Hjem
Inga Kjersti Sjøtuns bilde

Inga Kjersti Sjøtun

Førsteamanuensis
  • E-postKjersti.Sjotun@uib.no
  • Telefon+47 55 58 44 28
  • Besøksadresse
    Thormøhlensgt. 53 A/B
  • Postadresse
    Postboks 7803
    5020 Bergen

My research is on seaweeds. Seaweeds are very important primary producers in the coastal area, they form habitats for myriads of associated animals, they can function as devices for measuring levels of heavy metals in the environment, and they can be harvested or cultured for food or valuable biochemical components such as agar and alginate. My main interests are seaweed ecology, and how seaweeds evolve and adapt to the environment. Some of the topics I study:

-        Evolution, morphological variation and speciation processes in the genus Fucus

-        Effects of invasive seaweeds on indigenous coastal communities

-        Changes in seaweed communities due to environmental impact and climate changes

BIO309A Marin floristikk

BIO311 Systematikk og biologi til alger

BIO101 Organismebiologi 1

Tidsskriftartikler
  • Armitage, Caroline Susanne; Husa, Vivian; Petelenz-Kurdziel, Elzbieta Anna; Sjøtun, Kjersti. 2017. Growth and competition in a warmer ocean: A field experiment with a non-native and two native habitat-building seaweeds. Marine Ecology Progress Series. 573: 85-99. doi: 10.3354/meps12161
  • Enerstvedt, Kjersti Hasle; Lundberg, Anders; Sjøtun, Kjersti; Fadnes, Per; Jordheim, Monica. 2017. Characterization and seasonal variation of individual flavonoids in Zostera marina and Zostera noltii from Norwegian coastal waters. Biochemical Systematics and Ecology. 74C: 42-50. doi: 10.1016/j.bse.2017.08.003
  • Armitage, Caroline Susanne; Sjøtun, Kjersti. 2016. Epiphytic macroalgae mediate the impact of a non-native alga on associated fauna. Hydrobiologia. 776: 35-49. doi: 10.1007/s10750-016-2707-9
  • Armitage, Caroline Susanne; Sjøtun, Kjersti. 2016. Codium fragile in Norway: subspecies identity and morphology. Botanica Marina. 59: 439-450. doi: 10.1515/bot-2016-0095
  • Sjøtun, Kjersti; Heggøy, Erling; Gabrielsen, Tove M.; Rueness, Jan. 2016. Dasya adela sp. nov. (Rhodophyta, Ceramiales), an enigmatic new Dasya from a landlocked fjord in southwest Norway. Phycological Research. 64: 79-94. doi: 10.1111/pre.12121
  • Sjøtun, Kjersti; Husa, Vivian; Asplin, Lars; Sandvik, Anne Dagrun. 2015. Climatic and environmental factors influencing occurrence and distribution of macroalgae – a fjord gradient revisited. Marine Ecology Progress Series. 532: 73-88. doi: 10.3354/meps11341
  • Armitage, Caroline Susanne; Sjøtun, Kjersti; Jensen, Knut Helge. 2014. Correlative evidence for competition between fucus serratus and the introduced chlorophyte codium fragile subsp. fragile on the southwest coast of norway. Botanica Marina. 57: 85-97. doi: 10.1515/bot-2013-0087
  • Husa, Vivian; Kutti, Tina; Ervik, Arne S; Sjøtun, Kjersti; Hansen, Pia Kupka; Aure, Jan. 2014. Regional impact from fin-fish farming in an intensive production area (Hardangerfjord, Norway). Marine Biology Research. 10: 241-252. doi: 10.1080/17451000.2013.810754
  • Husa, Vivian; Steen, Henning; Sjøtun, Kjersti. 2014. Historical changes in macroalgal communities in Hardangerfjord (Norway). Marine Biology Research. 10: 226-240. doi: 10.1080/17451000.2013.810751
  • Skaala, Øystein; Sjøtun, Kjersti; Dahl, Einar; Husa, Vivian; Bjørge, Arne Jostein; Uiblein, Franz. 2014. Interactions between salmon farming and the ecosystem: Lessons from the Hardangerfjord, western Norway. Marine Biology Research. 10: 199-202. doi: 10.1080/17451000.2013.840730
  • Bengtsson, Mia M. B.; Sjøtun, Kjersti; Lanzén, Anders; Øvreås, Lise. 2012. Bacterial diversity in relation to secondary production and succession on surfaces of the kelp Laminaria hyperborea. The ISME Journal. 6: 2188-2198. doi: 10.1038/ismej.2012.67
