Per Juel Hansen

2020

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

Raven, J. A., Gobler, C. S. & Hansen, P. J., Jan 2020, In: Harmful Algae.

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

24 Citations (Scopus)

2019

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

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

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

9 Citations (Scopus)

58 Downloads (Pure)

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

Svenssen, D. K., Binzer, S. B., Medic, N., Hansen, P. J., Larsen, T. O. & Varga, E., May 2019, In: Toxins. 11, 5, 15 p., 251.

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

1 Citation (Scopus)

14 Downloads (Pure)

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, P. J., Tillmann, U., Savela, H., Suikkanen, S., Voß, D., Barrera, F., Jakobsen, H. H. & Krock, B., Jul 2019, In: Harmful Algae. 87, 14 p., 101622.

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

4 Citations (Scopus)

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

Hansen, B. W., Andersen, C. M. B., Hansen, P. J., Nielsen, T. G., Vismann, B. & Tiselius, P., 31 May 2019, In: Journal of Plankton Research. 41, 3, p. 257–271 15 p.

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

2 Citations (Scopus)

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

Anderson, R. & Hansen, P. J., 27 Sept 2019, (Accepted/In press) In: Limnology and Oceanography Letters.

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

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 othersTraboni, C., 26 Jul 2019, In: Journal of Plankton Research. 41, 4, p. 375-391 17 p.

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

25 Citations (Scopus)

Mixotrophy among freshwater and marine protists

Hansen, P. J., Anderson, R., Stoecker, D. K., Decele, J., Altenburger, A., Blossom, H. E., Drumm, K., Mitra, A. & Flynn, K. J., 1 Jan 2019, Encyclopedia of Microbiology. Schmidt, T. (ed.). 4 ed. Academic Press, p. 199-210

Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

1 Citation (Scopus)

Plant are not animals and animals are not plants, right? Wrong! Tiny creatures in the ocean can do both at once

Glibert, P. M., Mitra, A., Flynn, K. J., Hansen, P. J., Jeong, H. J. & Stoecker, D. K., 28 Mar 2019, In: Frontiers for Young Minds. 7, p. 1-8 8 p., 47.

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

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

Bergsson, H., Andersen, N. R., Svendsen, M. B. S., Hansen, P. J. & Steffensen, J. F., 2019, In: Fishes. 4, 2, 13 p., 32.

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

1 Citation (Scopus)

11 Downloads (Pure)

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, P. J., Caron, D. A., Glibert, P. M., Hallegraeff, G., Raven, J. A., Sanders, R. W. & Zubkov, M., Apr 2019, In: Global Ecology and Biogeography. 28, 4, p. 418–428 11 p.

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

16 Citations (Scopus)

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

Blossom, H. E., Markussen, B., Daugbjerg, N., Krock, B., Norlin, A. & Hansen, P. J., 2019, In: Frontiers in Microbiology. 10, 14 p., 1065.

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

7 Citations (Scopus)

20 Downloads (Pure)

2018

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, P. J., Larsen, T. O. & Andersen, A. J. C., 1 Dec 2018, In: Toxicon. 155, p. 51-60 10 p.

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

9 Citations (Scopus)

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

Svendsen, M. B. S., Andersen, N. G., Hansen, P. J. & Steffensen, J. F., 2018, In: Fishes. 3, 1, 12 p., 11.

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

14 Citations (Scopus)

47 Downloads (Pure)

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

Anderson, R., Charvet, S. & Hansen, P. J., 29 Mar 2018, In: Frontiers in Microbiology. 9, 13 p., 1704.

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

18 Citations (Scopus)

67 Downloads (Pure)

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, P. J. & Vismann, B., Jun 2018, In: P L o S One. 13, 6, 16 p., e0199306.

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

6 Citations (Scopus)

81 Downloads (Pure)

2017

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, P. J., 1 Apr 2017, In: Harmful Algae. 64, p. 51-62 12 p.

