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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Photo of Adele Westgård

Adele Westgård

PhD candidate

PhD project title: Evolution of Surface Ocean hydrography in the Nordic Seas during warmer-than-present time periods: proxy development and applications.…Read More
UiT The Arctic University of NorwayDepartment of Geosciences Work Department of Geosciences Faculty of Science and Technology UiT The Arctic University of Norway Tromsø 9037 Norway Website: UiT staff page

PhD project title:

Evolution of Surface Ocean hydrography in the Nordic Seas during warmer-than-present time periods: proxy development and applications.

PhD project description:

In my project, I aim to develop methods for reconstructing surface ocean conditions and ocean-cryosphere interactions during past warmer-than-present periods in the Arctic. To do so, I am culturing the polar, planktic foraminifera (single-celled protist) Neogloboquadrina pachyderma under independently variable conditions and investigating the relationships between ocean conditions (salinity, temperature, pH, etc.) and the chemical composition of the foraminifera shells. I will then apply these methods (and others) to sedimentary records from the Arctic Ocean and Nordic Seas to reconstruct past conditions of these regions. A secondary objective is to observe the foraminifera in the laboratory, including their tolerance and response to changing water conditions such as increased temperature and lower pH, which has implications for the ongoing climate change. If successful, will the new methods provide a powerful toolbox for reconstructing surface ocean hydrography and circulation at high latitudes.

Start date: May 3, 2021
Planned submission date: spring 2025

Supervisors:

Mohamed M. Ezat (UiT, Tromsø, Norway)
Julie Meilland (Marum, Bremen, Germany)
Gavin L. Foster (University of Southhampton, UK)

Photo of Ingrid Wiedmann

Ingrid Wiedmann

Post-doctoral researcher

Research interests: My present research activities focus on the vertical flux of organic biomass and sinking particles (> 50 μm) in high latitude regions (Barents Sea; Adventfjorden, Svalbard) and potential drivers of major sedimentation events such a turbulence, upward nitrate flux, phytoplankton and zooplankton composition, or glacial run-off.…Read More
UiT The Arctic University of NorwayArctic and Marine Biology Work Department of Arctic and Marine Biology Faculty of Biosciences, Fisheries and Economics UiT The Arctic University of Norway Tromsø 9037 Norway Work Phone: +47 77 64 42 14 Website: ARCEx – Research Centre for Arctic Petroleum Exploration

Research interests:

My present research activities focus on the vertical flux of organic biomass and sinking particles (> 50 μm) in high latitude regions (Barents Sea; Adventfjorden, Svalbard) and potential drivers of major sedimentation events such a turbulence, upward nitrate flux, phytoplankton and zooplankton composition, or glacial run-off. This meets my research interests of field-based research with a major focus on physical-biological interactions.

Running national and international projects:

  • ARCEx – Research Centre for Arctic Petroleum Exploration
  • CarbonBridge – Bridging marine productivity regimes: How Atlantic advective inflow affects productivity, carbon cycling and export in a melting Arctic Ocean

Completed national and international projects:

  • CONFLUX – Fate of organic material in the ocean: Controlling mechanisms in vertical flux regulation

Relevant scientific publications:

  1. Wiedmann, I., Reigstad, M., Marquardt, M., Vader, A., Gabrielsen, T.M. Seasonality of vertical flux and sinking particle characteristics in an ice-free Arctic fjord – different from subarctic fjords? Journal of Marine Systems, accepted for publication.
  2. Wiedmann, I., Reigstad, M., Sundfjord, A., Basedow, S. Potential drivers of sinking particles’ size spectra and vertical flux of particulate organic carbon (POC): Turbulence, phytoplankton and zooplankton. Journal of Geophysical Research: Oceans, 119 (10), 6900-6917.

 

Photo of Anette Wold

Anette Wold

Chief engineer

Research interests:
  • Plankton ecology with a main emphasis on phytoplankton and zooplankton
  • The impact of changing sea ice conditions and associated effects on phytoplankton and ice algal communities
  • Ecosystem structure and energy flow of Arctic marine food webs including fatty acid throphic markers and stable isotope studies.
    • …
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Norwegian Polar InstituteResearch department: ecotoxicology Work Norwegian Polar Institute Fram Centre Tromsø 9296 Norway Work Phone: +47 77 75 05 46

Research interests:

  • Plankton ecology with a main emphasis on phytoplankton and zooplankton
  • The impact of changing sea ice conditions and associated effects on phytoplankton and ice algal communities
  • Ecosystem structure and energy flow of Arctic marine food webs including fatty acid throphic markers and stable isotope studies.

