Per Juel Hansen

Per Juel Hansen

Professor


  1. 2024
  2. Published

    Cytotoxicity of Prymnesium parvum extracts and prymnesin analogs on epithelial fish gill cells RTgill‑W1 and the human colon cell line HCEC‑1CT

    Varga, E., Prause, H., Riepl, M., Hochmayr, N., Berk, D., Attakpah, E., Kiss, E., Medic, Nikola, Del Favero, G., Larsen, T. O., Hansen, Per Juel & Marko, D., 2024, In: Archives of Toxicology. 98, p. 999–1014 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  3. Published

    Impact of salinity and temperature on the vital rates of co-occurring Calanus glacialis and C. finmarchicus from West Greenland

    Makri, M., Hansen, Per Juel & Gissel Nielsen, T., 2024, In: Marine Ecology - Progress Series. 729, p. 47-62 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  4. Published

    Long-read genome sequencing provides novel insights into the harmful algal bloom species Prymnesium parvum

    Jian, J., Wu, Z., Silva-núñez, A., Li, X., Zheng, X., Luo, B., Liu, Y., Fang, X., Workman, C. T., Larsen, T. O., Hansen, Per Juel & Sonnenschein, E. C., 2024, In: Science of the Total Environment. 908, 168042.

    Research output: Contribution to journalJournal articlepeer-review

  5. 2023
  6. E-pub ahead of print

    Carbon and nitrogen uptake through photosynthesis and feeding by photosymbiotic Acantharia

    Mansour, J. S., Hansen, Per Juel, Leroux, C. & Not, F., 2023, (E-pub ahead of print) In: Open Research Europe.

    Research output: Contribution to journalJournal articlepeer-review

  7. Published

    Effects of Glacial Flour on Marine Micro-plankton: Evidences from Natural Communities of Greenlandic Fjords and Experimental Studies

    Maselli, Maira, Meire, L., Meire, P. & Hansen, Per Juel, 2023, In: Protist. 174, 1, 17 p., 125928.

    Research output: Contribution to journalJournal articlepeer-review

  8. Published

    FISH-KILLING MARINE ALGAL BLOOMS: Causative Organisms, Ichthyotoxic Mechanisms, Impacts and Mitigation

    Hallegraeff, G., Anderson, D. M., Davidson, K., Gianella , F., Hansen, Per Juel, Iwataki, M., Larsen, T. O., Hegaret, H., Mardones, J. I., MacKenzie, L. & Rensel, J. E., 2023, Unesco. 96 p.

    Research output: Book/ReportReport

  9. Published

    Local adaptation through countergradient selection in northern populations of Skeletonema marinoi

    Sefbom, J., Kremp, A., Hansen, Per Juel, Johannesson, K., Godhe, A. & Rengefors, K., 2023, In: Evolutionary Applications. 16, 2, 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  10. Published

    Microplastic pollution associated with reduced respiration in seagrass (Zostera marina L.) and associated epiphytes

    Molin, J. M., Groth-Andersen, W. E., Hansen, Per Juel, Kühl, Michael & Brodersen, Kasper Elgetti, 2023, In: Frontiers in Marine Science. 10, 14 p., 1216299.

    Research output: Contribution to journalJournal articlepeer-review

  11. Published

    Mixotrophic lifestyle of the ichthyotoxic haptophyte, Prymnesium parvum, offered different sources of phosphorus: [Inkl. Corrigendum]

    Boucher, C., Lacour, T., Julie, A., Damien, R., Hansen, Per Juel & Francis, M., 2023, In: Harmful Algae. 127, p. 1-10 10 p., 102483.

    Research output: Contribution to journalJournal articlepeer-review

  12. Published

    The Mixoplankton Database (MDB): Diversity of photo‐phago‐trophic plankton in form, function, and distribution across the global ocean

    Mitra, A., Caron, D. A., Faure, E., Flynn, K. J., Leles, S. G., Hansen, Per Juel, McManus, G. B., Not, F., Rosario Gomes, H. D., Santoferrara, L. F., Stoecker, D. K. & Tillmann, U., 2023, In: Journal of Eukaryotic Microbiology. 70, 4, 25 p.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey

    Yde Eriksen, C. S., Desmaret Walli, M., Van de Waal, D. B., Helmsing, N. R., Dahl, E. O., Sørensen, Helle & Hansen, Per Juel, 2023, In: Harmful Algae. 129, 11 p., 102509.

    Research output: Contribution to journalJournal articlepeer-review

  14. 2022
  15. Published

    Impacts of inorganic nutrients on the physiology of a mixoplanktonic ciliate and its cryptophyte prey

    Maselli, Maira, Van de Waal, D. B. & Hansen, Per Juel, 2022, In: Oecologia. 199, 1, p. 41-52 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  16. Published

    Multiple ocean stressors: a scientific summary for policy makers

    Beusen, A., Boyd, P. W., Breitburg, D., Comeau, S., Hansen, Per Juel, Isensee, K., Kudela, R. M., Lundholm, Nina, Otto, S., Schwing, F. & Tilbrook, B., 2022, Unesco. 22 p. (IOC Information Series, Vol. 1404).

    Research output: Book/ReportReportpeer-review

  17. Published

    Predator Field and Colony Morphology Determine the Defensive Benefit of Colony Formation in Marine Phytoplankton

    Ryderheim, F., Hansen, Per Juel & Kiørboe, T., 2022, In: Frontiers in Marine Science. 9, 10 p., 829419.

    Research output: Contribution to journalJournal articlepeer-review

  18. Published

    The coupling between irradiance, growth, photosynthesis and prymnesin cell quota and production in two strains of the bloom-forming haptophyte, Prymnesium parvum

    Medic, Nikola, Varga, E., van der Waal, D. B., Larsen, T. O. & Hansen, Per Juel, 2022, In: Harmful Algae. 112, 8 p., 102173.

    Research output: Contribution to journalJournal articlepeer-review

  19. Published

    The strengths and weaknesses of Live Fluorescently Labelled Algae (LFLA) to estimate herbivory in protozooplankton and mixoplankton

    Ferreira, G. D., Figueira, J., Marques, S. C., Hansen, Per Juel & Calbet, A., 2022, In: Marine Environmental Research. 174, 12 p., 105558.

    Research output: Contribution to journalJournal articlepeer-review

  20. 2021
  21. Published

    A guide for field studies and environmental monitoring of mixoplankton populations

    Mitra, A. (ed.), Gypens, N. (ed.), Hansen, Per Juel (ed.) & Flynn, K. J. (ed.), 2021, Zenodo.

    Research output: Book/ReportReport

  22. Published

    An under‑ice bloom of mixotrophic haptophytes in low nutrient and freshwater‑influenced Arctic waters

    Søgaard, D. H., Sorrell, B. K., Sejr, M. K., Andersen, P., Rysgaard, S., Hansen, Per Juel, Skyttä, A., Lemcke, S. & Lund-Hansen, L. C., 2021, In: Scientific Reports. 11, 8 p., 11:2915.

    Research output: Contribution to journalJournal articlepeer-review

  23. Published

    Development and validation of new methods for measuring predation rates in mixoplanktonic protists

    Ferreira, G. D., Calbet, A., Mansour, J. S., Not, F., Medic, Nikola, Hansen, Per Juel, Romano, F., Pitta, P., Flynn, K. J. & Mitra, A., 2021, Novel Approaches For Investigating Marine Planktonic Mixotrophy. Mitra, A., Flynn, K. J., Anestis, K., Mansour, J. S., Ferreira, G. D. & Calbet, A. (eds.). Zenodo, 69 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  24. Published

    Fjords and climate change

    Juul-Pedersen, T., Winding, M. H. S., Sejr, M. K. & Hansen, Per Juel, 2021, Greenland Ecosystem Monitoring Annual Report Cards 2020. Christensen, T. B., Arndal, M. F. & Topp-Jørgensen, E. (eds.). Aarhus University, DCE – Danish Centre for Environment and Energy, p. 8-9 2 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  25. Published

    GEM MarineBasis – Programme description

    Sejr, M. K., Winding, M. H. S., Juul-Pedersen, T., Hansen, Per Juel & Nielsen, T. G., 2021, Greenland Ecosystem Monitoring Annual Report Cards 2020. Christensen, T. R., Arndal, M. F. & Topp-Jørgensen, E. (eds.). Aarhus University, DCE – Danish Centre for Environment and Energy, p. 40-41 2 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  26. Published

    Gill Transcriptomic Responses to Toxin-producing Alga Prymnesium parvum in Rainbow Trout

    Clinton, M., Krol, E., Sepúlveda, D., Andersen, N. R., Brierley, A. S., Ferrier, D. E. K., Hansen, Per Juel, Lorenzen, N. & Martin, S. A. M., 2021, In: Frontiers in Immunology. 12, 17 p., 794593.

