Members

Here you can find a list of all ARCTOS members and PhD students. In the drop-down menu you can either select the member status or the institution the member belongs to.

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Geir Wing Gabrielsen

Senior Scientist & Research Department Leader

Norwegian Polar InstituteResearch department: Ecotoxicology Work address Norwegian Polar Institute Fram Centre Tromsø 9296 Norway Work Phone: +47 77 75 05 29
Photo of Julia Giebichenstein

Julia Giebichenstein

PhD candidate

PhD project title: Effects of changes in species composition and distribution on contaminant accumulation in an Arctic marine food web.…Read More
University in OsloDepartment of Biosciences Work address Department of Biosciences Faculty of Mathematics and Natural Sciences Oslo University Oslo 0371 Norway Website: Research group blog

PhD project title:

Effects of changes in species composition and distribution on contaminant accumulation in an Arctic marine food web.

PhD project description:

Arctic marine organisms are susceptible to multiple stressors, including climate change, increased human activities such as fisheries and tourism and pollution. Combined, these stressors are expected to alter food web composition and the transport, fate, and effects of pollutants within it. But, seasonal changes in pollution dynamics have rarely been studied in Arctic marine food webs, leaving a big knowledge gap. Therefore, I want to identify and compare seasonal bioaccumulation and biomagnification processes of legacy (phased-out) and new pollutants related to energy use and availability in a Barents Sea food web. To do so, I am joining four research cruises in different seasons, and am sampling key species of zooplankton and fishes. With the help of chemical and dietary descriptors I want to determine how seasonal changes in energy acquisition and allocation affect the annual dynamics of species composition, pollutant accumulation and transfer in the food web.

Start date: 01.05.2019
Planned submission date: 30.04.2022

Supervisors:

Katrine Borgå (UiO, Oslo, Norway)
Geir W. Gabrielsen (NPI, Tromsø, Norway)
Øystein Varpe (UiB, Bergen, Norway)
Tom Andersen (UiO, Oslo, Norway)

Outreach:

Photo of Rolf Gradinger

Rolf Gradinger

Professor

Research interests:
  • sea ice ecology
  • marine protists
  • microbial food web
  • climate change.
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UiT The Arctic University of NorwayArctic and Marine Biology Work address Department of Arctic and Marine Biology Faculty of Biosciences, Fisheries and Economics UiT The Arctic University of Norway Tromsø 9034 Norway Work Phone: +47 77 64 45 14 Website: UiT employee profile Website: Arctic Marine System Ecology research group at UiT

Research interests:

  • sea ice ecology
  • marine protists
  • microbial food web
  • climate change.

Running national and international projects:

  • Arctic SIZE: Seasonal Ice Zone Ecology

Completed national and international projects:

  • Diversity, seasonality and function of parasitic fungi in Arctic Sea ice (PI), 2013-2016, funded by the U.S. National Science Foundation (NSF)
  • BEST: Sea ice algae, a major food source for herbivorous plankton and benthos in the eastern Bering Sea (PI), 2007-2014, funded by NSF
  • Tracking the seasonal contribution of algal fatty acids to the Arctic marine system (Co-PI), 2009-2013, funded by NSF

Relevant scientific publications (last 5 years):

 

