Publications

Johan E. Kjær, Marta Baumane, Filippa Fredriksson, Søren Jessen, Kenneth T. Martinsen, Tobias Skjærlund, Andreas K. Norrild, Mads E. R. Hansen, Kaj Sand-Jensen, Hans H. Bruun, Lars Baastrup-Spohr (2025). Effects of riparian wetland restoration and grazing on CH4 and CO2 exchange more than a decade after rewetting. Restoration Ecology.

Sanne M. Moedt, Tenna Riis, Dean Jacobsen, Ole Geertz-Hansen, Kenneth T. Martinsen, Kirsten S. Christoffersen (2025). Environmental controls of autotrophic biofilm biomass and community composition in subarctic lakes and streams in Greenland. Limnology and Oceanography.

Jonas Stage Sø, Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2025). Ebullition dominates high methane emissions globally across all lake sizes. Biogeochemistry.

Filippa Fredriksson, Kenneth T. Martinsen, Kai-Ying Liao, Tyler B. Coplen, Rasmus Jakobsen, Okke Batelaan, Søren Jessen (2025). Characterization of DOC in riparian wetland pore water and its interference in stable water isotope analysis of δ2H and δ18O. Journal of Hydrology.

Sanne M. Moedt, Kirsten S. Christoffersen, Andreas Westergaard-Nielsen, Kenneth T. Martinsen, Ada Pastor, Niels Jákup Korsgaard, Tenna Riis (2025). Drivers of Epilithic Biofilms in Greenland Streams: The Role of Nutrients, Temperature and Catchment Slope Across a Climate Gradient. Environmental Microbiology Reports.

Dean Jacobsen, Steve J. Ormerod, Ingrid Jüttner, Oscar Rojas, Kenneth Thorø Martinsen, Bhumika Thapa, Kumar Khatri, Pratima Paudel, Manita Rai, Nani Raut, Smriti Gurung (2024). Long-term changes and seasonal variability in the stream macrofauna of a Himalayan river system. Inland Waters.

Marta Baumane, Lars Baastrup-Spohr, Kaj Sand-Jensen, Irina Goldberg, Kenneth Thorø Martinsen, Hans Henrik Bruun (2024). Nutrients, isolation and lack of grazing limit plant diversity in restored wetlands. Journal of Applied Ecology.

Joseph S. Rabaey, Meredith A. Holgerson, David C. Richardson, Mikkel R. Andersen, Sheel Bansal, Lauren E. Bortolotti, James B. Cotner, Daniel J. Hornbach, Kenneth Thorø Martinsen, Eric K. Moody, Olivia F. Schloegel (2024). Freshwater Biogeochemical Hotspots: High Primary Production and Ecosystem Respiration in Shallow Waterbodies. Geophysical Research Letters.

Kenneth Thorø Martinsen, Kaj Sand-Jensen, Victor Bergmann, Tobias Skjærlund, Johan Emil Kjær, Julian Koch (2024). Seasonal Carbon Dioxide Concentrations and Fluxes Throughout Denmark's Stream Network. Journal of Geophysical Research: Biogeosciences.

Jonas Stage Sø, Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2024). Hourly methane and carbon dioxide fluxes from temperate ponds. Biogeochemistry.

Kenneth Thorø Martinsen, Søren Thromsholdt Christensen, Kaj Sand-Jensen (2023). Kunstig intelligens i miljøovervågningen?. Vand & Jord.

Kenneth Thorø Martinsen, Emil Kristensen, Lars Baastrup-Spohr, Theis Kragh, Martin Søndergaard, Erik Jeppesen, Henrik Carl, Kaj Sand-Jensen (2023). Hvad bestemmer fiskenes biodiversitet i danske søer?. Vand & Jord.

Kenneth Thorø Martinsen, Kaj Sand-Jensen, Raghavendra Selvan (2023). Predicting lake bathymetry from the topography of the surrounding terrain using deep learning. Limnology and Oceanography: Methods.

Sune Ringsing Nielsen, Kenneth Thorø Martinsen, Ole Pedersen, Lars Baastrup-Spohr (2023). Reasons for the dramatic loss of Lobelia dortmanna, a keystone plant species of softwater lakes in the Northern Hemisphere. Freshwater Biology.