    Research output: Contribution to journalJournal articlepeer-review

  27. Published

    HABs under global change: Experimental conditions and approaches

    van der Waal, D. B., Bach, L., Berdalet, E., Brandenburg, K. M., Suikkanen, S., Wohlrab, S., Hansen, Per Juel & Kremp, A., 2021, Guidelines for the study of climate change effects on HABs. Enevoldsen, H. & Sun, Y. (eds.). Unesco, p. 36-63 (IOC Manual and Guides, Vol. 88).

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearchpeer-review

  28. Published

    Limits to the cellular control of sequestered cryptophyte prey in the marine ciliate Mesodinium rubrum: [incl. correction]

    Altenburger, A., Cai, H., Li, Q., Drumm, Kirstine, Kim, M., Zhu, Y., Garcia-Cuetos, L., Zhan, X., Hansen, Per Juel, John, U., Li, S. & Lundholm, Nina, 2021, In: The ISME Journal. 15, 4, p. 1056-1072 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  29. Published

    Metabolic Reliance on Photosynthesis Depends on Both Irradiance and Prey Availability in the Mixotrophic Ciliate, Strombidium cf. basimorphum

    Hughes, E. A., Maselli, Maira, Sørensen, Helle & Hansen, Per Juel, 2021, In: Frontiers in Microbiology. 12, 12 p., 642600.

    Research output: Contribution to journalJournal articlepeer-review

  30. Published

    Mixoplankton interferences in dilution grazing experiments

    Ferreira, G. D., Romano, F., Medic, Nikola, Pitta, P., Hansen, Per Juel, Flynn, K. J., Mitra, A. & Calbet, A., 2021, In: Scientific Reports. 11, 16 p., 23849.

    Research output: Contribution to journalJournal articlepeer-review

  31. Published

    Physiological Responses of Mesodinium major to Irradiance, Prey Concentration and Prey Starvation

    Drumm, Kirstine, Norlin, A., Kim, M., Altenburger, A. & Hansen, Per Juel, 2021, In: Journal of Eukaryotic Microbiology. 68, 4, 13 p., e12854.

    Research output: Contribution to journalJournal articlepeer-review

  32. Published

    Polyketide synthase genes and molecular trade-offs in the ichthyotoxic species Prymnesium parvum

    Anestis, K., Kohli, G. S., Wohlrab, S., Varga, E., Larsen, T. O., Hansen, Per Juel & John, U., 2021, In: Science of the Total Environment. 795, 10 p., 148878.

    Research output: Contribution to journalJournal articlepeer-review

  33. Published

    Retention of Prey Genetic Material by the Kleptoplastidic Ciliate Strombidium cf. basimorphum

    Maselli, Maira, Anestis, K., Klemm, K., Hansen, Per Juel & John, U., 2021, In: Frontiers in Microbiology. 12, 8 p., 694508.

    Research output: Contribution to journalJournal articlepeer-review

  34. Published

    The loss of mixotrophy in Alexandrium pseudogonyaulax: Implications for trade-offs between toxicity, mucus trap production, and phagotrophy

    Blossom, H. E. & Hansen, Per Juel, 2021, In: Limnology and Oceanography. 66, 2, p. 528-542 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  35. 2020
  36. Published

    A dataset on trophic modes of aquatic protists

    Schneider, L. K., Anestis, K., Mansour, J., Anschütz, A. A., Gypens, N., Hansen, Per Juel, John, U., Klemm, K., Martin, J. L., Medic, Nikola, Not, F. & Stolte, W., 2020, In: Biodiversity Data Journal. 8, 13 p., e56648.

    Research output: Contribution to journalJournal articlepeer-review

  37. Published

    Dimorphism in cryptophytes - The case of Teleaulax amphioxeia/Plagioselmis prolonga and its ecological implications

    Altenburger, A., Blossom, H. E., Garcia-Cuetos, L., Jakobsen, H. H., Carstensen, J., Lundholm, Nina, Hansen, Per Juel, Moestrup, Øjvind & Haraguchi, L., 2020, In: Science Advances. 6, 37, 8 p., eabb1611.

    Research output: Contribution to journalJournal articlepeer-review

  38. Published

    Dynamic CO2 and pH levels in coastal, estuarine, and inland waters: theoretical and observed effects on harmful algal blooms

    Raven, J. A., Gobler, C. J. & Hansen, Per Juel, 2020, In: Harmful Algae. 91, 13 p., 101594.

    Research output: Contribution to journalJournal articlepeer-review

  39. Published

    Ecophysiological traits of mixotrophic Strombidium spp.

    Maselli, Maira, Altenburger, A., Stoecker, D. K. & Hansen, Per Juel, 2020, In: Journal of Plankton Research. 42, 5, p. 485-496 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  40. Published

    Effects of the DSP-toxic dinoflagellate Dinophysis acuta on clearance and respiration rate of the blue mussel, Mytilus edulis

    Nielsen, P., Krock, B., Hansen, Per Juel & Vismann, B., 2020, In: P L o S One. 15, 3, 19 p., e0230176.

    Research output: Contribution to journalJournal articlepeer-review

  41. Published

    Karmitoxin production by Karlodinium armiger and the effects of K. armiger and karmitoxin towards fish

    Binzer, S. B., Varga, E., Andersen, A. J. C., Svenssen, D. K., de Medeiros, L. S., Rasmussen, S. A., Larsen, T. O. & Hansen, Per Juel, 2020, In: Harmful Algae. 99, 13 p., 101905.

    Research output: Contribution to journalJournal articlepeer-review

  42. Published

    Meteorological conditions induce strong shifts in mixotrophic and heterotrophic flagellate bacterivory over small spatio-temporal scales

    Anderson, R. & Hansen, Per Juel, 2020, In: Limnology and Oceanography. 65, 6, p. 1189–1199 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  43. Published

    Mixotrophy in Dinoflagellates: Prey Selection, Physiology and Ecological Importance

    Hansen, Per Juel & Tillmann, U., 2020, Dinoflagellates: Classification, Evolution, Physiology and Ecological Significance. Durvasula, S. R. V. (ed.). Nova Science Publishers, p. 201-260 60 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  44. 2019
  45. Published

    In situ and experimental evidence for effects of elevated pH on protistan and metazoan grazers

    Hansen, B. W., Andersen, C. M. B., Hansen, Per Juel, Nielsen, T. G., Vismann, B. & Tiselius, P., 2019, In: Journal of Plankton Research. 41, 3, p. 257–271 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  46. Published

    A-, B- and C-type prymnesins are clade specific compounds and chemotaxonomic markers in Prymnesium parvum

    Binzer, S. B., Svenssen, D. K., Daugbjerg, Niels, Alvez-de-Souza, C., Pinto, E., Hansen, Per Juel, Larsen, T. O. & Varga, E., 2019, In: Harmful Algae. 81, p. 10-17 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  47. Published

    Development of an indirect quantitation method to assess ichthyotoxic B-type prymnesins from Prymnesium parvum

    Svenssen, D. K., Binzer, S. B., Medic, Nikola, Hansen, Per Juel, Larsen, T. O. & Varga, E., 2019, In: Toxins. 11, 5, 15 p., 251.

