Kaj Sand-Jensen

Kaj Sand-Jensen

Professor


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  1. 2024
  2. Published

    Hourly methane and carbon dioxide fluxes from temperate ponds

    Sø, Jonas Stage, Martinsen, K. T., Kragh, T. & Sand-Jensen, Kaj, 2024, In: Biogeochemistry. 167, p. 177-195 19 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    Water quality in a shallow eutrophic lake is unaffected by extensive thinning of planktivorous and benthivorous fish species

    Polauke, E., Sø, Jonas Stage, Carl, Henrik, Møller, Peter Rask, Reitzel, K., Sand-Jensen, Kaj & Kragh, T., 2024, In: Journal of Environmental Management. 356

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. 2023
  5. Published

    Environmental predictors of lake fish diversity across gradients in lake age and spatial scale

    Martinsen, K. T., Kristensen, E., Båstrup-Spohr, Lars, Søndergaard, M., Carl, Henrik, Jeppesen, E., Sand-Jensen, Kaj & Kragh, T., 2023, In: Freshwater Biology. 68, 7, 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Methane and carbon dioxide fluxes at high spatiotemporal resolution from a small temperate lake

    Sø, Jonas Stage, Sand-Jensen, Kaj, Martinsen, K. T., Polauke, E., Kjær, Johan Emil, Reitzel, K. & Kragh, T., 2023, In: Science of the Total Environment. 878, 11 p., 162895.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    Predicting lake bathymetry from the topography of the surrounding terrain using deep learning

    Martinsen, K. T., Sand-Jensen, Kaj & Selvan, Raghav, 2023, In: Limnology and Oceanography: Methods. 21, 10, p. 625-636

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. 2022
  9. Published

    Ecosystem Metabolism and Gradients of Temperature, Oxygen and Dissolved Inorganic Carbon in the Littoral Zone of a Macrophyte-Dominated Lake

    Martinsen, K. T., Zak, N. B., Båstrup-Spohr, Lars, Kragh, T. & Sand-Jensen, Kaj, 2022, In: Journal of Geophysical Research: Biogeosciences. 127, 12, 15 p., e2022JG007193.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Environmental drivers and sources of stream oxygen consumption in an agricultural lake catchment

    Sø, Jonas Stage, Kragh, T., Sand-Jensen, Kaj & Martinsen, K. T., 2022, In: Ecological Engineering. 176, 11 p., 106516.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Photosynthesis, growth, and distribution of plants in lowland streams — A synthesis and new data analyses of 40 years research

    Sand-Jensen, Kaj, Riis, T. & Martinsen, K. T., 2022, In: Freshwater Biology. 67, 7, p. 1255-1271 17 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Physiological Adaptation and Plant Distribution along a Steep Hydrological Gradient

    Sand-Jensen, Kaj, Borum, Jens, Møller, C. L. & Båstrup-Spohr, Lars, 2022, In: Plants. 11, 13, 12 p., 1683.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    Predicting water quality from geospatial lake, catchment, and buffer zone characteristics in temperate lowland lakes

    Martinsen, K. T. & Sand-Jensen, Kaj, 2022, In: Science of the Total Environment. 851, 12 p., 158090.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Removal of chromophoric dissolved organic matter under combined photochemical and microbial degradation as a response to different irradiation intensities

    Kragh, T., Sand-Jensen, Kaj, Kristensen, E., Pedersen, Ole & Madsen-Østerbye, M., 2022, In: Journal of Environmental Sciences. 118, p. 76-86

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Stream-Lake Connectivity Is an Important Control of Fluvial CO2 Concentrations and Emissions in Catchments

    Sand-Jensen, Kaj, Riis, T., Kjær, Johan Emil & Martinsen, K. T., 2022, In: Earth and Space Science. 9, 12, 12 p., e2022EA002664.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Wind drives fast changes of light climate in a large, shallow re-established lake