Running national and international projects:

  • The Nansen Legacy (2018-2022)
  • Arctic Ecosystem Monoitoring: Pelagic study in Kongsfjorden (2010->)
  • MOSJ: Pelagic study in Kongsfjorden (2009->)

Completed national and international projects:

  • N-ICE2015: Ecosystem dynamics in a high-Arctic pack ice environment (5 Jan 2015–30 Jun 2015)
  • CLEOPATRA II: Climate effects on planktonic food quality and trophic transfer in the Arctic marginal ice zone (1 Jul 2012–30 Jul 2015)

Relevant scientific publications:

  1. Hop H, Wold A, Vihtakari M, Daase M, Kwasniewski S, Gluchowska M, Lischka S, Buchholz F, Falk-Petersen S (accepted) Zooplankton in Kongsfjorden (1996-2016) in relation to climate change. Advances in Polar Ecology
  2. Darnis G, Wold A, Falk-Petersen S, Graeve M, Fortier L (2018) Could offspring predation offset the successful reproduction of the arctic copepod Calanus hyperboreus under reduced sea-ice cover conditions? Progress in Oceanography 170: 107:118. https://doi.org/10.1016/j.pocean.2018.11.004
  3. Fernández-Méndez M, Olsen LM, Kauko HM, Meyer A, Rösel A, Merkouriadi I, Mundy CJ, Ehn JK, Johansson MA, Wagner PM, Ervik Å, Sorrell BK, Duarte PM, Wold A, Hop H, Assmy P (2018) Algal hot spots in a changing Arctic Ocean: Sea-ice ridges and the snow-ice interface. Frontiers in Marine Science
  4. Brown TA, Assmy P, Hop H, Wold A, Belt S (2017) Transfer of ice algae carbon to ice associated amphipods in the high-Arctic pack ice environment. J. Plankton Res. 00(00): 1–11. doi:10.1093/plankt/fbx030
  5. Haug T, Falk-Petersen S, Greenacre M, Hop H, Lindstrøm U, Meier S, Nilssen KT, Wold A (2017). Trophic level and fatty acids in harp seals compares with common minke whales in the Barents Sea. Marin. Biol. Res. doi.org/10.1080/17451000.2017.1313988
  6. Darnis G, Hobbs L, Geoffroy M, Grenvald JC, Renaud PE, Berge J, Cottier F, Kristiansen S, Daase M, Søreide J, Wold A, Morata N, Gabrielsen T (2017). From polar night to midnight sun: Diel vertical migration, metabolism and biogeochemical role of zooplankton in a high Arctic fjord (Kongsfjorden, Svalbard). Limnol. Oceanogr., doi: 10.1002/lno.10519.
  7. Assmy P, Fernández-Méndez M, Duarte P, Meyer A, Randelhoff A, Mundy CJ, Olsen LM, Kauko HM, Bailey A, Chierici M, Cohen L, Doulgeris AP, Ehn JK, Fransson A, Gerland S, Hop H, Hudson SR, Hughes N, Itkin P, Johnsen G, King JA, Koch BP, Koenig Z, Kwasniewski S, Laney SR, Nicolaus M, Pavlov AK, Polashenski CM, Provost C, Rösel A, Sandbu M, Spreen G, Smedsrud LH, Sundfjord A, Taskjelle T, Tatarek A, Wiktor J, Wagner PM, Wold A, Steen H, Granskog MA (2017). Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice. Scientific Reports 7:40850 DOI:10.1038/srep40850
  8. Fransson A, Chierici M, Hop H, Findlay HS, Kristiansen S, Wold A (2016) Late winter-to-summer change in ocean acidification state in Kongsfjorden, with implications for calcifying organisms. Polar Biology 39:1841:1857. DOI 10.1007/s00300-016-1955-5
  9. Dalpadado P, Hop H, Rønning J, Pavlov V, Sperfeld E, Buchholz F, Rey A, Wold A (2015) Distribution and abundance of euphausiids and pelagic amphipods in Kongsfjorden, Isfjorden and Rijpfjorden (Svalbard) and changes in their relative importance as key prey in a warming marine ecosystem. Polar Biol. DOI 10.1007/s00300-015-1874-x
  10. Mayzaud, P., Falk-Petersen, S., Noyon, M., Wold, A., Boutoute, M. 2015. Lipid composition of three co-existing Calanus species in the Arctic: impact of season, location and environment. Polar Biology, DOI:10.1007/s00300-015-1725-9