    Research output: Contribution to journalJournal articlepeer-review

  48. Published

    Distributions of three Alexandrium species and their toxins across a salinity gradient suggest an increasing impact of GDA producing A. pseudogonyaulax in shallow brackish waters of Northern Europe

    Kremp, A., Hansen, Per Juel, Tillmann, U., Savela, H., Suikkanen, S., Voß, D., Barrera, F., Jakobsen, H. H. & Krock, B., 2019, In: Harmful Algae. 87, 14 p., 101622.

    Research output: Contribution to journalJournal articlepeer-review

  49. Published

    Mixotrophic protists and a new paradigm for marine ecology: where does plankton research go now?

    Flynn, K. J., Mitra, A., Anestis, K., Anschütz, A. A., Calbet, A., Ferreira, G. D., Gypens, N., Hansen, P. J., John, U., Martin, J. L., Mansour, J. S., Maselli, M., Medic, N., Norlin, A., Not, F., Pitta, P., Ramano, F., Saiz, E., Schneider, L. K., Stolte, W. & 1 others, Traboni, C., 2019, In: Journal of Plankton Research. 41, 4, p. 375-391 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  50. Published

    Mixotrophy among freshwater and marine protists

    Hansen, Per Juel, Anderson, R., Stoecker, D. K., Decele, J., Altenburger, A., Blossom, H. E., Drumm, Kirstine, Mitra, A. & Flynn, K. J., 2019, Encyclopedia of Microbiology. Schmidt, T. (ed.). 4 ed. Academic Press, p. 199-210

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  51. Published

    Respiratory Physiology of European Plaice (Pleuronectes platessa) Exposed to Prymnesium parvum

    Bergsson, H., Andersen, N. R., Svendsen, Morten B.S., Hansen, Per Juel & Steffensen, John Fleng, 2019, In: Fishes. 4, 2, 13 p., 32.

    Research output: Contribution to journalJournal articlepeer-review

  52. Published

    Sampling bias misrepresents the biogeographical significance of constitutive mixotrophs across global oceans

    Leles, S., Mitra, A., Flynn, K. J., Tillmann, U., Stoecker, D., Jeong, H. J., Burkholder, J., Hansen, Per Juel, Caron, D. A., Glibert, P. M., Hallegraeff, G., Raven, J. A., Sanders, R. W. & Zubkov, M., 2019, In: Global Ecology and Biogeography. 28, 4, p. 418–428 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  53. Published

    The cost of toxicity in microalgae: direct evidence from the dinoflagellate Alexandrium

    Blossom, H. E., Markussen, Bo, Daugbjerg, Niels, Krock, B., Norlin, A. & Hansen, Per Juel, 2019, In: Frontiers in Microbiology. 10, 14 p., 1065.

    Research output: Contribution to journalJournal articlepeer-review

  54. 2018
  55. Published

    The blue mussel Mytilus edulis is vulnerable to the toxic dinoflagellate Karlodinium armiger: adult filtration is inhibited and several life stages killed

    Binzer, S. B., Lundgren, R. B. C., Berge, T., Hansen, Per Juel & Vismann, B., Jun 2018, In: P L o S One. 13, 6, 16 p., e0199306.

    Research output: Contribution to journalJournal articlepeer-review

  56. Published

    Development of a LC-MS/MS method for the quantification of goniodomins A and B and its application to Alexandrium pseudogonyaulax strains and plankton field samples of Danish coastal waters

    Krock, B., Tillmann, U., Wen, Y., Hansen, Per Juel, Larsen, T. O. & Andersen, A. J. C., 2018, In: Toxicon. 155, p. 51-60 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  57. Published

    Effects of harmful algal blooms on fish: insights from Prymnesium parvum

    Svendsen, Morten B.S., Andersen, N. G., Hansen, Per Juel & Steffensen, John Fleng, 2018, In: Fishes. 3, 1, 12 p., 11.

    Research output: Contribution to journalJournal articlepeer-review

  58. Published

    Mixotrophy in chlorophytes and haptophytes: effect of irradiance, macronutrient, micronutrient and vitamin limitation

    Anderson, R., Charvet, S. & Hansen, Per Juel, 2018, In: Frontiers in Microbiology. 9, 13 p., 1704.

    Research output: Contribution to journalJournal articlepeer-review

  59. 2017
  60. Published

    HPLC-HRMS quantification of the ichthyotoxin karmitoxin from Karlodinium armiger

    Andersen, A. J. C., de Medeiros, L. S., Binzer, S. B., Rasmussen, S. A., Hansen, Per Juel, Nielsen, K. F., Jørgensen, K. & Larsen, T. O., Sep 2017, In: Marine Drugs. 15, 9, 13 p., 278.

    Research output: Contribution to journalJournal articlepeer-review

  61. Published

    Oceanic protists with different forms of acquired phototrophy display contrasting biogeographies and abundance

    Leles, S., Mitra, A., Flynn, K. J., Stoecker, D. K., Hansen, Per Juel, Calbet, A., McManus, G. B., Sanders, R. W., Caron, D. A., Not, F., Hallegraeff, G. M., Pitta, P., Raven, J. A., Johnson, M. D., Glibert, P. M. & Våge, S., 16 Aug 2017, In: Proceedings of the Royal Society B: Biological Sciences. 284, 1860, 6 p., 20170664.

    Research output: Contribution to journalJournal articlepeer-review

  62. Published
  63. Published

    Mixotrophic phytoflagellate bacterivory field measurements strongly biased by standard approaches: a case study

    Anderson, R., Jürgens, K. & Hansen, Per Juel, 26 Jul 2017, In: Frontiers in Microbiology. 8, 12 p., 1398.

    Research output: Contribution to journalJournal articlepeer-review

  64. Published

    Evolutionary transition towards permanent chloroplasts? - Division of kleptochloroplasts in starved cells of two species of Dinophysis (Dinophyceae).

    Rusterholz, P. M., Hansen, Per Juel & Daugbjerg, Niels, 11 May 2017, In: PLoS ONE. 12, 5, 16 p., e0177512.

    Research output: Contribution to journalJournal articlepeer-review

  65. Published

    Trophic cascades of bottom-up and top-down forcing on nutrients and plankton in the Kattegat, evaluated by modelling

    Petersen, M. E., Maar, M., Larsen, J., Møller, E. F. & Hansen, Per Juel, May 2017, In: Journal of Marine Systems. 169, p. 25-39 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  66. Published

    Karmitoxin: an amine containing polyhydroxy-polyene toxin from the marine dinoflagellate Karlodinium armiger

    Rasmussen, S. A., Binzer, S. B., Hoeck, C., Meier, S., Soman de Medeiros, L., Andersen, N. G., Place, A., Nielsen, K. F., Hansen, Per Juel & Larsen, T. O., 5 Apr 2017, In: Journal of Natural Products. 80, 5, p. 1287−1293 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  67. Published

    A search for mixotrophy and mucus trap production in Alexandrium spp. and the dynamics of mucus trap formation in Alexandrium pseudogonyaulax

    Blossom, H. E., Bædkel, T. D., Tillmann, U. & Hansen, Per Juel, 4 Apr 2017, In: Harmful Algae. 64, p. 51-62 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  68. Published

    Dynamics of sequestered cryptophyte nuclei in Mesodinium rubrum during starvation and refeeding

    Kim, M., Drumm, Kirstine, Daugbjerg, Niels & Hansen, Per Juel, 21 Mar 2017, In: Frontiers in Microbiology. 8, 14 p., 423.

    Research output: Contribution to journalJournal articlepeer-review

  69. Published

    Mesodinium rubrum: the symbiosis that wasn’t

    Johnson, M. D., Lasek-Nesselquist , E., Moeller, H. V., Altenburger, A., Lundholm, Nina, Kim, M., Drumm, Kirstine, Moestrup, Øjvind & Hansen, Per Juel, 14 Feb 2017, In: Proceedings of the National Academy of Sciences of the United States of America. 114, 7, p. E1040-E1042 3 p.

    Research output: Contribution to journalComment/debatepeer-review

  70. Published

    Distinctly different behavioral responses of a copepod, Temora longicornis, to different strains of toxic dinoflagellates, Alexandrium spp.