  1. Hassett, Brandon T.; Gradinger, Rolf. Chytrids dominate arctic marine fungal communities. Environmental Microbiology 2016. ISSN 1462-2912.s doi: 10.1111/1462-2920.13216.
  2. Hassett, Brandon T.; Lopez, J. Andres; Gradinger, Rolf. Two new species of marine saprotrophic sphaeroformids in the mesomycetozoea isolated from the sub-arctic Bering Sea. (fulltekst) Protist 2015; Volum 166 (3). ISSN 1434-4610.s 310 – 322.s doi: 10.1016/j.protis.2015.04.004.
  3. Szymanski, Anna; Gradinger, Rolf. The diversity, abundance and fate of ice algae and phytoplankton in the Bering Sea. Polar Biology 2015; Volum Published ahead of print. ISSN 0722-4060.s doi: 10.1007/s00300-015-1783-z.
  4. Grebmeier, Jacqueline M.; Bluhm, Bodil; Cooper, Lee W.; Danielson, Seth L.; Arrigo, Kevin R.; Blanchard, Arny L.; Clarke, Janet T.; Day, Robert H.; Frey, Karen E.; Gradinger, Rolf; Kędra, Monika; Konar, Brenda; Kuletz, Kathy J.; Lee, Sang H.; Lovvorn, James R.; Norcross, Brenda L.; Okkonen, Stephen R.. Ecosystem characteristics and processes facilitating persistent macrobenthic biomass hotspots and associated benthivory in the Pacific Arctic. Progress in Oceanography 2015; Volum 136. ISSN 0079-6611.s 92 – 114.s doi: 10.1016/j.pocean.2015.05.006.
  5. Leu, Eva; Mundy, Christopher John; Assmy, Philipp; Campbell, Karley; Gabrielsen, Tove M.; Gosselin, Michel; Juul-Pedersen, Thomas; Gradinger, Rolf. Arctic spring awakening – Steering principles behind the phenology of vernal ice algal blooms. Progress in Oceanography 2015; Volum 139. ISSN 0079-6611.s 151 – 170.s doi: 10.1016/j.pocean.2015.07.012.
  6. Nelson, R. John; Ashjian, Carin; Bluhm, Bodil; Conlan, Kathleen E.; Gradinger, Rolf; Grebmeier, Jacqueline M.; Hill, Victoria J.; Hopcroft, Russell R.; Hunt, Brian P.V.; Joo, Hyoung M.; Kirchman, David; Kosobokova, Ksenia N.; Lee, Sang H.; Li, W; Lovejoy, Connie; Poulin, Michel; Sherr, Evelyn; Young, Kelly W.. Biodiversity and Biogeography of the Lower Trophic Taxa of the Pacifi c Arctic Region: Sensitivities to Climate Change. Springer 2014 ISBN 978-94-017-8862-5.s 269 – 336.s doi: 10.1007/978-94-017-8863-2_10.
  7. Bluhm, Bodil; Michel, C; Gallucci, V.; Gaston, A. J.; Gordillo, F; Gradinger, Rolf; Hopcroft, R; Jensen, N.; Mustonen, T; Niemi, A.; Nielsen, T.G.. Biodiversity of Arctic marine ecosystems and responses to climate change. Biodiversity 2012. ISSN 1488-8386.s 200 – 214.s doi: 10.1080/14888386.2012.724048.
  8. McConnell, Brenna; Gradinger, Rolf; Iken, Katrin; Bluhm, Bodil. Growth rates of arctic juvenile Scolelepis squamata (Polychaeta: Spionidae) isolated from Chukchi Sea fast ice. Polar Biology 2012; Volum 35 (10). ISSN 0722-4060.s 1487 – 1494.s doi: 10.1007/s00300-012-1187-2.
  9. Bluhm, Bodil; Gebruk, A; Gradinger, Rolf; Hopcroft, Russell R.; Huettmann, Falk; Kosobokova, Ksenia N.; Sirenko, Boris; Weslawski, Jan Marcin. Arctic Marine Biodiversity: An Update of Species Richness and Examples of Biodiversity Change. Oceanography 2011; Volum 24 (3). ISSN 1042-8275.s 232 – 248.s doi: 10.5670/oceanog.2011.75.
  10. Gradinger, Rolf; Bluhm, Bodil; Iken, Katrin. Arctic sea-ice ridges—Safe heavens for sea-ice fauna during periods of extreme ice melt?. Deep-sea research. Part II, Topical studies in oceanography 2010; Volum 57 (1-2). ISSN 0967-0645.s 86 – 95.s doi: 10.1016/j.dsr2.2009.08.008.
  11. Gradinger, Rolf; Bluhm, Bodil. Timing of Ice Algal Grazing by the Arctic Nearshore Benthic Amphipod Onisimus litoralis. Arctic 2010; Volum 63 (3). ISSN 0004-0843.s 355 – 358.s doi: 10.14430/arctic1498.