  11. Zarubin, M., Genin, A., Falk-Petersen, S., Wold, A., Farstey, V. 2014. Intraspecific differences in lipid content of Calanoid copepods across fine-scale depth ranges within the photic layer. Plos One 9(3). DOI:10.1371/journal.pone.0092935
  12. Blachowiak-Samolyk, K., Anna-Maria, K., Falk-Petersen, S., Wold, A., Hegseth, E.N., Wiktor, J. 2014. Winter Tales: The dark side of planktonic life. Polar Biology 38(1):23-36. DOI:10.1007/s00300-014-1597-4
  13. Daase, M., Falk-Petersen, S., Varpe, Ø., Darnis, G., Søreide, J.E., Wold, A., Leu, E., Berge, J., Philippe, B., Fortier, L. 2013. Timing of reproductive events in the marine copepod Calanus glacialis: a pan-Arctic perspective. Canadian Journal of Fisheries and Aquatic Sciences 70(6): 871–884. DOI:10.1139/cjfas-2012-0401
  14. Berge, J., Varpe, Ø., Moline, M.A., Wold, A., Renaud, P.E., Daase, M., Falk-Petersen, S. 2012. Retention of ice-associated amphipods: possible consequences for an ice-free Arctic Ocean. Biology Letters 8(6): 1012–1015.
    DOI:10.1098/rsbl.2012.0517
  15. Wold, A., Darnis, G., Soreide, J.E., Leu, E., Philippe, B., Fortier, L., Poulin, M., Kattner, G., Graeve, M., Falk-Petersen, S. 2011. Life strategy and diet of Calanus glacialis during the winter-spring transition in Amundsen Gulf, south-eastern Beaufort Sea. Polar Biology 34(12): 1929–1946. DOI:10.1007/s00300-011-1062-6
  16. Rabindranath, A., Daase, M., Falk-Petersen, S., Wold, A., Wallace, M.I., Berge, J., Brierley, A.S. 2011. Seasonal and diel vertical migration of zooplankton in the High Arctic during autumn midnight sun of 2008. Marine Biodiversity 41(3): 365–382. DOI:10.1007/s12526-010-0067-7
  17. Wold, A., Jæger, I., Hop, H., Gabrielsen, G.W., Falk-Petersen, S. 2011. Arctic seabird food chains explored by fatty acid composition and stable isotopes in Kongsfjorden, Svalbard. Polar Biology 34(8): 1147–1155.
    DOI:10.1007/s00300-011-0975-4
  18. Falk-Petersen, S., Leu, E., Berge, J., Kwasniewski, S., Nygard, H., Rostad, A., Keskinen, E., Thormar, J., Quillfeldt, C.H.v., Wold, A., Gulliksen, B. 2008. Vertical migration in high Arctic waters during autumn 2004. Deep Sea Research Part II: Topical Studies in Oceanography 55(20-21): 2275–2284.
    DOI:10.1016/j.dsr2.2008.05.010
  19. Falk-Petersen, S., Haug, T., Hop, H., Nilssen, K.T., Wold, A. 2008. Transfer of lipids from plankton to blubber of harp and hooded seals off East Greenland. Deep Sea Research Part II: Topical Studies in Oceanography 56(21-22): 2080–2086.
    DOI:10.1016/j.dsr2.2008.11.020
  20. Wold, A., Leu, E., Walkusz, W., Falk-Petersen, S. 2007. Lipids in copepodite stages of Calanus glacialis. Polar Biology 30(5): 655–658.
    DOI:10.1007/s00300-006-0233-3
  21. Cottier, F.R., Tarling, G.A., Wold, A., Falk-Petersen, S. 2006. Unsynchronized and synchronized vertical migration of zooplankton in a high arctic fjord. Limnology and Oceanography 51(6): 2586–2599.
  22. Willis, K., Cottier, F., Kwasniewski, S., Wold, A., Falk-Petersen, S. 2006. The influence of advection on zooplankton community composition in an Arctic fjord (Kongsfjorden, Svalbard). Journal of Marine Systems 61(1-2): 39–54.
    DOI:10.1016/j.jmarsys.2005.11.013
  23. Falk-Petersen, S., Haug, T., Nilssen, K.T., Wold, A., Dahl, T.M. 2004. Lipids and trophic linkages in harp seal (Phoca groenlandica) from the eastern Barents Sea. Polar Research 23(1): 43–50. DOI:10.1111/j.1751-8369.2004.tb00128.x
  24. Wold, A., Norrbin, F. 2004. Vertical migration as a response to UVR stress in Calanus finmarchicus females and nauplii. Polar Research 23(1): 27–34.
    DOI:10.1111/j.1751-8369.2004.tb00126.x