    Xu, J., Hansen, Per Juel, Nielsen, L. T., Krock, B., Tillmann, U. & Kiørboe, T., Feb 2017, In: Harmful Algae. 62, p. 1-9 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  71. Published

    Modelling succession of key resource harvesting traits of mixotrophic plankton populations

    Berge, T., Chakraborty, S., Hansen, Per Juel & Andersen, K. H., 15 Jan 2017, In: The ISME Journal. 11, p. 212–223 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  72. Published

    Mixotrophy in the marine plankton

    Stoecker, D. K., Hansen, Per Juel, Caron, D. & Mitra, A., Jan 2017, In: Annual Review of Marine Science. 9, p. 311–335 25 p.

    Research output: Contribution to journalReviewpeer-review

  73. Published

    DiskoBasis monitering

    Sigsgaard, Charlotte, Jørgensen, C. J., Christiansen, C. T., Hansen, Per Juel, Christoffersen, Kirsten Seestern, McConnell, A., Mølgaard, K. A., Kroon, Aart, Friborg, Thomas, Hansen, Birger & Elberling, Bo, 2017, Arctic Station Annual Report 2015. Kroon, A. & Sigsgaard, C. (eds.). København: Københavns Universitet, p. 7-13 7 p. (Annual Report).

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearchpeer-review

  74. Published

    Effects of elevated pH on marine copepods in mass cultivation systems: practical implications

    Hansen, B. W., Hansen, Per Juel, Nielsen, T. G. & Meyer Jepsen, P., 2017, In: Journal of Plankton Research. 39 , 6, p. 984–993 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  75. 2016
  76. Published

    Accumulation, transformation and breakdown of DSP toxins from the toxic dinoflagellate Dinophysis acuta in blue mussels, Mytilus edulis

    Nielsen, L. T., Hansen, Per Juel, Krock, B. & Vismann, B., 2016, In: Toxicon. 117, p. 84-93 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  77. Published

    Chemical diversity, origin, and analysis of phycotoxins

    Rasmussen, S. A., Andersen, A. J. C., Andersen, N. G., Nielsen, K. F., Hansen, Per Juel & Larsen, T. O., 2016, In: Journal of Natural Products. 79, 3, p. 662-673 12 p.

    Research output: Contribution to journalReviewpeer-review

  78. Published

    Chemodiversity of ladder-frame prymnesin polyethers in Prymnesium parvum

    Rasmussen, S. A., Meier, S., Andersen, N. G., Blossom, H. E., Duus, J. Ø., Nielsen, K. F., Hansen, Per Juel & Larsen, T. O., 2016, In: Journal of Natural Products. 79, 9, p. 2250–2256 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  79. Published

    Defining planktonic protist functional groups on mechanisms for energy and nutrient acquisition: incorporation of diverse mixotrophic strategies

    Mitra, A., Flynn, K. J., Tillmann, U., Raven, J. A., Caron, D., Stoecker, D. K., Hansen, P. J., Hallegraeff, G., Sanders, R., Wilken, S., Mcmanus, G., Johnson, M., Pitta, P., Våge, S., Berge, T., Calbet, A., Thingstad, F., Jeong, H. J., Burkholder, J., Glibert, P. M. & 2 others, Granéli, E. & Lundgren, V., 2016, In: Protist. 167, 2, p. 106-120 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  80. Published

    Dynamic cluster analysis: an unbiased method for identifying A + 2 element containing compounds in liquid chromatographic high-resolution time-of-flight mass spectrometric data

    Andersen, A. J. C., Hansen, Per Juel, Jørgensen, K. & Nielsen, K. F., 2016, In: Analytical Chemistry. 88 , 24, p. 12461–12469 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  81. Published

    Functional ecology of aquatic phagotrophic protists–concepts, limitations, and perspectives

    Weisse, T., Anderson, R., Arndt, H., Calbet, A., Hansen, Per Juel & Montagnes, D. J. S., 2016, In: European Journal of Protistology. 55, Part A, p. 50–74 25 p.

    Research output: Contribution to journalJournal articlepeer-review

  82. Published

    Mass entrapment and lysis of Mesodinium rubrum cells in mucus threads observed in cultures with Dinophysis

    Ojamäe, K., Hansen, Per Juel & Lips, I., 2016, In: Harmful Algae. 55, p. 77-84 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  83. Published

    Metabolic and physiological changes in Prymnesium parvum when grown under, and grazing on prey of, variable nitrogen: phosphorus stoichiometry

    Lundgren, V. M., Glibert, P. M., Graneli, E., Vidyarathna, N. K., Fiori, E., Ou, L., Flynn, K. J., Mitra, A., Stoecker, D. K. & Hansen, Per Juel, 2016, In: Harmful Algae. 55, p. 1-12 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  84. Published

    Photoregulation in a kleptochloroplastidic Dinoflagellate, Dinophysis acuta

    Hansen, Per Juel, Ojamäe, K., Berge, T., Trampe, Erik, Nielsen, L. T., Lipps, I. & Kühl, Michael, 2016, In: Frontiers in Microbiology. 7, 11 p., 785.

    Research output: Contribution to journalJournal articlepeer-review

  85. Published

    Role of the chloroplast in the predatory dinoflagellate Karlodinium armiger

    Berge, T. & Hansen, Per Juel, 2016, In: Marine Ecology - Progress Series. 549, p. 41–54 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  86. Published

    Sublethal concentrations of ichthyotoxic alga Prymnesium parvum affect rainbow trout susceptibility to viral haemorrhagic septicaemia virus

    Andersen, N. G., Lorenzen, E., Boutrup, T. S., Hansen, Per Juel & Lorenzen, N., 2016, In: Diseases of Aquatic Organisms. 117, p. 187-195 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  87. 2015
  88. Published
  89. Published

    Effect of acidification on an Arctic phytoplankton community from Disko Bay, West Greenland

    Thoisen, C., Riisgaard, K., Lundholm, Nina, Nielsen, T. G. & Hansen, Per Juel, 2015, In: Marine Ecology - Progress Series. 520, p. 21-34 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  90. Published

    Ichthyotoxicity of the microalga Pseudochattonella farcimen under laboratory and field conditions in Danish waters

    Andersen, N. G., Hansen, Per Juel, Engell-Sørensen, K., Nørremark, L. H., Andersen, P., Lorenzen, E. & Lorenzen, N., 2015, In: Diseases of Aquatic Organisms. 116, 3, p. 165-172 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  91. Published

    Impact of elevated pH on succession in the Arctic spring bloom

    Riisgaard, K., Nielsen, T. G. & Hansen, Per Juel, 2015, In: Marine Ecology - Progress Series. 530, p. 63-75 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  92. Published

    Ocean acidification with (de)eutrophication will alter future phytoplankton growth and succession

    Flynn, K. J., Darren, C. R., Mitra, A., Heiner, F., Hansen, Per Juel, Glibert, P., Wheeler, G. L., Stoecker, D. K., Blackford, J. C. & Brownlee, C., 2015, In: Proceedings of the Royal Society B: Biological Sciences. 282, 1804, 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  93. Published

    Resilience to temperature and pH changes in a future climate change scenario in six strains of the polar diatom Fragilariopsis cylindrus

    Pančić, M., Hansen, Per Juel, Tammilehto, A. & Lundholm, Nina, 2015, In: Biogeosciences. 12, p. 4235-4244 10 p., 12.

