Jonna Engström-Öst


PhD, Senior Researcher

Novia University of Applied Sciences
Raseborgsvägen 9 , FI-10600 EKENÄS 
+358 (0)44 449 8408 
jonna.engstrom-ost [at]
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Research interests

  • Zooplankton reproduction in cyanobacteria blooms
  • The effect of climate change and eutrophication on cyanobacteria population dynamics, toxin production and allelopatic capacity
  • Consequences of ocean acidification and global warming on zooplankton
  •  Marine environment changes following eutrophication and climate change

Ongoing projects

I am currently having a position as Senior Scientist at Novia and leading an Academy of Finland project on zooplankton and climate change effects.

Anna-Karin Almén is doing her PhD thesis in the "Effects of climate change on copepods" project. We collaborate in field experiments with Prof. Ulf Riebesell to study how plankton respond to ocean acidification. 

Together with researchers from the Finnish Environment Institute (Sirpa Lehtinen and Maiju Lehtiniemi) and the Finnish Meteorological Institute, we analyse long-term data of plankton, water quality and climate to reveal which processes are important in the Baltic Sea concerning sea status and future. Louise Lindroos has started her PhD within this project in collaboration with Andreas Lindén

I collaborate with post-doc Olivier Glippa, funded by the Academy of Finland in the project "Zooplankton responses to acidification and warming in the marine environment". His main research interests are long-term data, zooplankton ecology and climate change. 

We also work with Bart De Stasio in Lawrence University, Wisconsin and Andreas Brutemark (Calluna, Stockholm) concerning cyanobacteria-zooplankton interactions.


I did my Ph.D. thesis in the University of Helsinki and Finnish Institute of Marine Research on cyanobacteria, zooplankton and planktivore interactions in the EZECO research group, supervised by Markku Viitasalo. After finishing my thesis, I worked as a post-doc in the project entitled ‘Eutrophication and the behavioural ecology of the northern pike (Esox lucius): conservation implications', funded by the Academy of Finland. Part of my post-doc, I stayed in the beautiful city of Vancouver, British Columbia. Later I was funded by the Academy of Finland as Academy Research Fellow, studying cyanobacteria-copepod interactions during climate change.



53. Glippa O, Brutemark A, Johnson J, Spilling K, Candolin U, Engström-Öst J: Early development of the threespine stickleback larvae in relation to water pH. Frontiers in Marine Science (in press)

52. Engström-Öst, J, Barrett, NJ, Brutemark, A, Vehmaa, A, Dwyer, A, Almén, A-K, De Stasio B (2017) Feeding, survival and reproduction of two populations of Eurytemora (Copepoda) exposed to local toxic cyanobacteria. Journal of Great Lakes Research 43:1091-1100. Abstract

51. Jacobsen L & Engström-Öst J: Coping with environments - vegetation, turbidity and abiotics. In: (Eds. Nilsson A & Skov C), Biology and ecology of pike, CRC Press. (in press)

50. Almén A-K, Brutemark A, Jutfelt F, Riebesell U & Engström-Öst J (2017) Ocean acidification shows no detectable effect on swimming activity and body size in a common copepod. Hydrobiologia 802: 235-243.

49.  Almén A-K, Glippa O, Pettersson H, Alenius P, Engström-Öst J (2017) Changes in wintertime pH and hydrography of the Gulf of Finland with focus on depth layers. Environmental Monitoring and Assessment 189: 147.

48. Bermúdez R, Winder M, Stuhr A, Almén A-K, Engström-Öst J, Riebesell, U (2016) Effects of ocean acidification on the structure and fatty acid composition of a natural plankton community in the Baltic Sea. Biogeosciences 13: 6625-6635.

47. Vehmaa, A, Almén A-K, Brutemark, A, Paul, A, Riebesell, U, Furuhagen, S, Engström-Öst, J (2016) Ocean acidification challenges copepod reproductive plasticity. Biogeosciences 13: 6171-6182.