 

Photo of Kasia Zamelczyk

Kasia Zamelczyk

Researcher

Research interests:
  • Marine microfossils (planktic foraminifera and diatom ecology)
  • Ocean acidification
  • Dissolution of carbonates and carbon cycle
  • Paleoclimate and palaeoceanography reconstruction.
    • …
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UiT The Arctic University of NorwayGeology Work Centre for Arctic Gas Hydrate, Environment and Climate Department of Geology UiT The Arctic University of Norway Tromsø 9037 Norway Work Phone: +47 77 64 47 73 Website: CAGE – Centre for Arctic Gas Hydrate, Environment and Climate

Research interests:

  • Marine microfossils (planktic foraminifera and diatom ecology)
  • Ocean acidification
  • Dissolution of carbonates and carbon cycle
  • Paleoclimate and palaeoceanography reconstruction.

Running national and international projects:

  • Effects of ocean chemistry changes on planktonic foraminifera in the Fram Strait: Ocean Acidification from natural to anthropogenic changes

Completed national and international projects:

  • SciencePub project: Arctic Natural Climate and Environmental Changes and Human Adaptation: From Science to Public Awareness

Relevant scientific publications:

  1. Zamelczyk, K., Husum, K., Rasmussen, T.L., Godtliebsen, T.L., Hald, M., 2014. Surface water conditions and calcium carbonate preservation in the Fram Strait during marine isotope stage 2, 28.8–15.4 kyr, Paleoceanography 29, doi: 10.1002/2012PA002448.
  2. Zamelczyk, K., Rasmussen, T.L., Husum, K., Hald, M., 2013. Marine calcium carbonate preservation vs. climate change over the last two millennia in the Fram Strait: Implications for planktic foraminiferal paleostudies. Marine Micropaleontology, doi: 10.1016/j.marmicro.2012.10.001
  3. Zamelczyk, K., Rasmussen, T.L, Husum, K., Haflidason, H., de Vernal, A., Ravna, E.K., Hald, M., Hillaire-Marcel, C., 2012. Paleoceanographic changes and calcium carbonate dissolution in the central Fram Strait during the last 20 ka. Quaternary Research, 78, 405-416, doi:10.1016/j.yqres.2012.07.006
  4. Werner, K., Spielhagen, R.F, Bauch, D., Hass, H.Ch., Kandiano, E.,  Zamelczyk, K., 2011. Atlantic Water advection to the eastern Fram Strait-multiproxy evidence for late Holocene variability. Palaeogeography Palaeoclimatology Palaeoecology 308(3-4), 264-276, doi:10.1016/j.palaeo.2011.05.030.
  5. Spielhagen, R.F, Werner, K., Aagaard-Sørensen, S., Zamelczyk, K., Kandiano, E., Budeus, G., Husum, K., Marchitto, T., Hald, M., 2011. Enhanced modern heat transfer to the Arctic by warm Atlantic Water. Science 331, 450, doi: 10.1126/science.1197397.

Popular science and outreach:

  • Zamelczyk, K., Arctic climate variations in geological perspective- oral presentations during     the “Researches Night” on board MS North Star, Hurtigrutene, 24-25.09.2010
  • Jessen, Simon Pind; Sørensen, Steffen Aagaard; Zamelczyk, Katarzyna. Oceanography, Palaeoceanography and Climate. Part of the Teacher’s Guide to the exhibition TRACK – On the trail of past climate. [Artistic and museum presentation] TRACK – The track of past climate. Science Center in Trondheim, Trondheim, and 6 other cities 2009-2013. 2009
  • Jessen, Simon, Pind , Aagaard-Sørensen, S., Zamelczyk, K. Exhibitions and presentations of current research state during “Science days”, Tromsø, Norway, 2008
  • Jessen, Simon, Pind, Aagaard-Sørensen, S., Zamelczyk, K.,  Expedition exhibition. Traveling plaeogeological exhibition for middle school pupils. Nordnorsk Vitensenteret (Norwegian Science Center of Northern Norway, Tromsø), 2008-2011

 

Photo of Amanda Ziegler

Amanda Ziegler

Post-doctoral researcher

Project description I am currently working as part of the interdisciplinary Nansen Legacy project.…Read More
UiT The Arctic University of NorwayDepartment of Arctic and Marine Biology Home UiT The Arctic University of Norway Faculty of Biosciences, Fisheries and Economics Department of Arctic and Marine Biology Tromsø 9037 Norway Website: Personal website

Project description

I am currently working as part of the interdisciplinary Nansen Legacy project. My work aims to understand spatial and temporal patterns in the benthic food web structure and functioning within the Northern Barents Sea. Changes in sea ice extent/duration/thickness is driving changes to the primary productivity and seasonality of the pelagic ecosystem which is tightly connected to the benthos. I use stable isotopes of carbon and nitrogen to identify the trophic structure of the benthic community and relate the spatial and temporal patterns we observe to changes in the broader ecosystem, such as changes in organic carbon flux to the seafloor.

 

Research interests

  • Polar and deep-sea benthic ecology
  • Pelagic-benthic coupling processes
  • Food web dynamics
  • Marine biodiversity and ecosystem function
  • Disturbance impacts on benthic communities
  • Impacts of glacial processes on benthic communities
  • Ocean stewardship and conservation
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