Department of Forest Sciences - Visiting scholar
- Soils and Climate Change research group
Person: Visiting scholar, U1 Research and teaching staff
Projects
- 5 Finished
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Comparing the impact of continuous cover forest management and rotation forest management on long-term soil carbon storage
Roth, E.-M. (Principal Investigator), Karhu, K. (Co-Principal Investigator), Helmisaari, H.-S. M. (Co-Principal Investigator) & Tuittila, E.-S. (Co-Principal Investigator)
01/01/2020 → 31/10/2025
Project: Research project
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Muuttuvan ilmaston vaikutus mikrobiyhteisön toimintaan ja monimuotoisuuteen
Karhu, K. (Project manager) & Sietiö, O.-M. (Project manager)
01/12/2018 → 30/09/2022
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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UNCAP: Unravelling the mechanisms of the soil “microbial carbon pump” – soil C sequestration under global change
Karhu, K. (Project manager), Sietiö, O.-M. (Participant), Martín Vivanco, A. K. (Participant) & Mganga, K. (Participant)
01/09/2018 → 31/08/2023
Project: Research project
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TAITASMART: Environmental sensing of ecosystem services for developing climate smart landscape framework to improve food security in East Africa
Pellikka, P. (Principal Investigator), Alakukku, L. (Principal Investigator), Vesala, T. (Principal Investigator), Johansson, T. (Participant), Heiskanen, J. (Participant), Räsänen, M. (Participant), Tuure, J. (Participant), Adhikari, H. (Participant), Piiroinen, R. (Participant), Abera, T. (Participant), Tang, Z. (Participant), Wachiye, S. A. (Participant), Mäkelä, P. (Participant), Karhu, K. (Participant), Di Minin, E. (Participant) & Autio, A. (Participant)
European Commission, DG International Cooperation and Development
01/03/2018 → 01/03/2022
Project: Research project
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InCan: Increasing soil carbon stocks and reducing nitrogen leaching with biochar
Kalu, S. (Participant) & Karhu, K. (Principal Investigator)
01/01/2018 → 31/12/2020
Project: University of Helsinki Three-Year Research Project
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Different effects of continuous-cover and rotation forest management on soil organic carbon stabilization in a boreal Norway spruce forest
Roth, E.-M., Sietiö, O.-M., Adamczyk, B., Xu, P., Valkonen, S., Helmisaari, H.-S. M. & Karhu, K., 1 Feb 2026, In: Forest Ecology and Management. 601, 14 p., 123347.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Microbial death in the Andes: necromass declines despite growth and carbon-use-efficiency increases with decadal soil warming
Nottingham, A. T., Karhu, K., Salinas, N., Schnecker, J., Sietiö, O. M., Martin-Vivanco, A. K., Wanek, W. & Meir, P., Feb 2026, In: Soil Biology and Biochemistry. 213, 13 p., 110002.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Modified fast UHPLC method for quantification of soil amino sugars – improved sensitivity compared to the GC method
Maltari, R., Seppänen, A. A., Roslund, K. E. & Karhu, K., Jan 2026, In: Soil Biology & Biochemistry. 212, 8 p., 110003.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
A socio-ecological study on a citizen-based initiative to transform urban lawns into meadows within the Helsinki metropolitan area
Olascoaga, B., Oldén, A., Karhu, K., Duplouy, A., Halme, P., Vainio, A. & Clayton, S., 2025, A socio-ecological study on a citizen-based initiative to transform urban lawns into meadows within the Helsinki metropolitan area. Bulgaria: ARPHA Conference Abstracts, Vol. 8. 4 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Professional
Open Access -
Attitudes towards urban lawns and meadows and short-term environmental effects of transforming lawns into meadows in Helsinki metropolitan area
Olascoaga, B., Oldén, A., Karhu, K., Duplouy, A., Halme, P., Vainio, A. & Clayton, S., 28 Apr 2025.Research output: Conference materials › Abstract
Open Access
Activities
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Forest Ecology and Management (Journal)
Roth, E.-M. (Reviewer)
18 Jul 2025 → 6 Oct 2025Activity: Publication peer-review and editorial work types › Peer review of manuscripts
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Supervision of a master's student
Roth, E.-M. (Co-supervisor), Karhu, K. (Co-supervisor), Repo, A. (Co-supervisor) & Eyvindson, K. (Co-supervisor)
15 Jan 2025 → 30 Aug 2025Activity: Examination types › Supervision of other thesis (Master's, Licentiate)
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Metsätieteiden päivä (Forest Sciences day)
Roth, E.-M. (Speaker)
21 Oct 2025Activity: Talk or presentation types › Oral presentation
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Forest Ecology and Management (Journal)
Roth, E.-M. (Reviewer)
30 Apr 2024 → 21 May 2024Activity: Publication peer-review and editorial work types › Peer review of manuscripts
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EGU General Assembly 2024
Roth, E.-M. (Speaker)
19 Apr 2024Activity: Talk or presentation types › Oral presentation
Prizes
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Finnish Natural Resources Research Foundation - Research grant
Roth, E.-M. (Recipient), 11 Dec 2019
Prize: Prizes and awards
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Suomen Metsätieteellinen Seura - Research grant
Roth, E.-M. (Recipient), 9 Apr 2025
Prize: Prizes and awards
Datasets
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Data for: How do harvesting methods applied in continuous-cover forestry and rotation forest management impact soil carbon storage and degradability in boreal Scots pine forests?
Roth, E.-M. (Creator), Karhu, K. (Creator), Koivula, M. (Creator), Helmisaari, H.-S. (Creator) & Tuittila, E.-S. (Creator), Dryad, 6 Jun 2023
Dataset