Hjem
Jorun Karin Egges bilde

Jorun Karin Egge

Professor
  • E-postJorun.Egge@uib.no
  • Telefon+47 55 58 44 84+47 913 92 469
  • Besøksadresse
    Thormøhlensgt. 53 A/B
  • Postadresse
    Postboks 7803
    5020 Bergen
Vitenskapelig artikkel
  • 2020. Reproducing the virus-to-copepod link in Arctic mesocosms using host fitness optimization. Limnology and Oceanography.
  • 2020. High CO2 concentration and iron availability determine the metabolic inventory in an Emiliania huxleyi-dominated phytoplankton community. Environmental Microbiology. 3863-3882.
  • 2018. Seasonal and annual variability in the phytoplankton community of the Raunefjord, west coast of Norway from 2001-2006. Marine Biology Research. 421-435.
  • 2018. Increased CO2 and iron availability effects on carbon assimilation and calcification on the formation of Emiliania huxleyi blooms in a coastal phytoplankton community. Environmental and Experimental Botany. 47-58.
  • 2018. Bacterial community composition responds to changes in copepod abundance and alters ecosystem function in an Arctic mesocosm study. The ISME Journal. 2694-2705.
  • 2017. Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010. Marine Chemistry. 1-12.
  • 2017. Iron availability modulates the effects of future CO2 levels within the marine planktonic food web. Marine Ecology Progress Series. 17-33.
  • 2017. Dampened copepod-mediated trophic cascades in a microzooplankton-dominated microbial food web: A mesocosm study. Limnology and Oceanography. 1031-1044.
  • 2016. Papposphaera obpyramidalis (Haptophyta, Papposphaeraceae):New findings from both Polar Regions. Revue de Micropaleontologie. 267-273.
  • 2016. Papposphaera heldalii sp. nov. (Haptophyta, Papposphaeraceae) from Svalbard. Acta Protozoologica. 27-32.
  • 2016. Confirming the "rapid phosphorus transfer from microorganisms to mesozooplankton in the eastern mediterranean sea" scenario through a mesocosm experiment. Journal of Plankton Research. 502-521.
  • 2015. Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model. Limnology and Oceanography. 360-374.
  • 2013. Elemental stoichiometry of marine particulate matter measured by wavelength dispersive X-ray fluorescence (WDXRF) spectroscopy. Journal of the Marine Biological Association of the United Kingdom. 2003-2014.
  • 2011. Organic carbon and mineral nutrient limitation of oxygen consumption, bacterial growth and efficiency in the Norwegian Sea. Polar Biology. 871-882.
  • 2010. Effects of small-scale turbulence on lower trophic levels under different nutrient conditions. Journal of Plankton Research. 197-208.
  • 2010. Effects of nutrients and turbulence on the production of transparent exopolymer particles: a mesocosm study. Marine Ecology Progress Series. 57-69.
  • 2009. Relationship between phosphate affinities and cell size and shape in various bacteria and phytoplankton. Aquatic Microbial Ecology. 311-320.
  • 2009. Primary production during nutrient-induced blooms at elevated CO2 concentrations. Biogeosciences. 877-885.
  • 2008. Effects of increased atmospheric CO2 on small and intermediate sized osmotrophs during a nutrient induced phytoplankton bloom. Biogeosciences. 739-748.
  • 2008. Counterintuitive carbon-to-nutrient coupling in an Arctic pelagic ecosystem. Nature. 387-391.
  • 2008. Build-up and decline of organic matter during PeECE III. Biogeosciences. 707-718.
  • 2007. Primary production during nutrient-induced blooms at elevated CO2 concentrations. Biogeosciences Discussions. 4385-4410.
  • 2007. Build-up and decline of organic matter during PeECE III. Biogeosciences Discussions. 4539-4570.
  • 2006. Effects of turbulence on TEP dynamics under contrasting nutrient conditions: implications for aggregation and sedimentation processes. Marine Ecology Progress Series. 47-57.
  • 2005. Use of non-limiting substrates to increase size; a generic strategy to simultaneously optimize uptake and minimize predation in pelagic osmotrophs? Ecology Letters.
  • 2001. Population dynamics and diversity of phytoplankton, bacteria and viruses in a seawater enclosure. Marine Ecology Progress Series. 47-57.
  • 2001. Microbial population dynamics and diversity during a bloom of the marine coccolithophorid Emiliania huxleyi (Haptophyta). Marine Ecology Progress Series. 39-46.
  • 1998. The hydrography and biology of a bloom of the coccolithophorid Emiliania huxleyi in the northern North Sea. Journal of Sea Research. 255-266.
  • 1997. Influence of silicate addition on vertical flux of particulate biogenic matter. Marine Pollution Bulletin. 10-210.