    Research output: Contribution to journalJournal articlepeer-review

  94. 2014
  95. Published

    Prymnesium parvum revisited: relationship between allelopathy, ichthyotoxicity, and chemical profiles in 5 strains

    Blossom, H. E., Rasmussen, S. A., Andersen, N. G., Larsen, T. O., Nielsen, K. F. & Hansen, Per Juel, 2014, In: Aquatic Toxicology. 157, p. 159-166 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  96. Published

    Stability of the intra- and extracellular toxins of Prymnesium parvum using a microalgal bioassay

    Blossom, H. E., Andersen, N. G., Rasmussen, S. A. & Hansen, Per Juel, 2014, In: Harmful Algae. 32, p. 11-21 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  97. Published

    The dinoflagellates Pfiesteria shumwayae and Luciella masanensis cause fish kills in recirculation fish farms in Denmark

    Moestrup, Øjvind, Hansen, Gert, Daugbjerg, Niels, Lundholm, Nina, Overton, J., Vestergård, M., Steenfeldt, S. J., Calado, A. J. & Hansen, Per Juel, 2014, In: Harmful Algae. 32, p. 33-39 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  98. Published

    The role of mixotrophic protists in the biological carbon pump

    Mitra, A., Flynn, K. J., Burkholder, J. M., Berge, T., Calbet, A., Raven, J. A., Graneli, E., Glibert, P. M., Hansen, Per Juel, Stoecker, D. K., Thingstad, F., Tillmann, U., Våge, S. & Zubkov, M. V., 2014, In: Biogeosciences. 11, p. 995-1005 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  99. 2013
  100. Published

    Acquired phototrophy in Mesodinium and Dinophysis – a review of cellular organization, prey selectivity, nutrient uptake and bioenergetics

    Hansen, Per Juel, Nielsen, L. T., Johnson, M., Berge, T. & Flynn, K. J., 2013, In: Harmful Algae. 28, p. 126-139 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  101. Published

    Cutting the canopy to defeat the “selfish gene”; conflicting selection pressures for the integration of phototrophy in mixotrophic protists

    Flynn, K. J. & Hansen, Per Juel, 2013, In: Protist. 164, 6, p. 811-823 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  102. Published

    Loss of phototaxis and degeneration of an eyespot in long-term algal cultures: evidence from ultrastructure and behaviour in the dinoflagellate Kryptoperidinium foliaceum

    Moldrup, M., Moestrup, Øjvind & Hansen, Per Juel, 2013, In: Journal of Eukaryotic Microbiology. 60, 4, p. 327–334 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  103. Published

    Misuse of the phytoplankton-zooplankton dichotomy: the need to assign organisms as mixotrophs within plankton functional types

    Flynn, K. J., Stoecker, D. K., Mitra, A., Raven, J. A., Glibert, P. M., Hansen, Per Juel, Granéli, E. & Burkholder, J. M., 2013, In: Journal of Plankton Research. 35, 1, p. 3-11 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  104. Published

    Production and excretion of okadaic acid, pectenotoxin-2 and a novel dinophysistoxin from the DSP-causing marine dinoflagellate Dinophysis acuta – effects of light, food availability and growth phase

    Nielsen, L. T., Krock, B. & Hansen, Per Juel, 2013, In: Harmful Algae. 23, p. 34-45 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  105. Published

    Using nuclear-encoded LSU and SSU rDNA sequences to identify the Eukaryotic Endosymbiont in Amphisolenia bidentata (Dinophyceae)

    Daugbjerg, Niels, Jensen, M. H. & Hansen, Per Juel, 2013, In: Protist. 164, 3, p. 411-422 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  106. 2012
  107. Published

    Direct evidence for symbiont sequestration in the marine red tide ciliate Mesodinium rubrum

    Hansen, Per Juel, Moldrup, M., Tarangkoon, W., Garcia, L. & Moestrup, Øjvind, 2012, In: Aquatic Microbial Ecology. 66, 1, p. 63-75 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  108. Published

    Effects of experimental seawater acidification on an estuarine plankton community

    Nielsen, L. T., Hallegraeff, G., Wright, S. & Hansen, Per Juel, 2012, In: Aquatic Microbial Ecology. 65, 3, p. 271-285 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  109. Published

    Effects of light and food availability on toxin production, growth and photosynthesis in Dinophysis acuminata

    Nielsen, L. T., Krock, B. & Hansen, Per Juel, 2012, In: Marine Ecology - Progress Series. 471, p. 37-50 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  110. Published

    Isolation and cultivation of microalgae select for low growth rate and tolerance to high pH

    Berge, T., Daugbjerg, Niels & Hansen, Per Juel, 2012, In: Harmful Algae. 20, p. 101-110 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  111. Published

    Marine microalgae attack and feed on metazoans

    Berge, T., Poulsen, L. K., Moldrup, M., Daugbjerg, Niels & Hansen, Per Juel, 2012, In: I S M E Journal. 6, p. 1926-1936 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  112. Published

    Studies on the genus Mesodinium I: ultrastructure and description of Mesodinium chamaeleon n.sp., a benthic marine species with green and red chloroplasts

    Moestrup, Øjvind, Garcia-Cuetos, L., Hansen, Per Juel & Fenchel, Tom, 2012, In: Journal of Eukaryotic Microbiology. 59, 1, p. 20-39 20 p.

    Research output: Contribution to journalJournal articlepeer-review

  113. Published

    Studies on the genus Mesodinium II. ultrastructural and molecular investigations of five marine species help clarifying the taxonomy

    Garcia, L., Moestrup, Øjvind & Hansen, Per Juel, 2012, In: Journal of Eukaryotic Microbiology. 59, 4, p. 374-400 27 p.

    Research output: Contribution to journalJournal articlepeer-review

  114. Published

    The fish-killing dictyochophyte Pseudochattonella farcimen

    Jakobsen, R. K., Hansen, Per Juel, Daugbjerg, Niels & Andersen, N. G., 2012, In: Harmful Algae. 18, p. 84-95 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  115. Published

    Toxic mucus traps: a novel mechanism that mediates prey uptake in the mixotrophic dinoflagellate Alexandrium pseudogonyaulax

    Blossom, H. E., Daugbjerg, Niels & Hansen, Per Juel, 2012, In: Harmful Algae. 17, p. 40-53 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  116. Published

    Use of phytoplankton pigments in estimating food selection of three marine copepods

    Christensen, B., Jonasdottir, S., Henriksen, P. & Hansen, Per Juel, 2012, In: Journal of Plankton Research. 34, 2, p. 161-172 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  117. 2011
  118. Published

    Feeding on copepod fecal pellets: a new trophic role of dinoflagellates as detritivores.

    Poulsen, L., Moldrup, M., Berge, T. & Hansen, Per Juel, 2011, In: Marine Ecology - Progress Series. 441, p. 65–78 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  119. Published

    Growth limitation of three Arctic sea ice algal species: effects of salinity, pH, and inorganic carbon availability

    Sogaard, D. H., Hansen, Per Juel, Rysgaard, S. & Glud, R. N., 2011, In: Polar Biology. 34, 8, p. 1157-1165 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  120. Published

    Prey selection, ingestion and growth responses of the common marine ciliate Mesodinium pulex in the light and in the dark

    Tarangkoon, W. & Hansen, Per Juel, 2011, In: Aquatic Microbial Ecology. 62, 1, p. 25-38 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  121. Published

    The role of photosynthesis and food uptake for the growth of marine mixotrophic dinoflagellates

    Hansen, Per Juel, 2011, In: Journal of Eukaryotic Microbiology. 58, 3, p. 203-214 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  122. 2010
  123. Published

    High resilience of two coastal plankton communities to 21st century seawater acidification: Evidence from microcosm studies.

    Nielsen, L. T., Jakobsen, H. H. & Hansen, Per Juel, 1 Oct 2010, In: Marine Biology Research. 6, 6, p. 542-555 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  124. Published

    Autotrophic and heterotrophic activity in Arctic first-year sea ice: seasonal study from Malene Bight, SW Greenland

    Søgaard, D. H., Kristensen, M., Rysgaard, S., Glud, R. N., Hansen, Per Juel & Hillingsøe, K. M., 2010, In: Marine Ecology - Progress Series. 419, p. 31-45 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  125. Published

    Effects of lowered pH on marine phytoplankton growth rates.