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

6 Citations (Scopus)

Det farveløse plankton

Hansen, P. J., 2017, Naturen i Danmark: Havet. Sand-Jensen, K. & Fenchel, T. (eds.). 2 ed. København: Gyldendal, p. 93-125 32 p.

Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

Det grønne plankton

Hansen, P. J., 2017, Naturen i Danmark: Havet. Sand-Jensen, K. & Fenchel, T. (eds.). 2 ed. Gyldendal, p. 71-91 21 p.

Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

DiskoBasis monitering

Sigsgaard, C., Jørgensen, C. J., Christiansen, C. T., Hansen, P. J., Christoffersen, K. S., McConnell, A., Mølgaard, K. A., Kroon, A., Friborg, T., Hansen, B. & Elberling, B., 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 proceeding › Report chapter › Research › peer-review

372 Downloads (Pure)

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

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

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

11 Citations (Scopus)

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

Kim, M., Drumm, K., Daugbjerg, N. & Hansen, P. J., 21 Mar 2017, In: Frontiers in Microbiology. 8, 14 p., 423.

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

15 Citations (Scopus)

62 Downloads (Pure)

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

Hansen, B. W., Hansen, P. J., Nielsen, T. G. & Meyer Jepsen, P., 1 Nov 2017, In: Journal of Plankton Research. 39 , 6, p. 984–993 10 p.

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

11 Citations (Scopus)

Effects of irradiance and prey deprivation on growth, cell carbon and photosynthetic activity of the freshwater kleptoplastidic dinoflagellate Nusuttodinium (= Gymnodinium) aeruginosum (Dinophyceae)

Drumm, K., Liebst-Olsen, M., Daugbjerg, N., Moestrup, Ø. & Hansen, P. J., 1 Aug 2017, In: PLoS ONE. 12, 8, 13 p., e0181751.

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

1 Citation (Scopus)

81 Downloads (Pure)

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

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

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

8 Citations (Scopus)

215 Downloads (Pure)

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, P. J., Nielsen, K. F., Jørgensen, K. & Larsen, T. O., Sept 2017, In: Marine Drugs. 15, 9, 13 p., 278.

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

5 Citations (Scopus)

145 Downloads (Pure)

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, P. J. & Larsen, T. O., 26 May 2017, In: Journal of Natural Products. 80, 5, p. 1287−1293 7 p.

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

23 Citations (Scopus)

35 Downloads (Pure)

Mesodinium rubrum: the symbiosis that wasn’t

Johnson, M. D., Lasek-Nesselquist, E., Moeller, H. V., Altenburger, A., Lundholm, N., Kim, M., Drumm, K., Moestrup, Ø. & Hansen, P. J., 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 journal › Comment/debate › Research › peer-review

3 Citations (Scopus)

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

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

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

19 Citations (Scopus)

50 Downloads (Pure)

Mixotrophy in the marine plankton

Stoecker, D. K., Hansen, P. J., Caron, D. & Mitra, A., 3 Jan 2017, In: Annual Review of Marine Science. 9, p. 311–335 25 p.

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

174 Citations (Scopus)

Modelling succession of key resource harvesting traits of mixotrophic plankton populations

Berge, T., Chakraborty, S., Hansen, P. J. & Andersen, K. H., 1 Jan 2017, In: The ISME Journal. 11, p. 212–223 12 p.

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

25 Citations (Scopus)

58 Downloads (Pure)

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

Leles, S., Mitra, A., Flynn, K. J., Stoecker, D. K., Hansen, P. J., 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 journal › Journal article › Research › peer-review

27 Citations (Scopus)

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, P. J., 1 May 2017, In: Journal of Marine Systems. 169, p. 25-39 15 p.

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

9 Citations (Scopus)

2016

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

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

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

22 Citations (Scopus)

Chemical diversity, origin, and analysis of phycotoxins

Rasmussen, S. A., Andersen, A. J. C., Andersen, N. G., Nielsen, K. F., Hansen, P. J. & Larsen, T. O., 25 Mar 2016, In: Journal of Natural Products. 79, 3, p. 662-673 12 p.