 

Photo of Mats Granskog

Mats Granskog

Senior Research Scientist

Research interests:
  • Physical-chemical-biological coupling in Arctic sea ice and upper ocean
  • Marine optics (sea ice and upper ocean) especially inherent optical properties
  • Spectroscopic characterization of dissolved organic matter (CDOM and FDOM)
  • Arctic sea ice mass balance.
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Norwegian Polar InstituteOceans and sea ice Work address Norwegian Polar Institute Fram Centre Tromsø 9296 Norway Work Phone: +47 96 94 71 22 Website: NPI employee page Website: ResearchGate Website: ORCID

Research interests:

  • Physical-chemical-biological coupling in Arctic sea ice and upper ocean
  • Marine optics (sea ice and upper ocean) especially inherent optical properties
  • Spectroscopic characterization of dissolved organic matter (CDOM and FDOM)
  • Arctic sea ice mass balance.

Running projects:

  • 2018-2022: Ridges – Safe havens for ice-associated flora and fauna in a seasonally ice-covered Arctic Ocean (HAVOC/MOSAiC), RCN, PI
  • 2019-2020: DEvelopment of snow/ice/ecosystem models using winter-to-summer ARctic observations of coupled snow, ice, and ecosystem processes (DEARice), EU H2020, co-PI
  • 2019-2022: The Coordinated Arctic Acoustic Thermometry Experiment (CAATEX), RCN project, co-PI
  • 2016-2020 Developing and Advancing Seasonal Predictability of Arctic Sea ice (SPARSE), (RCN project), co-PI
  • 2017-2023: The Nansen Legacy (RCN project), Research Foci 1, partner

Completed projects:

  • 2015-2020: Norwegian young sea ICE expedition (N-ICE), Chief Scientist
  • 2015-2018: Boom or Bust – Ice-algal and under-ice phytoplankton bloom dynamics in a changing Arctic icescape (RCN project), Co-PI

Publications:

Overview over all publications

Photo of Ulrike Grote

Ulrike Grote

ARCTOS secretary

Research interests:
  • Calanoid copepod ecology and physiology with focus on Arctic species
  • Impact of climate change especially increasing temperature on calanoid copepods
  • Phenotypic plasticity and its importance for adaptation to climate change
Relevant scientific publications:
  1. Grote U, Pasternak A, Arashkevich E, Halvorsen E, Nikishina A (2015) Thermal response of ingestion and egestion rates in the Arctic copepod Calanus glacialis and possible metabolic consequences in a warming ocean.
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UiT The Arctic University of NorwayArctic and Marine Biology Work address Department of Arctic and Marine Biology Faculty of Biosciences, Fisheries and Economics UiT The Arctic University of Norway Tromsø 9037 Work Phone: +47 776 46825

Research interests:

  • Calanoid copepod ecology and physiology with focus on Arctic species
  • Impact of climate change especially increasing temperature on calanoid copepods
  • Phenotypic plasticity and its importance for adaptation to climate change

Relevant scientific publications:

  1. Grote U, Pasternak A, Arashkevich E, Halvorsen E, Nikishina A (2015) Thermal response of ingestion and egestion rates in the Arctic copepod Calanus glacialis and possible metabolic consequences in a warming ocean. Polar Biology 38: 1025-1033. doi: 10.1007/s00300-015-1664-5
  2. Alcaraz M, Felipe J, Grote U, Arashkevich E, Nikishina A (2014) Life in a warming ocean: thermal thresholds and metabolic balance of arctic zooplankton. Journal of Plankton Research 36: 3-10. doi: 10.1093/plankt/fbt111
  3. Pasternak A, Arashkevich E, Grote U, Nikishina A, Solovyev K (2013) Different effects of increased water temperature on egg production of Calanus finmarchicus and C. glacialis. Oceanology 53: 547-553. doi: 10.1134/s0001437013040085

Popular science and outreach:

  • Spring 2015: visit by 4-6 year-old children from Bymyra kindergarten – living benthic and pelagic animals to observe and touch
  • Spring 2015: visit of 11th grade German school class – lecture ‘Arctic biology studies in Tromsø and the Arctic marine ecosystem’ and little excursion of the NFH building including looking at living benthic and pelagic animals
  • Autumn 2011: visit of 11th grade German school class – lecture ‘Calanus in the Arctic’ and lab work ‘identifying zooplankton’.