    Berge, T., Daugbjerg, Niels, Andersen, B. B. & Hansen, Per Juel, 2010, In: Marine Ecology - Progress Series. 416, p. 79-91 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  126. Published

    High resilience of two coastal plankton communities to twenty-first century seawater acidification: Evidence from microcosm studies

    Nielsen, L. T., Jakobsen, H. H. & Hansen, Per Juel, 2010, In: Marine Biology Research. 6, 6, p. 542-555 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  127. Published

    Putative N2-fixing heterotrophic bacteria associated with dinoflagellate-Cyanobacteria consortia in the low-nitrogen Indian Ocean

    Farnelid, H., Tarangkoon, W., Hansen, Gert, Hansen, Per Juel & Riemann, Lasse, 2010, In: Aquatic Microbial Ecology. 61, 2, p. 105-117 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  128. Published

    Spatial distribution of symbiont-bearing dinoflagellates in the Indian Ocean in relation to oceanographic regimes

    Tarangkoon, W., Hansen, Gert & Hansen, Per Juel, 2010, In: Aquatic Microbial Ecology. 58, 2, p. 197-213 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  129. Published

    The toxic dinoflagellate Dinophysis acuminata harbors permanent chloroplasts of cryptomomad prigin, not kleptochloroplasts

    Garcia, L., Moestrup, Øjvind, Hansen, Per Juel & Daugbjerg, Niels, 2010, In: Harmful Algae. 9, 1, p. 25-38 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  130. 2009
  131. Published

    Role of food uptake for photosynthesis, growth and survival of the mixotrophic dinoflagellate Dinophysis acuminata

    Riisgaard, K. & Hansen, Per Juel, 17 Apr 2009, In: Marine Ecology - Progress Series. 381, p. 51-62 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  132. Published

    Allelopathic effects of Alexandrium tamarense on other algae: evidence from mixed growth experiments

    Tillmann, U. & Hansen, Per Juel, 2009, In: Aquatic Microbial Ecology. 57, 1, p. 101-112 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  133. Published

    Does the red tide ciliate Mesodinium rubrum have replaceable symbionts

    Tarangkoon, W., Hansen, Per Juel, Moldrup, M., Garcia, L., Daugbjerg, Niels & Moestrup, Øjvind, 2009, In: Phycologia. 4, p. 40-40 1 p.

    Research output: Contribution to journalConference abstract in journal

  134. Published

    Novel type of eukaryotic endosymbiont in Amphisolenia bidentata identified using ribosomal gene sequence determinations

    Daugbjerg, Niels, Jensen, M. H. & Hansen, Per Juel, 2009, In: Phycologia. 4, p. 24-24 1 p.

    Research output: Contribution to journalConference abstract in journal

  135. 2008
  136. Published

    Prey size spectrum and bioenergetics of the mixotrophic dinoflagellate Karlodinium armiger

    Berge, T., Hansen, Per Juel & Moestrup, Øjvind, 26 Mar 2008, In: Aquatic Microbial Ecology. 50, p. 289-299

    Research output: Contribution to journalJournal articlepeer-review

  137. Published

    High reproduction, but low biomass: mortality estimates of the copepod Acartia tonsa in a hyper-eutrophic estuary

    Tiselius, P., Borg, C. M. A., Hansen, B. W., Hansen, Per Juel, Nielsen, T. G. & Vismann, B., 2008, In: Aquatic Biology. 2, p. 93-103

    Research output: Contribution to journalJournal articlepeer-review

  138. Published

    Inorganic carbon acquisition in potentially toxic and non-toxic diatoms: the effect of pH-induced changes in the seawater carbonate chemistry.

    Trimborn, S., Lundholm, Nina, Thoms, S., Richter, K., Hansen, Per Juel, Krock, B. & Rost, B., 2008, In: Physiologia Plantarum : An International Journal for Plant Biology. 133, 1, p. 92-105 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  139. Published

    Struktur og funktion af plankton fødekæden i det Indiske Ocean fra Cape Town til Broome iAustralien. Dansk Ekspeditionsfond 2008

    Nielsen, T. G., Visser, A., Jonasdottir, S., Friis Møller, E., Andersen, M., Larsen, L., Søborg, B., Satapoomin, S., Jaspers, C., Markager, S., Middelboe, M., Martinsen, W., Berendt, A., Hansen, O. S., Hansen, P. J., Woraporn, T., Daugbjerg, N., Hansen, G., Hastrup Jensen, M., Jakobsen, H. H. & 4 others, Henriksen, P., Schlüter, L., Hilligsøe, K. M. & Olesen, Michael, 2008.

    Research output: Contribution to conferencePaperResearchpeer-review

  140. Published

    The chloroplast of the DSP-producer Dinophysis, does it originate from Mesodinium, Teleaulax or elsewhere?

    Garcia, L., Hansen, Per Juel, Daugbjerg, Niels & Moestrup, Øjvind, 2008. 1 p.

    Research output: Contribution to conferenceConference abstract for conferenceResearch

  141. 2007
  142. Published

    Growth limitation due to high pH and low inorganic carbon concentrations in temperate species of the dinoflagellate genus Ceratium

    Søderberg, L. M. & Hansen, Per Juel, 6 Dec 2007, In: Marine Ecology Progress Series. 351, p. 103-112 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  143. Published

    Dinoflagellate/cyanobacteria consortia in the tropical Indian Ocean and the North-West Australian Sea

    Tarangkoon, W., Hansen, Gert & Hansen, Per Juel, 2007, In: Journal of Phycology. suppl 1, p. 38-38 1 p.

    Research output: Contribution to journalConference abstract in journal

  144. Published

    Direct effects of pH and inorganic carbon on macroalgal photosynthesis and growth

    Middelboe, A. L. & Hansen, Per Juel, 2007, In: Marine Biology Research. 3, 3, p. 134-144

    Research output: Contribution to journalJournal articlepeer-review

  145. Published

    Does irradiance influence the tolerance of marine phytoplankton to high pH?

    Nielsen, L. T., Lundholm, Nina & Hansen, Per Juel, 2007, In: Marine Biology Research. 3, 6, p. 446-453

    Research output: Contribution to journalJournal articlepeer-review

  146. Published

    Growth limitation due to high pH and low inorganic carbon concentrations in temperate species of the dinoflagellate genus Ceratium

    Søderberg, L. M. & Hansen, Per Juel, 2007, In: Marine Ecology - Progress Series. 351, p. 103-112

    Research output: Contribution to journalJournal articlepeer-review

  147. Published

    Growth limitation in marine red-tide dinoflagellates: effects of pH versus inorganic carbon availability

    Hansen, Per Juel, Lundholm, Nina & Rost, B., 2007, In: Marine Ecology - Progress Series. 334, p. 63-71

    Research output: Contribution to journalJournal articlepeer-review

  148. Published

    High pH in shallow-water macroalgal habitats

    Middelboe, A. L. & Hansen, Per Juel, 2007, In: Marine Ecology - Progress Series. 338, p. 107-117

    Research output: Contribution to journalJournal articlepeer-review

  149. Published

    Interaction between Mesodinium rubrum and its prey: importance of prey concentration, irradiance and pH

    Moldrup, M. & Hansen, Per Juel, 2007, In: Marine Ecology - Progress Series. 338, p. 61-70 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  150. Published

    Interactions among marine protists: importance of mixotrophy, pH and toxins

    Hansen, Per Juel, 2007, In: Journal of Phycology. supl 1, p. 13-14 2 p.

    Research output: Contribution to journalConference abstract in journal

  151. 2006
  152. Published

    Allelopathy in Harmful Algae: A Mechanism to Compete for Resources?

    Granéli, E. & Hansen, Per Juel, 2006, Ecology of Harmful Algae: Series: Ecological Studies Vol. 189.. 189 ed. Heidelberg: Springer, p. 189-202 (Ecological Studies, Vol. 189).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  153. Published

    Book Reviews: Coastal Plankton - Photoguide for European Seas by Otto Larink & Wilfried Westheide

    Hansen, Per Juel, 2006, In: Marine Biology Research. 2, 1, p. 76

    Research output: Contribution to journalLiterature review

  154. Published

    Effects of dietary fatty acids on the reproductive success of the calanoid copepod Temora longicornis (vol 146, pg 513, 2005)

    Arendt, K., Jonasdottir, S. H., Hansen, Per Juel & Gartner, S., 2006, In: Marine Biology.