    Martinsen, K. T., Kragh, T., Sand-Jensen, Kaj, Madsen-Østerbye, M., Kristensen, E. & Sø, Jonas Stage, 2022, In: Science of the Total Environment. 806, 3, 11 p., 151354.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. 2021
  18. Published

    Optimal physical design in a new lake for reducing phosphorus pools

    Sø, Jonas Stage, Sand-Jensen, Kaj & Kragh, T., 1 Mar 2021, In: Ecological Engineering. 161, 11 p., 106160.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Century-long records reveal shifting challenges to seagrass recovery

    Krause-Jensen, D., Duarte, C. M., Sand-Jensen, Kaj & Carstensen, J., 2021, In: Global Change Biology. 27, 3, p. 563-575 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Drier, darker and more fertile: 140 years of plant habitat change driven by land-use intensification

    Nielsen, T. F., Sand-Jensen, Kaj & Bruun, Hans Henrik, 2021, In: Journal of Vegetation Science. 32, 4, 16 p., e13066.

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    Large pools and fluxes of carbon, calcium and phosphorus in dense charophyte stands in ponds

    Sand-Jensen, Kaj, Martinsen, K. T., Jakobsen, A. L., Sø, Jonas Stage, Madsen-Østerbye, M., Kjær, J. E., Kristensen, E. & Kragh, T., 2021, In: Science of the Total Environment. 765, 12 p., 142792.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. 2020
  23. Published

    Carbon Dioxide Partial Pressure and Emission Throughout the Scandinavian Stream Network

    Martinsen, K. T., Kragh, T. & Sand-Jensen, Kaj, 2020, In: Global Biogeochemical Cycles. 34, 12, 14 p., e2020GB006703.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Carbon dioxide efflux and ecosystem metabolism of small forest lakes

    Martinsen, K. T., Kragh, T. & Sand-Jensen, Kaj, 2020, In: Aquatic Sciences. 82, 17 p., 9.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Early fish colonization and community development in a shallow re-established lake

    Kristensen, E., Sand-Jensen, Kaj, Kristensen, J. S. B., Pedersen, M. E., Båstrup-Spohr, Lars & Kragh, T., 2020, In: Ecological Engineering. 155, 9 p., 105956.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    Fingerprinting pike: the use of image recognition to identify individual pikes

    Kristensen, E., Sand-Jensen, Kaj, Martinsen, K. T., Madsen-Østerbye, M. & Kragh, T., 2020, In: Fisheries Research. 229, 8 p., 105622.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    From drought to flood: Sudden carbon inflow causes whole-lake anoxia and massive fish kill in a large shallow lake

    Kragh, T., Martinsen, K. T., Kristensen, E. & Sand-Jensen, Kaj, 2020, In: Science of the Total Environment. 739, 12 p., 140072.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    Nye søer - borgerinteresse, økologi og biodiversitet

    Sand-Jensen, Kaj, 2020, In: Vand & Jord. 27, 4, p. 118-121

    Research output: Contribution to journal › Editorial › Research

  29. Published

    Temporal development of biodiversity of macrophytes in newly established lakes

    Sø, Jonas Stage, Sand-Jensen, Kaj & Båstrup-Spohr, Lars, 2020, In: Freshwater Biology. 65, 3, p. 379-389

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. 2019
  31. Published

    Carbon dioxide fluxes of air-exposed sediments and desiccating ponds

    Martinsen, K. T., Kragh, T. & Sand-Jensen, Kaj, 2019, In: Biogeochemistry. 144, 2, p. 165-180

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    Catchment properties and the photosynthetic trait composition of freshwater plant communities