  • Bengtsson, Mia M. B.; Sjøtun, Kjersti; Storesund, Julia Endresen; Øvreås, Lise. 2011. Utilization of kelp-derived carbon sources by kelp surface-associated bacteria. Aquatic Microbial Ecology. 62: 191-199. doi: 10.3354/ame01477
  • Brattegard, Torleiv; Høisæter, Tore; Sjøtun, Kjersti; Fenchel, Tom; Uiblein, Franz. 2011. Norwegian fjords: from natural history to ecosystem ecology and beyond. Marine Biology Research. 7: 421-424. doi: 10.1080/17451000.2011.561355
  • Eilertsen, Mette; Norderhaug, Kjell Magnus; Sjøtun, Kjersti. 2011. Does the amphipod fauna associated with epiphytes on kelp (Laminaria hyperborea) change with depth? Marine Biology Research. 7: 224-234. doi: 10.1080/17451000.2010.492592
  • Høisæter, Tore; Brattegard, Torleiv; Sjøtun, Kjersti. 2011. Norwegian fjords: From natural history to ecosystem ecology and beyaond. Marine Biology Research. 7: 421-424. doi: 10.1080/17451000.2011.561355
  • Sjøtun, Kjersti; Heldal, Hilde Elise; Brakstad, Daniela Sabine. 2011. Differential concentration of Technetium-99 (99Tc) in common intertidal molluscs with different food habits. Marine Pollution Bulletin. 62: 2420-2426. doi: 10.1016/j.marpolbul.2011.08.027
  • Bengtsson, Mia M. B.; Sjøtun, Kjersti; Øvreås, Lise. 2010. Seasonal dynamics of bacterial biofilms on the kelp Laminaria hyperborea. Aquatic Microbial Ecology. 60: 71-83. doi: 10.3354/ame01409
  • Heldal, Hilde Elise; Sjøtun, Kjersti. 2010. Technetium-99 (Tc-99) in annual growth segments of knotted wrack (Ascophyllum nodosum). Science of the Total Environment. 48: 5575-5582. doi: 10.1016/j.scitotenv.2010.07.068
  • Lorentsen, Svein Håkon; Sjøtun, Kjersti; Grémillet, David. 2010. Multi-trophic consequences of kelp harvest. Biological Conservation. 143: 2054-2062. doi: 10.1016/j.biocon.2010.05.013
  • Skage, Morten; Mikkelsen, Nina Therese; Sjøtun, Inga Kjersti. 2009. GENETIC SEPARATION OF DIFFERENT ENTITIES OF MASTOCARPUS STELLATUS (STACKHOUSE) GUIRY. Phycologia. 48: 121-122.
  • Coyer, James A.; Hoarau, Galice; Sjøtun, Inga Kjersti; Olsen, Jeanine L. 2008. Being abundant is not enough: a decrease in effective population size over eight generations in a Norwegian population of the seaweed, Fucus serratus. Biology Letters. 4: 755-757. doi: 10.1098/rsbl.2008.0403
  • Husa, Vivian; Sjøtun, Inga Kjersti; Brattenborg, Narve; Lein, Tor Eiliv. 2008. Changes of macroalgal biodiversity in sublittoral sites in southwest Norway: impact of an introduced species or higher temperature? Marine Biology Research. 4: 414-428. doi: 10.1080/17451000802232874
  • Sjøtun, Inga Kjersti; Husa, Vivian; Peña, Viviana. 2008. Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions. 3: 389-406. doi: 10.3391/ai.2008.3.4.3
  • Rueness, Jan; Heggøy, Erling; Husa, Vivian; Sjøtun, Inga Kjersti. 2007. First report of the Japanese red alga Antithamnion nipponicum (Ceramiales, Rhodophyta) in Norway, an invasive species new to northern Europe. Aquatic Invasions. 2: 431-434.
  • Sjøtun, Kjersti; Eggereide, Sarah Fagertun; Høisæter, Tore. 2007. Grazer-controlled recruitment of the introduced Sargassum muticum (Phaeophyceae, Fucales) in northern Europe. Marine Ecology Progress Series. 342: 127-138.
  • Husa, Vivian; Sjøtun, Kjersti. 2006. Vegetative reproduction in "Heterosiphonia japonica" (Dasyaceae, Ceramiales), an introduced red alga on European coasts. Botanica Marina. 49: 191-199. doi: 10.1515/BOT.2006.024
  • Sjøtun, Kjersti; Christie, Hartvig; Fosså, Jan Helge. 2006. The combined effect of canopy shading and sea urchin grazing on recruitment in kelp forest (Laminaria hyperborea). Marine Biology Research. 2: 24-32. doi: 10.1080/17451000500537418
  • Rinde, Eli; Sjøtun, Kjersti. 2005. Demographic variation in the kelp Laminaria hyperborea along a latitudinal gradient. Marine Biology. 146: 1051-1062.