Kenneth Thorø Martinsen, Emil Kristensen, Lars Baastrup-Spohr, Martin Søndergaard, Henrik Carl, Erik Jeppesen, Kaj Sand-Jensen, Theis Kragh (2023). Environmental predictors of lake fish diversity across gradients in lake age and spatial scale. Freshwater Biology.

Jonas Stage Sø, Kaj Sand-Jensen, Kenneth Thorø Martinsen, Emma Polauke, Johan Emil Kjær, Kasper Reitzel, Theis Kragh (2023). Methane and carbon dioxide fluxes at high spatiotemporal resolution from a small temperate lake. Science of The Total Environment.

Kenneth Thorø Martinsen, Kaj Sand-Jensen (2022). CO2 i Skandinaviens vandløb analyseret med maskinlæring. Vand & Jord.

Kaj Sand-Jensen, Tenna Riis, Johan Emil Kjær, Kenneth Thorø Martinsen (2022). Stream-lake connectivity is an important control of fluvial CO2 concentrations and emissions in catchments. Earth and Space Science.

Kaj Sand-Jensen, Kenneth Thorø Martinsen, Theis Kragh (2022). Intelligente computersystemer i økologien. Aktuel Naturvidenskab.

Kenneth Thorø Martinsen, Kaj Sand-Jensen (2022). Predicting water quality from geospatial lake, catchment, and buffer zone characteristics in temperate lowland lakes. Science of The Total Environment.

Kenneth Thorø Martinsen, Nathalie Brandt Zak, Lars Baastrup-Spohr, Theis Kragh, Kaj Sand-Jensen (2022). Ecosystem metabolism and gradients of temperature, oxygen and dissolved inorganic carbon in the littoral zone of a macrophyte-dominated lake. Journal of Geophysical Research: Biogeosciences.

Kaj Sand-Jensen, Tenna Riis, Kenneth Thorø Martinsen (2022). Photosynthesis, growth, and distribution of plants in lowland streams—A synthesis and new data analyses of 40 years research. Freshwater Biology.

Theis Kragh, Thor Kolath, Anja Svane, Kasper Reitzel, Kenneth Thorø Martinsen, Martin Søndergaard, Carl Christian Hoffman, Lars Baastrup Spohr, Sara Egemose (2022). External Phosphorus Loading in New Lakes. Water.

Kaj Sand-Jensen, Kenneth Thorø Martinsen, Johan Emil Kjær, Jonas Stage Sø, Marta Baumane, Theis Kragh, Lars Baastrup-Spohr, Hans Henrik Bruun, Tenna Riis (2022). Vandløbenes CO2-overmætning og biodiversitet. Vand & Jord.

Jonas Stage Sø, Theis Kragh, Kaj Sand-Jensen, Kenneth Thorø Martinsen (2022). Environmental drivers and sources of stream oxygen consumption in an agricultural lake catchment. Ecological Engineering.

Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen, Mikkel Madsen-Østerbye, Emil Kristensen, Jonas Stage Sø (2021). Wind drives fast changes of light climate in a large, shallow re-established lake. Science of The Total Environment.

Lars Båstrup-Spohr, Jonas Stage Sø, Kenneth Thorø Martinsen, Nathalie Brandt Zak, Emil Kristensen, Theis Kragh, Martin Søndergård, Jens Borum, Kaj Sand-Jensen (2020). Vandplanternes artsrigdom og udbredelse i nye søer. Vand & Jord.

Emil Kristensen, Kaj Sand-Jensen, Theis Kragh, Kenneth Thorø Martinsen, Lars Båstrup-Spohr, Martin Søndergaard, Erik Jeppesen (2020). Fisk i nye søer. Vand & Jord.

Thomas Davidson, Kenneth Thorø Martinsen, Joachim Audet, Eti Ester Levi, Jianming Deng, Martin Søndergaard, Sara Egemose, Lars Baastrup-Spohr, Kaj Sand-Jensen (2020). Drivhusgasser fra nye søer. Vand & Jord.

Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2020). Carbon Dioxide Partial Pressure and Emission Throughout the Scandinavian Stream Network. Global Biogeochemical Cycles.

Theis Kragh, Kenneth Thorø Martinsen, Emil Kristensen, Kaj Sand-Jensen (2020). From drought to flood: Sudden carbon inflow causes whole-lake anoxia and massive fish kill in a large shallow lake. Science of the Total Environment.