    Iversen, L. L., Winkel, A., Baastrup-Spohr, L., Hinke, A. B., Alahuhta, J., Baattrup-Pedersen, A., Birk, S., Brodersen, P., Chambers, P. A., Ecke, F., Feldmann, T., Gebler, D., Heino, J., Jespersen, T. S., Moe, S. J., Riis, T., Sass, L., Vestergaard, O., Maberly, S. C., Sand-jensen, K. & 1 others, Pedersen, Ole, 2019, In: Science. 366, 6467, p. 878-881 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Inorganic carbon promotes photosynthesis, growth, and maximum biomass of phytoplankton in eutrophic water bodies

    Hammer, K. J., Kragh, T. & Sand-Jensen, Kaj, 2019, In: Freshwater Biology. 64, 11, p. 1956-1970 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Long-term influence of hay-cutting on plant species richness, biodiversity and soil fertility in a Danish fen

    Sand-Jensen, Kaj, Jørgensen, H. & Larsen, J. R., 2019, In: Ecological Engineering. 134, p. 93-100

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    More is less: net gain in species richness, but biotic homogenization over 140 years

    Nielsen, T. F., Sand-Jensen, Kaj, Dornelas, M. & Bruun, Hans Henrik, 2019, In: Ecology Letters. 22, 10, p. 1650-1657 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Published

    Sexual conflict and intrasexual polymorphism promote assortative mating and halt population differentiation

    Iversen, Lars Lønsmann, Svensson, E. I., Christensen, S. T., Bergsten, J. & Sand-Jensen, Kaj, 2019, In: Proceedings of the Royal Society B: Biological Sciences. 286, 1899, 8 p., 2019.0251.

    Research output: Contribution to journal › Journal article › Research › peer-review

  37. Published

    Shallow plant-dominated lakes - extreme environmental variability, carbon cycling and ecological species challenges

    Sand-Jensen, Kaj, Andersen, M. R., Martinsen, K. T., Borum, Jens, Kristensen, E. & Kragh, T., 2019, In: Annals of Botany. 124, 3, p. 355-366

    Research output: Contribution to journal › Review › Research › peer-review

  38. Published

    The carbon pump supports high primary production in a shallow lake

    Andersen, M. R., Kragh, T., Martinsen, K. T., Kristensen, E. & Sand-Jensen, Kaj, 2019, In: Aquatic Sciences. 81, 2, p. 1-11 24.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. Published

    Virkelighedstjek i forskningen

    Sand-Jensen, Kaj, 2019, In: Aktuel Naturvidenskab. 1, p. 2

    Research output: Contribution to journal › Comment/debate › Research

  40. Published

    Water temperature dynamics and the prevalence of daytime stratification in small temperate shallow lakes

    Martinsen, K. T., Andersen, M. R. & Sand-Jensen, Kaj, 2019, In: Hydrobiologia. 826, 1, p. 247-262

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. 2018
  42. Published

    The Dangers of Being a Small, Oligotrophic and Light Demanding Freshwater Plant across a Spatial and Historical Eutrophication Gradient in Southern Scandinavia

    Sand-Jensen, Kaj, Bruun, Hans Henrik, Nielsen, T. F., Christiansen, D. M., Hartvig, P., Schou, J. C. & Båstrup-Spohr, Lars, 2 Feb 2018, In: Frontiers in Plant Science. 9, 14 p., 66.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    A simple and cost-efficient automated floating chamber for continuous measurements of carbon dioxide gas flux on lakes

    Martinsen, K. T., Kragh, T. & Sand-Jensen, Kaj, 2018, In: Biogeosciences. 15, 18, p. 5565-5573

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. Published

    Adaptation and growth performance of four endangered amphibious freshwater species

    Mørk, O., Kragh, T., Kristensen, E. & Sand-Jensen, Kaj, 2018, In: Aquatic Botany. 150, p. 16-22

    Research output: Contribution to journal › Journal article › Research › peer-review

  45. Published

    Carbon limitation of lake productivity

    Kragh, T. & Sand-Jensen, Kaj, 2018, In: Proceedings of the Royal Society B: Biological Sciences. 285, 1891, p. 1-9 1415.