  • Husa, V; Sjøtun, Kjersti; Lein, TE. 2004. The newly introduced species Heterosiphonia japonica Yendo (Dasyaceae, Rhodophyta): geographical distribution and abundance at the Norwegian southwest coast. Sarsia. 89: 211-217.
  • Husa, Vivian; Sjøtun, Kjersti; Lein, Tor Eiliv. 2004. The newly introduced species Heterosiphonia japonica Yendo (Dasyaceae, Rhodophyta): geographical distribution and abundance at the Norwegian southwest coast. Sarsia. 5: 211-218. doi: 10.1080/00364820410006600
Rapporter/avhandlinger
  • Rueness, Eli Knispel; Cadahia-Lorenzo, Luis; Hoel, Kristian; Søderquist, Pär; Velle, Gaute; Asmyhr, Maria Gulbrandsen; de Boer, Hugo; Gjershaug, Jan Ove; Hindar, Kjetil; Kirkendall, Lawrence R.; Nagy, Nina Elisabeth; Nielsen, Anders; Sandlund, Odd Terje; Sjøtun, Kjersti; Stenøien, Hans K.; Vandvik, Vigdis. 2017. Assessment of the risks associated with the import and release of hand-reared mallards for hunting purposes. Opinion of the Panel on Alien Organisms and Trade in Endangered Species (CITES) of the Norwegian Scientific Committee for Food Safety, VKM Report 2017:23. Norwegian Scientifc Committee for Food Safety (VKM), Oslo, Norway. 126 sider.
  • Fredriksen, Stein; Sjøtun, Kjersti. 2015. Risikovurdering ved utseting av ikke-stedegen tare. Miljødirektoratet. 12 sider.
  • Oug, Eivind; Bjørge, Arne Jostein; Gjøsæter, Jakob; Lorentsen, Svein-Håkon; Sjøtun, Kjersti; Sneli, Jon-Arne. 2013. Utvikling av indikatoren «sårbare og truete arter» for Nordsjøen, Norskehavet og Barentshavet. En oversikt over forekomst og kunnskapsgrunnlag for truete arter og ansvarsarter i norske sjøområder. NIVA-rapport. 6509. Norsk institutt for vannforskning, Oslo. 59 sider.
  • Husa, Vivian; Heggøy, Erling; Sjøtun, Kjersti; Agnalt, Ann-Lisbeth; Johansen, Per-Otto; Glenner, Henrik; Hatlen, Kristin. 2012. Kartlegging av fremmede marine arter i Hordaland. Utredning for DN. 2012: 2. Direktoratet for Naturforvaltning, Trondheim. 26 sider.
  • Fredriksen, Stein; Skjoldal, HR; Husa, Vivian; Olsen, Yngvar; Christie, Hartvig C; Dale, Trine; Sjøtun, Kjersti. 2011. Vurdering av eutrofisituasjonen i kystområder, med særlig fokus på Hardangerfjorden og Boknafjorden. Fiskeri- og kystdepartementet (FKD), Oslo. 84 sider.
  • Sjøtun, Kjersti; Olsen, Bernt Rydland; Eggereide, Sarah Fagertun. 2004. Biomass survey of Laminaria digitata in the Smøla area. Fisken og Havet. 2004-11. Institute of Marine research, Bergen, Norway. 21 sider.
  • Sjøtun, Inga Kjersti. 1995. Adaptive aspects of growth and reproduction in two North Atlantic Laminaria species. -Dr. scient. Thesis.
Bokkapitler
  • Fredriksen, Stein; Moy, Frithjof Emil; Husa, Vivian; Sjøtun, Kjersti; Schneider, Susanne Claudia. 2015. Alger Cyanophyta, Rhodophyta, Chlorophyta, Ochrophyta. Alger. I:
    • Henriksen, Snorre; Hilmo, Olga. 2015. Norsk rødliste for arter 2015. Versjon 1.2. 193 sider. ISBN: 978-82-92838-41-9.
  • Sjøtun, Kjersti; Fredriksen, Stein; Heggøy, Erling; Husa, Vivian; Langangen, Anders Vidar; Lindstrøm, Eli-Anne; Moy, Frithjof Emil; Rueness, Jan; Åsen, Per Arvid. 2010. Alger: Cyanophyta, rhodophyta, chlorophyta, ochrophyta. Alger, sider 79-86. I:
    • Kålås, John Atle; Viken, Åslaug; Henriksen, Snorre; Skjelseth, Sigrun. 2010. Norsk rødliste for arter 2010. The 2010 Norwegian Red List for Species. 480 sider. ISBN: 978-82-92838-26-6.
  • Rueness, Jan; Bjærke, Marit Ruge; Fredriksen, Stein; Langangen, Anders; Lindstrøm, Eli-Anne; Moy, Frithjof; Sjøtun, Kjersti. 2006. Alger - Cynanophyta, Rhodophyta, Phaeophyceae, Ulvophyceae, Charophyceae. Kapittel, sider 95-102. I:
    • Kålås, John Atle; Viken, Åslaug; Bakken, Torkild. 2006. Norsk Rødliste 2006 - 2006 Norwegian Red List. 416 sider. ISBN: 82-92838-00-7.