46. Almén, A-K, Vehmaa, A, Brutemark, A, Bach, L, Lischka, S, Stuhr, A, Furuhagen, S, Paul, A, Bermúdez, JR, Riebesell, U, Engström-Öst, J (2016) Negligible effects of ocean acidification on Eurytemora affinis (Copepoda) offspring production. Biogeosciences 13: 1037-1048. Abstract  PDF

45. Brutemark A, Vandelannoote A, Engström-Öst J & Suikkanen S (2015) A less saline Baltic Sea promotes cyanobacterial growth, hampers microcystin production and leads to intra-specific differences in allelopathy. PLOS ONE 10: e0128904. Abstract PDF

44. Engström-Öst, J, Brutemark A, Vehmaa A, Motwani NM & Katajisto T (2015) Consequences of cyanobacteria blooms on copepod reproduction, mortality and sex ratio. Journal of Plankton Research 37: 388-398.

43. Engström-Öst J, Savatijevic Rasic I, Brutemark A, Rancken R, Subakov Simić G, Laugen AT (2015) Can Cylindrospermopsis raciborskii invade the Baltic Sea? Environmental Reviews 23: 161-169. 

42. Brutemark A, Engström-Öst, J, Vehmaa A & Gorokhova E (2015) Growth, toxicity and oxidative stress of a cultured cyanobacterium (Dolichospermum sp.) during different pH and temperature conditions. Phycological Research 63: 56-63. Abstract PDF

41. Hogfors, H., Motwani, N.H., Hajdu, S., El-Shehawy, R., Holmborn, T., Vehmaa, A., Engström-Öst, J., Brutemark, A. & Gorokhova, E. (2014) Bloom-forming cyanobacteria support copepod reproduction and development in the Baltic Sea. PLOS ONE Abstract PDF

40. Almén, A.-K., Vehmaa, A., Brutemark, A. & Engström-Öst, J. (2014) Coping with climate change? Copepods experience drastic variations in their physicochemical environment on diurnal basis. Journal of Experimental Marine Biology and Ecology 460: 120-128. Abstract

39. Engström-Öst, J., Holmborn, T., Brutemark, A., Hogfors, H., Vehmaa A. & Gorokhova, E. (2014) The effects of short-term pH decrease on the reproductive output of the copepod Acartia bifilosa – a laboratory study. Marine and Freshwater Behaviour and Physiology 47: 173-183. Abstract

38. Vehmaa, A., Hogfors, H., Gorokhova, E., Brutemark, A., Holmborn, T. & Engström-Öst, J. (2013) Projected marine climate change: effects on copepod oxidative status and reproduction. Ecology & Evolution 3: 4548-4557.    Abstract    PDF

37. Brutemark, A. & Engström-Öst, J. (2013) Does the presence of zooplankton influence growth and toxin production of Nodularia spumigena? International Review of Hydrobiology 98: 225-234. Abstract

36. Salonen, M. & Engström-Öst, J. (2013): Growth of pike larvae: effects of prey, turbidity and food quality. Hydrobiologia 717: 169-175 Abstract

35. Engström-Öst, J., Repka, S., Brutemark, A. & Nieminen, A. (2013) Clay and algae-induced effects on biomass, cell size and toxin concentration in a brackish-water cyanobacterium. Hydrobiologia 714: 85-92. Abstract PDF

34. Suikkanen, S., Pulina, S., Engström-Öst, J., Lehtiniemi, M., Lehtinen, S. & Brutemark, A. (2013): Climate change and eutrophication induced shifts in northern summer plankton communities. PLoS One 8(6): e66475. Abstract PDF

33. Engström-Öst, J., Autio, R., Setälä, O., Sopanen, S. & Suikkanen, S. (2013): Plankton community dynamics during decay of a cyanobacteria bloom – a mesocosm experiment. Hydrobiologia 701: 25-35. Abstract

32. Vehmaa, A., Brutemark, A. & Engström-Öst, J. (2012): Maternal effects may act as an adaptation mechanism for copepods facing pH and temperature changes. PLoS One 7(10): e48538. Abstract