  • 1996. Production of DMSP and DMS during a mesocosm study of an Emiliania huxleyi bloom: influence of bacteria and Calanus finmarchicus grazing. Marine Biology. 609-618.
  • 1995. Effects of increased concentration of nitrate and phosphate during a springbloom experiment in mesocosm. Journal of Experimental Marine Biology and Ecology. 239-251.
  • 1995. Ecological modelling in coastal waters: Towards predictive physical -chemical-biological simulation models. Ophelia : International Journal of Marine Biology. 5-36.
  • 1994. The 1992 Norwegian Emiliania huxley experiment. An overview. Sarsia. 285-290.
  • 1994. Standing stocks of PIC, POC, PON and Emiliania huxleyi coccospheres and liths in seawather enclosures with different phosphate loadings. Sarsia. 307-317.
  • 1994. Representation of Emiliania huxleyi in phytoplankton simulation models. A first approach. Sarsia. 291-300.
  • 1994. Primary productivity and calification rate in blooms of the coccolithophorid Emiliania huxleyi Lohmann (Hay et Mohler) developing in mesocosms. Sarsia. 401-408.
  • 1994. Blooms of phytoplankton including Emiliania huxleyi (Haptophyta). Effects of nutrient supply in different N:P ratios. Sarsia. 333-348.
  • 1993. Viral mortality of the marine algae Emiliania huxleyi (Haptophyceae) and termination of algal blooms. Marine Ecology Progress Series. 39-48.
  • 1993. Viral mortality of the marine alga Emiliania huxleyi (Haptophyceae) and termination of algal blooms. Marine Ecology Progress Series. 39-48.
  • 1993. A model system approach to biological climate forcing. The example of Emiliania huxleyi. Global and Planetary Change. 27-46.
  • 1992. Silicate as regulating nutrient in phytoplankton competition. Marine Ecology Progress Series. 281-289.
  • 1991. A theoretical model for nutrient uptake in phytoplankton. Marine Ecology Progress Series. 65-72.
Rapport
  • 1994. Summary of data from enclosure experiments on phytoplankton blooms at Espegrend in 1986-1993. 36. 36. .
  • 1993. Kartlegging av Prymnesium parvum og giftige vannmasser ved hjelp av faste stasjoner i Hylsfjorden, Saudafjorden og Sandsfjorden. .
  • 1993. Eksperimentelle og teoretiske studier av artssuksesjon i planteplanktonoppblomstringer. .
  • 1992. Prymnesium parvum i Ryfylkefjordene. Delprosjekt 5: Kartlegging av P. Parvum og giftige vannmasser ved hjelp av faste stasjoner i Hylsfjorden, Saudafjorden og Sandsfjorden. .
  • 1991. Undersøkelser at Prymnesium parvum i Ryfylkefjordene 1991. SMR Rapport 1/91. Delrapport 7. .
Vitenskapelig foredrag
  • 2017. Microbial Food web structure in a changing Arctic.
  • 2015. INTERACT - interaksjoner mellom miljøfaktorer: pelagiske og bentiske habitat.
  • 2013. Diversity and dynamics of marine haptophytes and their viruses.
  • 2012. When Si and glucose give neither diatoms nor bacteria. A zooplankton effect in an Arctic ecosystem?
  • 2012. Senescent Cyanea capillata jellyfish may contribute to increased autumnal production: A mesocosm study.
  • 2011. Interactions between eutrophication, oil and contaminants in marine ecosystems.
  • 2010. Interactions between eutrophication, oil and contaminants in marine ecosystems.
  • 2010. Ecosystem driver pertubations summer 2009.
  • 2008. Increased level of CO2 in the ecosphere may modify the structure of marine plankton.
  • 2000. Diversity and succession of algae, virus and bacteria in nutrient enriched seawater enclosures.
  • 1993. Norwegian Ehux Mesocosm experiment 1993.
  • 1993. Ecological modelling of coastal waters.
Hovedfagsoppgave
  • 2005. Fødeopptak hos blåskjell (Mytilus edulis). Selektivitet og effektivitet ved ulik fødetilgang.
Mastergradsoppgave
  • 2006. Effect of ammonium addition and irradiance manipulation on dynamics of micriorganims. A mesocosm study.
Doktorgradsavhandling
  • 2017. Phytoplankton in a dynamic marine environment: insights from composition and dynamics studies in the Raunefjord (Western Norway).
  • 1994. Nutrient control of phytoplankton growth. Effects of macronutrient composition (N. P. Si) on species succession.
Poster
  • 2014. Jellyfish boost pelagic productivity.
  • 2010. Pelagic Community Response to Multiple Anthropogenic Stressors (BO45B-13).
  • 2005. TURBULENCE STIMULATED UPTAKE OF PHOSPHATE IN LARGE PHYTOPLANKTON.
  • 2004. Pelagic Ecosystems in a High CO2 Ocean: the Mesocosm Approach.
  • 2000. Where do all the nutrients go ?
  • 1999. Effects of increasing mesozooplankton concentrations on the phytoplan kton community in mesocosms.
  • 1995. Viral control of algal blooms?
Vitenskapelig oversiktsartikkel/review
  • 2018. Simple models combining competition, defence and resource availability have broad implications in pelagic microbial food webs. 1440-1452.