    Research output: Contribution to journalJournal articlepeer-review

  155. Published

    Exploring strategies for nanoflagellates living in a 'wet desert'

    Boenigk, J., Pfandl, K. & Hansen, Per Juel, 2006, In: Aquatic Microbial Ecology. 44, p. 71-83

    Research output: Contribution to journalJournal articlepeer-review

  156. Published

    High pH and not allelopathy may be responsible for negative effects of Nodularia spumigena on other algae

    Møgelhøj, M. K., Hansen, Per Juel, Henriksen, P. & Lundholm, Nina, 2006, In: Aquatic Microbial Ecology. 43, p. 43-54

    Research output: Contribution to journalJournal articlepeer-review

  157. Published

    Inorganic carbon acquisition in red tide dinoflagellates

    Rost, B., Richter, K., Riebesell, U. & Hansen, Per Juel, 2006, In: Plant, Cell and Environment. 29, p. 810-822

    Research output: Contribution to journalJournal articlepeer-review

  158. Published

    Motile behaviour of the bloom-forming ciliate Mesodinium rubrum

    Fenchel, Tom & Hansen, Per Juel, 2006, In: Marine Biology Research. 2, 1, p. 33-40

    Research output: Contribution to journalJournal articlepeer-review

  159. Published

    Net growth of the bloom-forming dinoflagellate Heterocapsa triquetra and pH: why turbulence matters.

    Havskum, H. & Hansen, Per Juel, 2006, In: Aquatic Microbial Ecology. 42, p. 55-62

    Research output: Contribution to journalJournal articlepeer-review

  160. Published

    The bloom-forming ciliate Mesodinium rubrum harbours a single permanent endosymbiont

    Hansen, Per Juel & Fenchel, Tom, 2006, In: Marine Biology Research. 2, 3, p. 169-177

    Research output: Contribution to journalJournal articlepeer-review

  161. 2005
  162. Published

    Effect of turbulence on sedimentation and net population growth of the dinoflagellate Ceratium tripos and interactions with its predator, Fragilidium subglobosum

    Havskum, H., Hansen, Per Juel & Berdalet, E., 1 Jan 2005, In: Limnology and Oceanography. 50, 5, p. 1543-1551 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  163. Published

    Effect of turbulence on sedimentation and net population growth of the dinoflagellate Ceratium tripos and interactions with its predator, Fragilidium subglosum

    Havskum, H., Hansen, Per Juel & Berdalet, E., 2005, In: Limnology and Oceanography. 50(5), p. 1543-1551

    Research output: Contribution to journalJournal articlepeer-review

  164. Published

    Effects of diatary fatty acids on the reproductive success of the calanoid copepod Temora longicornis

    Arendt, K. E., Jónasdóttir, S. H., Hansen, Per Juel & Gartner, S., 2005, In: Marine Biology. 146, 3, p. 513-530

    Research output: Contribution to journalJournal articlepeer-review

  165. Published

    Lack of allelopathic effects of the domoic acid-producing marine diatom Pseudo-nitzschia multiseries

    Lundholm, Nina, Hansen, Per Juel & Kotaki, Y., 2005, In: Marine Ecology - Progress Series. 288, p. 21-33

    Research output: Contribution to journalJournal articlepeer-review

  166. 2004
  167. Published

    Andaman Sea copepods: spatio-temporal variations in biomass and production, and role in the pelagic food web.

    Satapoomin, S., Nielsen, T. G. & Hansen, Per Juel, 2004, In: Marine Ecology - Progress Series. 274, p. 99-122

    Research output: Contribution to journalJournal articlepeer-review

  168. Published

    Assemblages of fish larvae and mesozooplankton across the continental shelf and shelf slope of the Andaman Sea (NE Indian Ocean).

    Munk, P., Bjørnsen, P. K., Boonruang, P., Fryd, M., Hansen, Per Juel, Janekarn, V., Limtrakulvong, V., Nielsen, T. G., Hansen, O. S., Satapoomin, S., Sawangarreruks, S., Thomsen, H. A. & Østergaard, J. B., 2004, In: Marine Ecology - Progress Series. 274, p. 87-97

    Research output: Contribution to journalJournal articlepeer-review

  169. Published

    Effect of pH on growth and domoic acid production by potentially toxic diatoms of the genera Pseudo-nitzschia and Nitzschia.

    Lundholm, Nina, Hansen, Per Juel & Kotaki, Y., 2004, In: Marine Ecology - Progress Series. 273, p. 1-15

    Research output: Contribution to journalJournal articlepeer-review

  170. Published

    Green Noctiluca scintillans: a dinoflagellate with its own greenhouse.

    Hansen, Per Juel, Miranda, L. & Azanza, R., 2004, In: Marine Ecology - Progress Series. 275, p. 79-87

    Research output: Contribution to journalJournal articlepeer-review

  171. Published

    Hydrography, bacteria and protist communities across the continental shelf and shelf slope of the Andaman Sea (NE Indian Ocean).

    Nielsen, T. G., Bjørnsen, P. K., Boonruang, P., Fryd, M., Hansen, Per Juel, Janekarn, V., Limtrakulvong, V., Munk, P., Hansen, O. S., Satapoomin, S., Sawangarreuks, S., Thomsen, H. A. & Østergaard, J. B., 2004, In: Marine Ecology - Progress Series. 274, p. 69-86

    Research output: Contribution to journalJournal articlepeer-review

  172. 2003
  173. Published

    Effects of high pH on a natural marine planktonic community

    Pedersen, M. F. & Hansen, Per Juel, 2003, In: Marine Ecology - Progress Series. 260, p. 19-31

    Research output: Contribution to journalJournal articlepeer-review

  174. Published

    Effects of high pH on the growth and survival of six marine heterotrophic protists.

    Pedersen, M. F. & Hansen, Per Juel, 2003, In: Marine Ecology - Progress Series. 260, p. 33-41

    Research output: Contribution to journalJournal articlepeer-review

  175. Published

    Effects of nutrient limitation on food uptake in the toxic haptophyte Prymnesium parvum.

    Skovgaard, A., Legrand, C., Hansen, Per Juel & Granéli, E., 2003, In: Aquatic Microbial Ecology. 31, p. 259-265

    Research output: Contribution to journalJournal articlepeer-review

  176. Published

    Food uptake in the harmful alga Prymnesium parvum mediated by excreted toxins

    Skovgaard, A. & Hansen, Per Juel, 2003, In: Limnology and Oceanography. 48(3), p. 1161-1166

    Research output: Contribution to journalJournal articlepeer-review

  177. 2002
  178. Published

    Effect of high pH on the growth and survival of marine phytoplankton: implications for species succession

    Hansen, Per Juel, 2002, In: Aquatic Microbial Ecology. 28, p. 279-288

    Research output: Contribution to journalJournal articlepeer-review

  179. Published

    Growth and grazing responses of Chrysochromulina ericina (Prymnesiophyceae): the role of irradiance, prey concentration and pH

    Hansen, Per Juel & Hjorth, M., 2002, In: Marine Biology. 141, p. 975-983

    Research output: Contribution to journalJournal articlepeer-review

  180. Published

    Toxin-mediated feeding in the harmful alga Prymnesium parvum

    Skovgaard, A. & Hansen, Per Juel, 2002.