31. Vehmaa A, Kremp A, Tamminen T, Hogfors H, Spilling K, & Engström-Öst J (2012) Copepod reproductive success in spring-bloom communities with modified diatom and dinoflagellate dominance- ICES Journal of Marine Science 69: 351-357. Abstract

30. Ianora A, Bentley MG, Caldwell GS, Casotti R, Cembella AD, Engström-Öst J, Halsband-Lenk C, Sonnenschein E, Legrand C, Llewellyn CA, Paldavičienë A, Pilkaityte R, Pohnert G, Razinkovas A, Romano G, Tillmann U, Vaiciute D (2011) The relevance of marine chemical ecology to plankton and ecosystem function: an emerging field. - Marine Drugs 9: 1625-1648.

29. Engström-Öst J, Repka S & Mikkonen M (2011) Interactions between plankton and cyanobacterium Anabaena with focus on growth and toxin concentration. - Harmful Algae 10: 530-535. Abstract

28. Brutemark A, Engström-Öst J & Vehmaa A (2011) Long-term monitoring data reveal pH dynamics, trends and variability in the western Gulf of Finland. - Oceanological and Hydrobiological Studies 40: 91-94 PDF

27.  Vehmaa A, Larsson P, Vidoudez C, Pohnert G, Reinikainen M & Engström-Öst J (2011): How will increased dinoflagellate:diatom ratios affect copepod reproduction? A case study from the Baltic Sea. - Journal of Experimental Marine Biology and Ecology 401: 134-140. Abstract

26. Engström-Öst J, Hogfors H, El-Shehawy R, De Stasio B, Vehmaa A & Gorokhova E (2011): Toxin producing cyanobacterium Nodularia spumigena, potential competitors and grazers: testing mechanisms of reciprocal interactions. Aquatic Microbial Ecology 62: 39-48. Abstract

25. Salonen M & Engström-Öst J (2010) Prey capture of pike larvae Esox lucius in turbid water. - Journal of Fish Biology 76: 2591-2596. Abstract

24. Salonen M, Urho L & Engström-Öst J (2009) Effects of turbidity and zooplankton availability on the condition and prey selection of pike larvae. - Boreal Environment Research 14: 981-989 PDF

23. Gorokhova E & Engström-Öst J (2009) Toxin concentration in Nodularia spumigena is modulated by mesozooplankton grazers. - Journal of Plankton Research 31:1235-1247. Abstract PDF

22. Engström-Öst J, Öst, M & Yli-Renko M (2009) Balancing algal toxicity and turbidity with predation risk in the three-spined stickleback. - Journal of Experimental Marine Biology and Ecology 377: 54-59. Abstract

21. Engström-Öst J & Mattila J (2008) Foraging, growth and habitat choice in turbid water: an experimental study with fish larvae in the Baltic Sea. - Marine Ecology Progress Series 359: 275-281. Abstract

20. Candolin U, Engström-Öst J & Salesto T (2008) Human-induced eutrophication enhances reproductive success through effects on parenting ability in sticklebacks. - Oikos 117: 459-465. Abstract    PDF

19. Karjalainen M, Engström-Öst J, Korpinen S, Peltonen H, Pääkkönen J-P, Rönkkönen S, Suikkanen S & Viitasalo M (2007) Ecosystem consequences of cyanobacteria in the northern Baltic Sea. - AMBIO 36: 195-202. Abstract

18. Engström-Öst J & Candolin U (2007) Human induced water turbidity alters selection on sexual displays in sticklebacks. - Behavioral Ecology 18: 393-398. Abstract    PDF

17. Engström-Öst J, Immonen E, Candolin U & Mattila J (2007) The indirect effects of eutrophication on habitat choice and survival of fish larvae in the Baltic Sea. - Marine Biology 151: 393-400. Abstract PDF

16. Suikkanen S, Engström-Öst J, Jokela J, Sivonen K & Viitasalo M (2006) Allelopathy of Baltic Sea cyanobacteria: no evidence for the role of nodularin. - Journal of Plankton Research 28 (6): 543-550. Abstract     PDF