Se fullstendig oversikt over publikasjoner i CRIStin.

 

1.      Larsen A, Egge JK, Nejstgaard JC, Di Capua I, Thyrhaug R, Bratbak G,  Thingstad TF, (2015) Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model. Limnol. Oceanogr. 00, 1–262.      Paulino, A.I. , Heldal, M., Norland, S., Egge, J.K. (2013). Elemental stoichiometry of marine particulate matter measured by wavelength dispersive X-ray fluorescence (WDXRF) spectroscopy. J. Mar. Biol. Assoc. U. K., doi:10.1017/S0025315413000635, 93: 2003-2014, 3.      Cuevas, L.A., Egge, J.K., Thingstad, T.F., Töpper, B (2011) Organic carbon and mineral nutrient limitation of oxygen consumption, bacterial growth and efficiency in the Norwegian Sea. Polar Biology 34: 871-882.4.       Pedrotti, F. Peters, S. Beauvais, M. Vidal, J. Egge, A. Jacobsen, C. Marrasé (2010).The effects of nutrients and turbulence on  the production of transparent exopolymer particles: a mesocosm study. Mar. Ecol. Progress. Ser.  419   Pages: 57-69   DOI: 10.3354/meps08840  

5.      Iversen, KR, Primicerio R, Larsen A, Egge JK, Peters F, Guadayol Ó, Jacobsen A, Havskum H, Marrasé C (2010) Effects of small-scale turbulence on lower trophic levels under different nutrient conditions. Accepted in J. Plank. Res, 32, 197-208

6.      Tambi H, Fonnes Flaten GA, Egge JK, Bødker G, Jacobsen A, Thingstad TF. (2009). Relationship between phosphate affinities and cell size in varius bacteria and phytoplankton.Aquat Microb Ecol57: 311–320

7.      Thingstad,  TF, Bellerby RGJ, Bratbak G, Børsheim KY, Egge JK, Heldal M, Larsen A, Neill C, Nejstgaard J, Norland S, Sandaa R-A, Skjoldal EF, Tanaka T, Thyrhaug R, Töpper B (2008). Counterintuitive carbon-to-nutrient coupling in an Arctic pelagic ecosystem. doi:10.1038/nature07235, Nature, 455, 387-390

