Projects per year
Organisation profile
Organisation Profile
Our research focuses on the functioning of lake ecosystems, especially on food web interactions and nutrient cycling and their implications on lake restoration and management. Additionally, coastal environments are included in the studies. In the food web studies, many projects have been targeted on the effects of disturbances on predator-prey interactions and on the effects of top-down regulation. The studied disturbances have included for instance increasing water turbidity, water colour and turbulence. Studies on nutrient cycling have mostly been targeted on factors regulating the internal nutrient loading of lakes, including for instance sediment resuspension, bioturbation and oxygen conditions. Both pelagic and littoral zones have been included in the food web interaction studies as well as in nutrient cycling studies. The studies include field sampling, as well as experimental work in the field and in the laboratory. Many of the studies are connected to lake management and restoration projects and are planned to improve our knowledge on the effects and applicability of different restoration methods. The studied restoration methods include food web management (biomanipulation), artificial aeration and hypolimnetic withdrawal. The research results have affected the restoration activities of several lakes. Read more on our website
Fields of Science
- 1172 Environmental sciences
- 1181 Ecology, evolutionary biology
Collaborations and top research areas from the last five years
Profiles
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Jukka Horppila
- Ecosystems and Environment Research Programme - Professor
- Doctoral Programme in Interdisciplinary Environmental Sciences - Supervisor for doctoral programme
- Helsinki Institute of Sustainability Science (HELSUS)
- Lake Ecosystem Dynamics
Person: UH , U4 Research and teaching staff
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Leena Nurminen
- Ecosystems and Environment Research Programme - University Lecturer
- Doctoral Programme in Geosciences - Supervisor for doctoral programme
- Doctoral Programme in Interdisciplinary Environmental Sciences - Supervisor for doctoral programme
- Helsinki Institute of Sustainability Science (HELSUS)
- Lake Ecosystem Dynamics
Person: U3 Research and teaching staff, UH
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Olga Tammeorg
- Department of Agricultural Sciences - University Researcher
- Doctoral Programme in Sustainable Use of Renewable Natural Resources - Supervisor for doctoral programme
- Lake Ecosystem Dynamics
Person: U3 Research and teaching staff, UH
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The development of internal loading phosphorus loading in an aerated lake
Horppila, J. (Project manager), Niemistö, J. (Project manager) & Silvonen, S. (Participant)
01/02/2016 → 31/12/2107
Project: Research project
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VESIKUJA: Vesistöjen sisäinen kuormitus hyötykäyttöön - uuden sovelluksen jalkauttaminen
Nurminen, L. (Project manager), Niemistö, J. (Principal Investigator), Jilbert, T. (Principal Investigator), Silvonen, S. (Participant) & Horppila, J. (Principal Investigator)
01/01/2020 → 31/12/2020
Project: Research project
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Alusveden puhdistus ympärivuotiseksi - sisäisen fosforikuormituksen hyödyntäminen talvella
Horppila, J. (Project manager) & Niemistö, J. (Project manager)
01/12/2018 → 31/05/2020
Project: Research project
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Järvien kunnostus ja ravinteiden kierrätys sisäistä kuormitusta hyödyntämällä - alusveden puhdistuksen uusi sovellus
Horppila, J. (Project manager), Jilbert, T. (Participant), Nurminen, L. (Participant) & Niemistö, J. (Participant)
23/10/2017 → 31/12/2019
Project: Research project
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Sekoitushapetuksen vaikutus turbulenssiin ja sameuteen Tuusulanjärvellä
Niemistö, J. (Project manager)
01/07/2017 → 31/10/2017
Project: Research project
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Effects of water color on underwater irradiance and consequences for photosynthetic pigments of primary producers in boreal lakes
Horppila, J., Lenard, T., Nurminen, L., Rajala, S., Sainio, K. & Estlander, S., 2025, In: Canadian Journal of Fisheries and Aquatic Sciences. 82, p. 1-12 12 p.Research output: Contribution to journal › Article › Scientific › peer-review
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Investigating tools for biomonitoring browning in streams: chlorophyll content of Fontinalis antipyretica
Rajala, S., Estlander, S., Nurminen, L. & Horppila, J., 3 Jun 2025, In: Knowledge and Management of Aquatic Ecosystems. 426, 8 p., 16.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Long-term water quality responses to sediment removal in a small, shallow, urban lake
Härkönen, L. H., Taskinen, A., Tammeorg, O. & Granlund-Blomfelt, A. L., Sept 2025, In: Ecological Engineering. 219, 17 p., 107715.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Menetelmäohje kerrostuville järville soveltuvalle alusveden suodatukselle
Nurminen, L., Horppila, J., Silvonen, S., Härkönen, L. H. & Lukkari, K., 2025, Helsingin yliopisto. 21 p.Research output: Book/Report › Commissioned report
Open AccessFile -
Photosynthetic Pigment Variations in Aquatic Primary Producers Along a Water Colour Gradient: A Possible Bioindicator for Freshwater Browning
Rajala, S., 2025, Helsinki.Research output: Thesis › Doctoral Thesis › Collection of Articles
Open Access
Activities
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Kosteikko järvien kunnostuksessa käytettävän alusveden suodatuksen tukena Kivipuron rakennettu kosteikko Kymijärven kunnostuspilotissa
Nurminen, L. (Supervisor)
2025 → …Activity: Examination types › Supervision of other thesis (Master's, Licentiate)
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Participation in the session of the Supreme Administrational Court
Horppila, J. (Participant)
5 Jun 2025Activity: Other activity types › Other
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Feasibility of closed-circuit hypolimnetic withdrawal: New avenues for long term results in lake restoration by utilizing water treatment technology?
Nurminen, L. (Speaker)
9 Sept 2025 → 11 Sept 2025Activity: Talk or presentation types › Oral presentation
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Vesistökunnostusverkoston aamukahvit (esitys)
Nurminen, L. (Attendee)
5 Mar 2025Activity: Participating in or organising an event types › Public Talks
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Järvien tummuminen ja ekologinen luokittelu
Nurminen, L. (Attendee)
9 May 2025Activity: Participating in or organising an event types › Organisation and participation in conferences, workshops, courses, seminars
Prizes
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Frontiers Planet Prize 2023 National Champion of Finland
Tammeorg, O. (Recipient), Tammeorg, P. (Recipient), Kiani, M. (Recipient), Horppila, J. (Recipient), Jilbert, T. (Recipient), Hellsten, S. (Recipient), Härkönen, L. (Recipient), Nurminen, L. (Recipient), Ruuhijärvi, J. (Recipient), Kotamäki, N. (Recipient), Silvonen, S. (Recipient) & Ventelä, A.-M. (Recipient), 22 Apr 2024
Prize: Prizes and awards
Press/Media
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Dredged lake sediment could nourish new crops
Tammeorg, P., Kiani, M., Tammeorg, O., Zrim, J. & Simojoki, A.
17/04/2023 → 02/05/2023
4 Media contributions
Press/Media: Press / Media
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Haastattelu hoitokalastuksen soveltuvuudesta Hiidenveden kunnostukseen
01/02/2013
1 Media contribution
Press/Media: Press / Media