Se fullstendig oversikt over publikasjoner i CRIStin.

Armitage CS, Sjøtun K (2017). Can an old alien benefit from rising ocean temperatures? An experimental and field study on the growth and local distribution of Codium fragile subsp. fragile (Chlorophyta). Marine Biology DOI 10.1007/s00227-017-3170-5

Armitage CS, Husa V, Petelenz-Kurdziel EA, Sjøtun K (2017). Growth and competition in a warmer ocean: A field experiment with a non-native and two native habitat building seaweeds. Marine ecology Progress Series 573: 85–99

Sjøtun K, Heesch S, Rull Lluch J, Martín Martín R, Gómez Garreta A, Brysting AK, Coyer JA (2017). Unraveling the complexity of salt marsh "Fucus cottonii" forms (Phaeophyceae, Fucales). European Journal of Phycology   doi.org/10.1080/09670262.2017.1309688

Armitage CS, Sjøtun K (2016). Codium fragile in Norway: Subspecies identity and morphology. Botanica Marina 56: 439–450

Sjøtun K, Heggøy E, Gabrielsen TM, Rueness J (2016). Dasya adela sp. nov. (Rhodophyta, Ceramiales), an enigmatic new Dasya from a landlocked fjord in southwest Norway. Phycological Research 64: 79-94

Armitage CS, Sjøtun K (2016). Epiphytic macroalgae mediate the impact of a non-native alga on associated fauna. Hydrobiologia DOI 10.1007/s10750-016-2707-9

Sjøtun K, Husa V, Asplin L, Sandvik AD (2015). Climatic and environmental factors influencing occurrence and distribution of macroalgae – a fjord gradient revisited. Marine Ecology – Progress Series 532: 73-88 

Armitage C, Sjøtun K, Jensen KH (2014). Correlative evidence for competition betweenFucus serratus and the introduced chlorophyte Codium fragile subsp. fragile on the southwest coast of Norway. Botanica Marina 57: 85-97

Husa V, Steen H, Sjøtun K (2014). Historical changes in macroalgal communities in Hardangerfjord (Norway). Marine Biology Research 10: 226-240