8.      Egge, JK, Thingstad TF, Larsen A,Engel A, Bellerby RGJ, & Riebesell U. Primary production during nutrient –induced blooms at elevated CO2 concentrations. Biogeosciences, 6, 877–885, 2009

9.      Paulino, AI, Egge JK, Larsen A. Effects of increased atmospheric CO2 on small and intermediate sized osmotrophs during a nutrient indused phytoplankton bloom. Submitted to Biogeoscience.  Biogeosciences, 5, 739-748, 2008

10.Schulz, K, Riebesell, U, Bellerby, RGJ, Biswas,  Meyerhöfer,  HM, Müller, MN,  Egge, JK, Nejstgaard, JC, Neill, C, Wohlers, J & Zöllner, E..Build-up and decline of organic matter during PeECE.  Biogeosciences, 5, 707-718, 2008

11.  Beauvais S, Pedrotti ML, Egge J, Iversen K, Marrasé C (2006). Effects of turbulence on TEP dynamics under contrasting nutrient conditions: implications for aggregation and sedimentation processes MEPS 323: 47-57

12.Thingstad TF, Øvreås L, Egge JK, Løvdal T, Heldal M (2005) Use of non-limiting substrates to increase size; a generic strategy to simultaneously optimize uptake and minimize predation in pelagic osmotrophs? Ecology Letters8 :675-682

13.  Helland, S., Nejstgaard J.C, Fyhn, H..J., Egge, J.K. & Båmstedt, U.  (2003) Effects of season, diet and starvation on the free amino acid and protein content of Calanus finmarchicus females. Mar. Biol. 143: 297–306

14.  Svensen C, Nejstgaard JC, Egge JK, Wassmann P (2002) Pulsing versus constant supply of nutrients (N,P, and Si): effect on phytoplankton, mesozooplankton and vertical flux of biogenic matter. Sci. Mar. 66(3):189-203

15.  Larsen A, Castberg T, Sandaa RA, Brussaard CPD, Egge J, Heldal M, Paulino A, Thyrhaug R, van Hannen EJ, Bratbak G (2001). Population dynamics and diversity of phytoplankton, bacteria and viruses in a seawater enclosure. Mar.Ecol. Prog. Ser. 221:47-57

16.    Castberg, T, Larsen, A, Sandaa, RA, Brussard CPD, Egge, JK, Heldal, M, Thyrhaug, R, van Hannen, EJ & Bratbak G (2001). Microbial population dynamics and diversity during a bloom of the marine coccolithophorid Emiliania huxleyi (Haptophyta) Mar. Ecol. Prog. Ser. 221:39-46

17.  Svensen C, Egge, JK & Stiansen JE (2001). Can silicate and turbulence regulate the vertical flux of biogenic matter? A mesocosm study. Mar. Ecol. Prog. Ser. 217: 67-80

18.  Head, R.N., D.W. Crawford, J. Egge, D. Lesley, S. Kristiansen, E. Marañón, D. Pond, D. Purdie & R. Harris (1998). The hydrography and biology of a bloom of the coccolithophorid Emiliana huxleyi in the Northern North Sea. Submitted to Journal of Sea Research 39: 255-266 Williams, P leB,  &  J.K. Egge (1998). The management and Behaviour of the mesocosm. Submitted to Estuarine, Coastal and Shelf  Sea Science. 46: 3-14

19.  Egge, J.K. (1998). Are diatoms bad competitors at low phosphate concentrations? Journal of Marine Systems. 16:191-198

20.  Wassmann, P., J.K. Egge, M. Reigstad & D.L. Aksnes (1997)  Influence of silicate on vertical flux on particulate biogenic matter. Mar. Poll. Bull. 400 (33): 10-20

21.  Egge, J.K. & A. Jacobsen (1997) Influence of silicate on particulate carbon production in phytoplankton. Mar. Ecol. Prog. Ser.: 147: 219-230