    Research output: Contribution to conferenceConference abstract for conferenceResearch

  181. 2001
  182. Published

    Allelopathy in the prymnesiophyte Chrysochromulina polylepis: effect of cell concentration, growth phase and pH

    Schmidt, L. E. & Hansen, Per Juel, 2001, In: Marine Ecology - Progress Series. 216, p. 67-81

    Research output: Contribution to journalJournal articlepeer-review

  183. 2000
  184. Published

    Physiology of the mixotrophic dinoflagellate Fragilidium subglobosum. II. Effects of time scale and prey concentration on photosynthetic performance

    Hansen, Per Juel, Skovgaard, A., Glud, R. N. & Stoecker, D. K., 9 Aug 2000, In: Marine Ecology Progress Series. 201, p. 137-146 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  185. Published

    Growth and grazing responses of two chloroplast-retaining dinoflagellates:effect of irradiance and prey species

    Jakobsen, H. H., Hansen, Per Juel & Larsen, Jacob, 2000, In: Marine Ecology - Progress Series. 201, p. 121-128

    Research output: Contribution to journalJournal articlepeer-review

  186. Published

    Physiology of the mixotrophic dinoflagellate Fragilidium subglobosum. I. Effects of phagotrophy and irradiance on photosynthesis and carbon content

    Skovgaard, A., Hansen, Per Juel & Stoecker, D. K., 2000, In: Marine Ecology - Progress Series. 201, p. 129-136

    Research output: Contribution to journalJournal articlepeer-review

  187. Published

    Physiology of the mixotrophic dinoflagellate Fragilidium subglosum. II. Effects of time scale and prey concentration on photosynthetic performance

    Hansen, Per Juel, Skovgaard, A., Glud, R. N. & Stoecker, D. K., 2000, In: Marine Ecology - Progress Series. 201, p. 137-146

    Research output: Contribution to journalJournal articlepeer-review

  188. 1999
  189. Published

    Meeting report: Third European Congress of Protistology and 9th European Congress on Ciliate Biology, Helsingor, Denmark, July 26-30, 1999

    Hansen, Per Juel & Leick, V., 1 Jan 1999, In: Protist. 150, 3, p. 225-228 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  190. Published

    Dyreplankton i danske farvande (Tema-rapport DMU 28)

    Nielsen, T. G. & Hansen, Per Juel, 1999, National Environmental Research Institute. 64 p. (Tema-rapport).

    Research output: Book/ReportReport

  191. Published
  192. Published

    Phagotrophic Mechanisms and Prey Selection in Free-living Dinoflagellates

    Hansen, Per Juel & Calado, A. J., 1999, In: Journal of Eukaryotic Microbiology. 46(4), p. 328-389

    Research output: Contribution to journalJournal articlepeer-review

  193. 1998
  194. Published

    Interactions Between Toxic Marine Phytoplankton and Metazoan and Protistan Grazers

    Hansen, Per Juel, Tester, P. A. & Turner, J. T., 1998, In: NATO SGI. Ser. G 41, p. 453-473

    Research output: Contribution to journalJournal articlepeer-review

  195. Published

    Phagotropic Mechanisms and Prey Selection in Mixotropic Phytoflagellates

    Hansen, Per Juel, 1998, In: NATO ASI Series. G 41, p. 527-537

    Research output: Contribution to journalJournal articlepeer-review

  196. 1997
  197. Published

    Zooplankton grazing and growth: Scaling within the 2-2,000-μm body size range

    Hansen, Per Juel, Bjørnsen, P. K. & Hansen, B. W., 1 Jan 1997, In: Limnology and Oceanography. 42, 4, p. 687-704 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  198. Published

    Mixotrophic feeding of Fragilidium subglobosum (Dinophyceae) on three species of Ceratium: Effects of prey concentration, prey species and light intensity

    Hansen, Per Juel & Nielsen, T. G., 1997, In: Marine Ecology - Progress Series. 147, p. 187-196

    Research output: Contribution to journalJournal articlepeer-review

  199. Published

    Prey size selection, grazing and growth response of the small heterotrophic dinoflagellate Gymnodinium sp. and the ciliate Balanion comatum - a comparative study

    Jakobsen, H. H. & Hansen, Per Juel, 1997, In: Marine Ecology Progress Series. 158, 1, p. 75-86 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  200. Published

    Prey size selection, grazing and growth response of the small heterotrophic dinoflagellate Gymnodinium sp. and the ciliate Balanion comatum - a comparatiteve study

    Jakobsen, H. H. & Hansen, Per Juel, 1997, In: Marine Ecology - Progress Series. 158, p. 75-86

    Research output: Contribution to journalJournal articlepeer-review

  201. Published

    Zooplanktion grazing and growth: Scaling within the 2-2,000-um body size range

    Hansen, Per Juel, Bjørnsen, P. K. & Hansen, B. W., 1997, In: Limnology and Oceanography. 42 (4), p. 687-704

    Research output: Contribution to journalJournal articlepeer-review

  202. 1995
  203. Published

    Distribution and growth of protists and mesozooplankton during a bloom of Chrysochromulina spp. (Prymnesiophyceae, Prymnesiales)

    Hansen, Per Juel, Nielsen, T. G. & Kaas, H., 1995, In: Phycologia. 34 (5), p. 409-416

    Research output: Contribution to journalJournal articlepeer-review

  204. Published

    Giftige alger og algeblomstringer i danske farvande

    Hansen, Per Juel, 1995, In: Naturligvis. 1995, p. 22-24

    Research output: Contribution to journalJournal article

  205. Published

    Growth and grazing response of a ciliate feeding on the red tide dinoflagellate Gyrodinium aureolum in monoculture and in mixture with a non-toxic alga

    Hansen, Per Juel, 1995, In: Marine Ecology - Progress Series. 121, p. 65-72

    Research output: Contribution to journalJournal articlepeer-review

  206. Published

    Microbial diversity and activity in a Danish fjord with anoxic deep water

    Fenchel, Tom, Bernard, C., Esteban, G., Finlay, B. J., Hansen, Per Juel & Iversen, N., 1995, In: Marine Biology Research. 43(1), p. 45-100

    Research output: Contribution to journalJournal articlepeer-review

  207. 1994
  208. Published

    Opblomstring af stilkalger i Storebælt

    Hansen, Per Juel, Nielsen, T. G. & Kaas, H., 1994, In: Vand og Jord. 1. årg., nr. 2, p. 8-13

    Research output: Contribution to journalJournal article

  209. Published

    The size ratio between planktonic predators and their prey

    Hansen, B., Bjørnsen, P. K. & Hansen, Per Juel, 1994, In: Limnology and Oceanography. 39 (2), p. 395-403

    Research output: Contribution to journalJournal articlepeer-review

  210. 1993
  211. Published

    Havforskning fra Miljøstyrelsen, Giftige alger i danske farvande

    Larsen, J., Hansen, Per Juel & Ravn, H., 1993, Miljøstyrelsen. 130 p.

    Research output: Book/ReportReport

  212. 1992
  213. Published

    Prey. size selection, feeding rates and growth dynamics of heterotrophic dinoflagellates with special emphasis on Gyrodinium spirale

    Hansen, Per Juel, 1992, In: Marine Biology. 114, p. 327-334

    Research output: Contribution to journalJournal articlepeer-review

  214. Published

    The marine dinoflagellate Alexandrium ostenfeldii: paralytic shellfish toxin concentration, composition, and toxicity to a tintinnid ciliate

    Hansen, Per Juel, Cembella, A. D. & Moestrup, Øjvind, 1992, In: Journal of Phycology. 28, p. 597-603

    Research output: Contribution to journalJournal articlepeer-review

  215. 1991
  216. Published

    DINOPHYSIS - a planktonic dinoflagellate genus which can act both as a prey and a predator of a ciliate

    Hansen, Per Juel, 1991, In: Marine Ecology - Progress Series. 69 (1&2), p. 201-204

    Research output: Contribution to journalJournal articlepeer-review

  217. Published

    Effects of large nongrazable particles on clearance and swimming behaviour of zooplankton

    Hansen, B., Hansen, Per Juel & Nielsen, T. G., 1991, In: Journal of Experimental Marine Biology and Ecology. 152(2), p. 145-288

    Research output: Contribution to journalJournal articlepeer-review

  218. Published

    Quantitative importance and trophic role of heterotrophic dinoflagellates in a coastal pelagial food web

    Hansen, Per Juel, 1991, In: Marine Ecology - Progress Series. 73, p. 253-61

    Research output: Contribution to journalJournal articlepeer-review

  219. 1989
  220. Published

    The red tide dinoflagellate Alexandrium tamarense: effects on behaviour and growth of a tintinnid ciliate

    Hansen, Per Juel, 1989, In: Marine Ecology - Progress Series. 53, p. 105-116

    Research output: Contribution to journalJournal articlepeer-review

  221. 1988
  222. Published

    On the occurrence of the potentially toxic dinoflagellates Alexandrium tamarense (=Gonyaulax excavata) and Alexandrium ostenfeldii in Danish and Faroese waters

    Moestrup, Ø. & Hansen, Per Juel, 1988, In: Marine Biology Research. 28, p. 195-213

    Research output: Contribution to journalJournal articlepeer-review

ID: 10120