15. Engström-Öst J, Karjalainen M & Viitasalo M (2006) Feeding and refuge use by small fish in the presence of cyanobacteria blooms. - Environmental Biology of Fishes 76: 109-117. Abstract PDF

14. Engström-Öst J & Isaksson I (2006) Effects of macroalgal exudates and oxygen deficiency on survival and behaviour of fish larvae. - Journal of Experimental Marine Biology and Ecology 335: 227-234. Abstract

13. Karjalainen M, Kozlowsky-Suzuki B, Lehtiniemi M, Engström-Öst J, Kankaanpää H & Viitasalo M (2006) Nodularin accumulation during cyanobacterial blooms and experimental depuration in zooplankton. - Marine Biology 148: 683-691. Abstract PDF

12. Engström-Öst J, Lehtiniemi M, Jónasdóttir SH & Viitasalo M (2005) Growth of pike larvae (Esox lucius) under different conditions of food quality and salinity. - Ecology of Freshwater Fish 14: 385-393. Abstract

11. Lehtiniemi M, Engström-Öst J & Viitasalo M (2005) Turbidity decreases anti-predator behaviour in pike larvae (Esox lucius). - Environmental Biology of Fishes 37: 1-8. Abstract PDF

10. Engström-Öst J & Lehtiniemi M (2004) Threat-sensitive predator avoidance by pike larvae. - Journal of Fish Biology 65: 251-261. Abstract    PDF

9. Kozlowsky-Suzuki B, Karjalainen M, Lehtiniemi M, Engström-Öst J, Koski M & Carlsson P (2003) Feeding, reproduction and toxin accumulation by the copepods Acartia bifilosa and Eurytemora affinis in the presence of the toxic cyanobacterium Nodularia spumigena. - Marine Ecology Progress Series 249: 237-249. Abstract PDF

8. Engström-Öst J, Lehtiniemi M, Green S, Kozlowsky-Suzuki B & Viitasalo M (2002) Does cyanobacterial toxin accumulate in mysid shrimps and fish via copepods? - Journal of Experimental Marine Biology and Ecology 276: 95-107. Abstract

7. Schmidt K, Koski M, Engström-Öst J & Atkinson A (2002) Development of Baltic Sea zooplankton in the presence of a toxic cyanobacterium: a mesocosm approach. - Journal of Plankton Research 24: 979-992. Abstract    PDF

6. Lehtiniemi M, Engström-Öst J, Karjalainen M, Kozlowsky-Suzuki B & Viitasalo M (2002) Fate of cyanobacterial toxins in the pelagic food web: transfer to copepods or to faecal pellets? - Marine Ecology Progress Series 241: 13-21. Abstract PDF

5. Engström-Öst J, Koski M, Schmidt K, Viitasalo M, Jónasdóttir SH, Kokkonen M, Repka S & Sivonen K (2002) Effects of toxic cyanobacteria on a plankton assemblage: community development during decay of Nodularia spumigena. - Marine Ecology Progress Series 232: 1-14. Abstract PDF

4. Koski M, Schmidt K, Engström-Öst J, Viitasalo, Jónasdóttir SH, Repka S & Sivonen K (2002) Calanoid copepods feed and produce eggs in the presence of toxic cyanobacteria Nodularia spumigena. - Limnology and Oceanography 47: 878-885. Abstract PDF

3. Engström J, Viherluoto M & Viitasalo M (2001) Effects of toxic and non-toxic cyanobacteria on grazing, zooplanktivory and survival of the mysid shrimp, Mysis mixta. - Journal of Experimental Marine Biology and Ecology 257: 269-280. Abstract

2. Engström J, Koski M, Viitasalo M, Reinikainen M, Repka S & Sivonen K (2000) Feeding interactions of the copepods Eurytemora affinis and Acartia bifilosa with the cyanobacteria Nodularia sp. - Journal of Plankton Research 22: 1403-1409. Abstract     PDF

1. Koski M, Engström J & Viitasalo M (1999) Reproduction and survival of the calanoid copepod Eurytemora affinis fed with toxic and non-toxic cyanobacteria. - Marine Ecology Progress Series 186:187-197. Abstract PDF