22.  Levasseur, M. S. Michaud, , J.K. Egge, G. Cantin, J.C. Nejstgaard R. Sanders, E. Fernández, P.T. Solberg, B. Heimdal & M. Gosslin (1996). Production of DMSP and DMS during a mesocosm study of an Emiliania huxleyi bloom: Influence of bacteria and Calanus finmarticus grazing.  Mar. Biol.  126: 609 - 618

23.  Kristiansen, K., J.K. Egge, T. Farbrot, T.M. Johnsen, E.R. Lømsland, S.M. Myklestad & T.F. Thingstad (1995). Growth and vertical migration of Gyrodinium aureolum during a bloom in Norwegian fjords. In: Skjoldal, H.R., C. Hopkins, K.E. Erikstad & H.P. Leinaas [Eds]: Ecology of Fjords and Coastal Waters. Proceedings of the Mare Nor Symposium on the Ecology of Fjords and Coastal Waters, Tromsø, Norway 5-9 December, 1994. Elsevier, p 275-289

24.  Jacobsen, A. J.K. Egge & B.R. Heimdal (1995). Effects of increased concentration of nitrate and phosphate during a springbloom experiment in mesocosm.  J. exp. mar. Biol. Ecol 187: 239-251

25.  Aksnes, D.L., K.B. Ulvestad, B.M. Balino, J. Berntsen, J.K. Egge, & E. Svendsen (1995). Ecological modelling in coastal waters: Towards predictive Physical‑Chemical‑Biological simulation models. Ophelia 41: 5-36

26.  Wal, P. van der, J.D.L. van Bleijswijk & J.K. Egge (1994).  Primary productivity and calcification rate in blooms of the coccolithophorid Emiliania huxleyi (Hay and Mohler) developing in mesocosms.  ‑  Sarsia 79: 401-408

27.  Heimdal, B.R., J.K. Egge, M.J.V. Veldhuis & P. Westbroek (1994). Introduction to the 1992 Norwegian EHUX experiment.  ‑  Sarsia 79: 285-290

28.  Egge, J.K. & B.R. Heimdal (1994). Blooms of Emiliania huxleyi in mesocosm experiment; effects of nutrient supply in different N:P ratios.  ‑  Sarsia 79: 333-348

29.  Bleijswijk, J. van, R. Kempers, P. van der Wal, P. Westbroek, J. Egge & T. Lukk (1994). Standing stocks of PIC, POC, PON and Emiliania huxleyi coccospheres and liths in seawater enclosures with different phosphate loadings.  ‑  Sarsia 79: 307-318

30.  Aksnes, D.L., J.K. Egge, R. Rosland & B.R. Heimdal (1994). On the representation of Emiliania huxleyi in phytoplankton simulation models.   ‑ Sarsia 79:291-300

31.  Westbroek, P., C.W. Brown, J. van Bleijswijk, C. Brownlee, G.J. Brummer, M. Conte, J. Egge, E. Fernàndez, R. Jordan, M. Knappertsbush, J. Stefels, M. Veldhuis,

32.  P. van der Wal & J. Young (1993). A model system approach to biological climate forcing. The example of Emiliania huxleyi. Global and Planetary Changes 8: 27-46.

33.  Aksnes, D.L. & J.K. Egge (1991) A teoretical model nutrient uptake in phytoplankton. Mar Ecol. Prog. Ser. 70: 65-72 

34.  Bratbak, G., J.K. Egge & M. Heldal (1993). Viral mortality of the marine alga Emiliania huxleyi (Haptophyceae) and termination of algal bloom. Mar. Ecol. Prog. Ser. 93: 39-49

35.  Egge, J.K. & D.L. Aksnes (1992). Silicate as regulating nutrient in phytoplankton competition. Mar. Ecol. Prog. Ser. 83: 281-289

 

36.  Kaartvedt, S., D.L. Aksnes & J.K. Egge (1987). Effects of light on the vertical distribution of Pecten maximus larvae. Mar. Ecol. Prog. Ser. 40: 195-197

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