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    Coupled UV-exposure and microbial decomposition improves measures of organic matter degradation and light models in humic lake

    Madsen-Østerbye, M., Kragh, T., Pedersen, Ole & Sand-Jensen, Kaj, 2018, In: Ecological Engineering. 118, p. 191-200 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  47. Published

    Early ecosystem responses to watershed restoration along a headwater stream

    Kallenbach, E. M. F., Sand-Jensen, Kaj, Morsing, J., Martinsen, K. T., Kragh, T., Raulund-Rasmussen, Karsten & Båstrup-Spohr, Lars, 2018, In: Ecological Engineering. 116, p. 154-162 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. Published

    Five decades of dramatic changes in submerged vegetation in Lake Constance

    Murphy, F., Schmieder, K., Båstrup-Spohr, Lars, Pedersen, Ole & Sand-Jensen, Kaj, 2018, In: Aquatic Botany. 144, p. 31-37 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    High temperatures cause reduced growth, plant death and metabolic changes in eelgrass Zostera marina

    Hammer, K. J., Borum, Jens, Hasler-Sheetal, H., Shields, E. C., Sand-Jensen, Kaj & Moore, K. A., 2018, In: Marine Ecology Progress Series. 604, p. 121-132

    Research output: Contribution to journal › Journal article › Research › peer-review

  50. Published

    Karaktertræk hos planter i nye danske søer: Kort review

    Sand-Jensen, Kaj, Rasmussen, N. M., Sø, Jonas Stage & Båstrup-Spohr, Lars, 2018, In: Flora og Fauna. 124, 1-2, p. 44-50 7 p.

    Research output: Contribution to journal › Review › Research › peer-review

  51. Published

    Photosynthesis and calcification of charophytes

    Sand-Jensen, Kaj, Jensen, R. S., Gomes, M., Kristensen, E., Martinsen, K. T., Kragh, T., Båstrup-Spohr, Lars & Borum, Jens, 2018, In: Aquatic Botany. 149, p. 46-51

    Research output: Contribution to journal › Journal article › Research › peer-review

  52. 2017
  53. Published

    Fast phosphorus loss by sediment resuspension in a re-established shallow lake on former agricultural fields

    Kragh, T., Sand-Jensen, Kaj, Petersen, K. & Kristensen, E., Nov 2017, In: Ecological Engineering. 108, Part A, p. 2-9 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  54. Published

    Recovery of lake vegetation following reduced eutrophication and acidification

    Båstrup-Spohr, Lars, Sand-Jensen, Kaj, Olesen, S. C. H. & Bruun, Hans Henrik, Nov 2017, In: Freshwater Biology. 62, 11, p. 1847-1857 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  55. Published

    High rates and close diel coupling of primary production and ecosystem respiration in small, oligotrophic lakes

    Martinsen, K. T., Andersen, M. R., Kragh, T. & Sand-Jensen, Kaj, Oct 2017, In: Aquatic Sciences. 79, 4, p. 995-1007 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  56. Published

    Decade-long time delays in nutrient and plant species dynamics during eutrophication and re-oligotrophication of Lake Fure 1900–2015

    Sand-Jensen, Kaj, Bruun, Hans Henrik & Båstrup-Spohr, Lars, May 2017, In: Journal of Ecology. 105, 3, p. 690-700 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  57. Published

    Profound daily vertical stratification and mixing in a small, shallow, wind-exposed lake with submerged macrophytes

    Andersen, M. R., Sand-Jensen, Kaj, Woolway, R. I. & Jones, I. D., Apr 2017, In: Aquatic Sciences. 79, 2, p. 395-406 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  58. Published

    Time-restricted flight ability influences dispersal and colonization rates in a group of freshwater beetles

    Iversen, Lars Lønsmann, Rannap, R., Briggs, L. & Sand-Jensen, Kaj, Feb 2017, In: Ecology and Evolution. 7, 3, p. 824-830 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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