Projects per year
Personal profile
Research
With over 30 years of experience and research in lakes and their ecology, I have explored the effects of and interactions between nutrients on ecological conditions, water-sediment interactions, lake restoration, and topics related to the implementation of the EU’s Water Framework Directive.
Commissioned
Over the years, I have provided advice, particularly to the Danish Environmental Protection Agency (Miljøstyrelsen), on management-related topics. Since 2005, my focus has been on matters related to the implementation of the EU Water Framework Directive in Denmark
Cooperation and dissemination
I have collaborated with many research institutions both domestically and internationally. In Denmark, this collaboration has been supported by grants and agencies, while in Europe, it has been particularly through various research projects, including initiatives like Horizon 2020.
Teaching
I have taught several courses at the bachelor’s and master’s levels, particularly focusing on nutrient dynamics in lakes, lake restoration, and lake management. I am responsible for a bachelor’s course in biology related to the management of Danish nature and the environment. Additionally, I have taught within the SDC collaboration in China, specifically in the field of biogeochemistry
Areas of expertise
- Lake ecology
- Lake managment
- Sediment and nutrient dynamics
- Lake restoration
Fingerprint
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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
Projects
- 1 Active
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Framework contract to provide services to support development and implementation of EU freshwater policies
Jensen, P. N. (Participant), Madsen, K. B. (Other), Baattrup-Pedersen, A. (Participant), Hasler, B. (Participant), Astrup Kristensen, E. (Participant), Blicher-Mathiesen, G. (Participant), Thomsen, M. (Participant), Søndergaard, M. (Participant), Pizzol, M. (Participant), Friberg, N. (Participant), Frederiksen, P. (Participant), Boutrup, S. (Participant) & Lauridsen, T. L. (Participant)
15/08/2012 → …
Project: Research
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Are increasing roosting waterbird numbers responsible for eutrophication of shallow lakes? Examples from a Danish Ramsar site
Clausen, P., Lauridsen, T. L., Pedersen, C. L., Nielsen, H. H., Jeppesen, E., Søndergaard, M., Schreven, K. H. T., Nolet, B. A., Madsen, J. & Fox, A. D., Jan 2025, In: Hydrobiologia. 852, 2, p. 389-410 22 p., 106859.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Open AccessFile2 Citations (Scopus) -
Breeding waterbird species as ecological indicators of shifts from turbid to clear water conditions in northwest European shallow eutrophic lakes.
Fox, A. D., Jørgensen, H. E., Jeppesen, E., Lauridsen, T. L., Søndergaard, M., Fugl, K., Myssen, P. P., Balsby, T. J. S., Clausen, P., Musil, P. & Musilová, Z., Jan 2025, In: Hydrobiologia. 852, 2, p. 411-423 13 p., e11136.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Open AccessFile3 Citations (Scopus) -
Ecosystem changes in eight Danish lakes after zebra mussel invasion
Søndergaard, M., Johansson, L. S., Andersen, P. & Jeppesen, E., Jan 2025, In: Hydrobiologia. 852, 2, p. 305-322 18 p., e2100275118.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Open AccessFile2 Citations (Scopus) -
Pelagic niche shift by fishes following restorations of a eutrophic lake
Berthelsen, A. S., Søndergaard, M., Kiljunen, M., Eloranta, A. P. & Lauridsen, T. L., Jan 2025, In: Hydrobiologia. 852, 2, p. 289-303 15 p.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus) -
Recovery of lakes from eutrophication: changes in nitrogen retention capacity and the role of nitrogen legacy in 10 Danish lakes studied over 30 years
Jeppesen, E., Sørensen, P. B., Johansson, L. S., Søndergaard, M., Lauridsen, T. L., Nielsen, A. & Mejlhede, P., Jan 2025, In: Hydrobiologia. 852, 2, p. 377-387 11 p.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Open AccessFile6 Citations (Scopus)
Activities
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Water (Journal)
Søndergaard, M. (Editor) & Jeppesen, E. (Editor)
2016 → 2017Activity: Publication peer-review and editorial work types › Editor of Research journal › Research
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Vandrammedirektivets implementering i danske søer
Søndergaard, M. (Lecturer)
4 Mar 2014Activity: Presentations, memberships, ownership and other activities › Lecture and oral contribution
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Lake restoration and the internal cycling of nutrients in lakes
Søndergaard, M. (Lecturer)
17 Oct 2012Activity: Presentations, memberships, ownership and other activities › Lecture and oral contribution
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Danish lakes and their management
Søndergaard, M. (Lecturer)
15 Oct 2012Activity: Presentations, memberships, ownership and other activities › Lecture and oral contribution
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Sediments, nutrients and lakes
Søndergaard, M. (Lecturer)
13 Oct 2012Activity: Presentations, memberships, ownership and other activities › Lecture and oral contribution