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

27 Citations (Scopus)

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, P. J. & Larsen, T. O., 23 Sept 2016, In: Journal of Natural Products. 79, 9, p. 2250–2256 7 p.

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

23 Citations (Scopus)

70 Downloads (Pure)

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 othersGranéli, E. & Lundgren, V., 1 Apr 2016, In: Protist. 167, 2, p. 106-120 15 p.

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

143 Citations (Scopus)

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, P. J., Jørgensen, K. & Nielsen, K. F., 20 Dec 2016, In: Analytical Chemistry. 88 , 24, p. 12461–12469 9 p.

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

10 Citations (Scopus)

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

Weisse, T., Anderson, R., Arndt, H., Calbet, A., Hansen, P. J. & Montagnes, D. J. S., 1 Aug 2016, In: European Journal of Protistology. 55, Part A, p. 50–74 25 p.

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

46 Citations (Scopus)

57 Downloads (Pure)

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

Ojamäe, K., Hansen, P. J. & Lips, I., 1 May 2016, In: Harmful Algae. 55, p. 77-84 8 p.

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

12 Citations (Scopus)

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, P. J., 1 May 2016, In: Harmful Algae. 55, p. 1-12 12 p.

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

14 Citations (Scopus)

Photoregulation in a kleptochloroplastidic Dinoflagellate, Dinophysis acuta

Hansen, P. J., Ojamäe, K., Berge, T., Trampe, E. C. L., Nielsen, L. T., Lipps, I. & Kühl, M., 2016, In: Frontiers in Microbiology. 7, 11 p., 785.

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

22 Citations (Scopus)

82 Downloads (Pure)

Role of the chloroplast in the predatory dinoflagellate Karlodinium armiger

Berge, T. & Hansen, P. J., 10 May 2016, In: Marine Ecology - Progress Series. 549, p. 41–54 14 p.

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

9 Citations (Scopus)

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, P. J. & Lorenzen, N., 13 Jan 2016, In: Diseases of Aquatic Organisms. 117, p. 187-195 9 p.

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

2 Citations (Scopus)

2015

A comparison of photosynthesis measurements by O₂ evolution, ¹⁴C assimilation and variable chlorophyll fluorescence during light acclimatization of the diatom Coscinodiscus granii

Trampe, E. C. L., Hansen, P. J. & Kühl, M., 1 Jun 2015, In: Algae. 30, 2, p. 103-119 17 p.

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

4 Citations (Scopus)

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

Thoisen, C., Riisgaard, K., Lundholm, N., Nielsen, T. G. & Hansen, P. J., 3 Feb 2015, In: Marine Ecology - Progress Series. 520, p. 21-34 14 p.

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

25 Citations (Scopus)

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

Andersen, N. G., Hansen, P. J., Engell-Sørensen, K., Nørremark, L. H., Andersen, P., Lorenzen, E. & Lorenzen, N., 27 Oct 2015, In: Diseases of Aquatic Organisms. 116, 3, p. 165-172 8 p.

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

10 Citations (Scopus)

Impact of elevated pH on succession in the Arctic spring bloom

Riisgaard, K., Nielsen, T. G. & Hansen, P. J., 18 Jun 2015, In: Marine Ecology - Progress Series. 530, p. 63-75 13 p.

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

4 Citations (Scopus)

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

Flynn, K. J., Darren, C. R., Mitra, A., Heiner, F., Hansen, P. J., 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 journal › Journal article › Research › peer-review

41 Citations (Scopus)

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

Pančić, M., Hansen, P. J., Tammilehto, A. & Lundholm, N., 20 Jul 2015, In: Biogeosciences. 12, p. 4235-4244 10 p., 12.

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

22 Citations (Scopus)

843 Downloads (Pure)

Per Juel Hansen

Research output

Search results