Kaj Sand-Jensen, Kenneth Thorø Martinsen, Anders Lund Jakobsen, Jonas Stage Sø, Mikkel Madsen-Østerbye, Johan Emil Kjær, Emil Kristensen, Theis Kragh (2020). Large pools and fluxes of carbon, calcium and phosphorus in dense charophyte stands in ponds. Science of the Total Environment.

Emil Kristensen, Kaj Sand-Jensen, Kenneth Thorø Martinsen, Mikkel Madsen-Østerbye, Theis Kragh (2020). Fingerprinting pike: The use of image recognition to identify individual pikes. Fisheries Research.

Kenneth Thorø Martinsen, Kaj Sand-Jensen, Theis Kragh (2020). Kulstofbalancer of CO2 afgasning i danske søer og vandløb. Vand & Jord.

Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2019). Carbon dioxide efflux and ecosystem metabolism of small forest lakes. Aquatic Sciences.

Kaj Sand-Jensen, Mikkel René Andersen, Kenneth Thorø Martinsen, Jens Borum, Emil Kristensen, Theis Kragh (2019). Shallow plant-dominated lakes – extreme environmental variability, carbon cycling and ecological species challenges. Annals of Botany.

Kenneth Thorø Martinsen, Mikkel René Andersen, Kaj Sand-Jensen (2019). Water temperature dynamics and the prevalence of daytime stratification in small temperate shallow lakes. Hydrobiologia.

Mikkel René Andersen, Theis Kragh, Kenneth Thorø Martinsen, Emil Kristensen, Kaj Sand-Jensen (2019). The carbon pump supports high primary production in a shallow lake. Aquatic Sciences.

Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2019). Carbon dioxide fluxes of air-exposed sediments and desiccating ponds. Biogeochemistry.

Kenneth Thorø Martinsen, Theis Kragh, Kaj Sand-Jensen (2018). Technical note: A simple and cost-efficient automated floating chamber for continuous measurements of carbon dioxide gas flux on lakes. Biogeosciences.

Kaj Sand-Jensen, Rune Stefan Jensen, Matilde Gomes, Emil Kristensen, Kenneth Thorø Martinsen, Theis Kragh, Lars Baastrup-Spohr, Jens Borum (2018). Photosynthesis and calcification of charophytes. Aquatic Botany.

Emilie M. F. Kallenbach, Kaj Sand-Jensen, Jonas Morsing, Kenneth Thorø Martinsen, Theis Kragh, Karsten Raulund-Rasmussen, Lars Baastrup-Spohr (2018). Early ecosystem responses to watershed restoration along a headwater stream. Ecological Engineering.

Kaj Sand-Jensen, Kenneth Thorø Martinsen, Theis Kragh (2018). Varm sommer med uventede konsekvenser for vandmiljøet. Aktuel Naturvidenskab.

Kaj Sand-Jensen, Mikkel René Andersen, Theis Kragh, Emil Kristensen, Kenneth Thorø Martinsen (2018). Kalkudfældning, fotosyntese og fosforbinding hos kransnålalger i småsøer. Vand & Jord.

Kaj Sand-Jensen, Kenneth Thorø Martinsen, Theis Kragh (2018). Bedre og billigere teknologi til studier af klimagasser. Vand & Jord.

Kenneth Thorø Martinsen, Mikkel René Andersen, Theis Kragh, Kaj Sand-Jensen (2017). High rates and close diel coupling of primary production and ecosystem respiration in small, oligotrophic lakes. Aquatic Sciences.

Kenneth Thorø Martinsen, Mikkel René Andersen, Theis Kragh, Kaj Sand-Jensen (2017). Temperaturdynamik i små søer - daglig lagdeling og opblanding. Vand & Jord.

Kaj Sand-Jensen, Mikkel René Andersen, Lars Lønsmann Iversen, Theis Kragh, Kenneth Thorø Martinsen (2017). Små søer – talrige, oversete og oplagte studieobjekter . Aktuel Naturvidenskab.

Lars Baadstrup-Spohr, Kaj Sand-Jensen, Jonas Morsing, Kenneth Thorø Martinsen, Jørgen Bo Larsen, Karsten Raulund-Rasmussen (2015). Økologisk restaurering langs Øle Å med afsæt i forskningsspørgsmål og effektmålinger. Vand & Jord.