Husa V, Kutti T, Ervik A, Sjøtun K, Kupka Hansen P, Aure J (2014). Regional impact from fin-fish farming in an intensive production area (Hardangerfjord, Norway). Marine Biology Research 10: 241-252

Bengtsson MM, Sjøtun K, Lanzén A & Øvreås L (2012). Bacterial diversity in relation to secondary production and succession on surfaces of the kelp Laminaria hyperborea. The ISME Journal 6: 2188-2198

Sjøtun K, Heldal HE, Brakstad, DS (2011). Differential concentration of Technetium-99 (99Tc) in common intertidal molluscs with different food habits. Marine Pollution Bulletin 62:2420-2426

Brattegard T, Høisæter T, Sjøtun K, Fenchel T & Uiblein F (2011). Norwegian Fjords: from Natural History to Ecosystem Ecology and beyond. Marine Biology Research 7: 421-424 (editorial note).

Eilertsen M, Norderhaug KM & Sjøtun K (2011). Does the amphipod fauna associated to epiphytes on kelp (Laminaria hyperborea) change with depth? Marine Biology Research 7: 224-234

Bengtsson MM, Sjøtun K, Storesund JE& Øvreås L (2011). Utilization of kelp-derived carbon sources by kelp surface-associated bacteria. Aquatic Microbial Ecology 62: 191-199

Heldal HE & Sjøtun K (2010). Technetium-99 (99Tc) in annual growth segments of knotted wrack (Ascophyllum nodosum). Science of the Total Environment 408: 5575-5582

Lorentsen S-H, Sjøtun K & Grémillet D (2010). Multi-trophic consequences of kelp harvest. Biological Conservation 143: 2054-2062

Bengtsson M, Sjøtun K & Øvreås L (2010). Seasonal dynamics of bacterial biofilms on kelp (Laminaria hyperborea). Aquatic Microbial Ecology 60: 71-83

Coyer J, Hoarau G, Sjøtun K & Olsen JL (2008). Being abundant is not enough: a decrease in effective population size over eight generations in a Norwegian population of the seaweed, Fucus serratus. Biology Letters 4: 755-757

Sjøtun K, Husa V & Peña V (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions 3: 377-394

Husa V, Sjøtun K, Brattenborg N & Lein TE (2008). Changes of macroalgal biodiversity in sublittoral sites in southwest Norway: impact of an introduced species or higher temperature? Marine Biology Research 4: 414-428

Rueness J, Heggøy E, Husa V & Sjøtun K (2007). First report of the Japanese red alga Antithamnion nipponicum (Ceramiales, Rhodophyta) in Norway, an invasive species new to northern Europe. Aquatic invasions 2: 431-434 (Short communication).

Sjøtun K, Eggereide SF & Høisæter T (2007). Grazer-controlled recruitment of the introduced Sargassum muticum (Phaeophyceae, Fucales) in northern Europe. Marine Ecology Progress Series 342: 127-138. 

Husa V & Sjøtun K (2006). Vegetative reproduction in "Heterosiphonia japonica" (Dasyaceae, Ceramiales), an introduced red alga on European coasts. Botanica Marina 49: 191-199

Sjøtun K, Christie H & Fosså JH (2006). The combined effect of canopy shading and sea urchin grazing on recruitment in kelp forest (Laminaria hyperborea). Marine Biology Research 2: 24-32. 

Rinde E & Sjøtun K (2005). Demographic variation in the kelp Laminaria hyperborea along a latitudinal gradient. Marine Biology 146: 1051-1062

Husa V, Sjøtun K & Lein TE (2004). The newly introduced species Heterosiphonia japonica Yendo (Dasyaceae, Rhodophyta): geographical distribution and abundance at the Norwegian southwest coast. Sarsia 89: 211-217

Sjøtun K & Schoschina EV (2002). Gametophytic development of Laminaria spp. (Laminariales, Phaeopyceae) at low temperature. Phycologia 41: 147-152

Nettverket "Norwegian seaweeds": http://seaweeds.uib.no

INVASIVES, Seas-era prosjekt 2013-2016: http://invasives.b.uib.no/

 

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