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> Home > Nature and climate > Sea ice > ArcGen

ArcGen - Arctic fjords as archives of microevolution in a warming climate



This project brings together the fields of climate research and marine genomics, and is aimed at investigating evolution as a response to climate change in Arctic marine phytoplankton.

Sediment records from Godthåbsfjord, a sub-arctic fjord in SW Greenland, were retrieved, dated and screened for living intact resting stages of phytoplankton (living cells were found down to core depths dated to 80-100 years-old!).

The records were further studied in terms of geochemical elements (XRF), microfossils, and sedimentological properties (TOC, grain size) back to before the 1900’s, i.e. ca. the Little Ice Age termination in Greenland.

After single-cell isolation and germination of the resting stages, a time-series of ca. 70 clonal strains was genotyped using Amplified Fragment Length Polymorphism (AFLP), a sensitive genetic fingerprinting technique.

This project will be the first to link climate variability and changes in phytoplankton genetic structure over time in an Arctic setting.

Contact:
Project PI Sofia Ribeiro, sri@geus.dk

Funding:
Carlsberg Foundation, Denmark

Main project partners:
Karin Rengefors (Lund University, Sweden); Marianne Ellegaard, Thorbjørn J. Andersen (University of Copenhagen); Søren Rysgaard (ARC, Aarhus University). Sediment coring campaign in Godthåbsfjord on board R/V Sanna (2012) in collaboration with Naja Mikkelsen (GEUS) and Ann Lennert (GCRC).

ArcGen