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2nd MARDI workshop: Harmonisation of (sub)Arctic diatom taxonomy

Helsinki, Finland
Workshop report
Contact person
Kaarina Weckström
E-Mail address
Working groups
Meeting Category


Workshop title: Harmonisation of (sub)Arctic diatom taxonomy
Date:  6-8 June
Location: Ecosystems and Environment Research Programme (ECOENV), University of Helsinki, Finland

Workshop details

The workshop will be dedicated to integrating and agreeing upon a common taxonomy for all datasets. A key outcome of this workshop will be an outline of a taxonomic guide that includes descriptions of species morphology and ecology, images, and geographical distribution. This workshop will be hands-on: participants are encouraged to bring their own samples/slides and microscopes will be available. 

This workshop is the 2nd in the series of 4 planned MARDI (Marine ARctic DIatoms) workshops, each of which builds on the previous workshop and plays a crucial part in achieving the overall MARDI goals.

This “on site” workshop will be followed by:

1) several online open-to-all taxonomic mini-workshops on taxonomically difficult key taxa that will be broadcast and archived online; and
2) gradual collection and archiving of diatom species information to online databases.

Preliminary program

Workshop runs Tuesday 6 June 09:00 through Thursday 8 June noon.

Discussion topics and activities:

  • Status of pan-Arctic diatom database: presentation of different datasets and taxonomy issues

  • Problematic taxa and main challenges in Arctic marine diatom taxonomy

  • Sample preparation and counting methods

  • Laboratory visit 

  • Multiple microscope sessions

Key participants

  • Kaarina Weckström, University of Helsinki, Finland, organiser

  • ECR Tiia Luostarinen, University of Helsinki, Finland, organiser

  • ECR Mimmi Oksman, Geological Survey of Denmark and Greenland, Denmark, organiser

  • Beth Caissie, US Geological Survey, USA

  • Christof Pearce, Aarhus University, Denmark

  • Audrey Limoges, University of New Brunswick, Canada

  • Diana Krawczyk, Greenland Climate Research Center, Denmark

  • Arto Miettinen, University of Helsinki, Council of Finnish Academies, Finland

  • Jian Ren, Key Laboratory of Marine Ecosystem Dynamics of the Ministry of Natural Resources, China

  • ECR Adrian Kryk, University of Szczecin, Poland

  • ECR Joshua Evans, University of New Brunswick, Canada


Deadline for registration: 31 March
> Register

Financial Support

Funding to cover accommodation, breakfasts & lunches, and (limited) travel expenses is available thanks to financial support from PAGES to the MARDI workshop. Early-career researchers will be prioritized if the demand for support exceeds the available funding.

We have reserved a block of rooms at EuroHostel Helsinki ( for participants from 5-8 June. The accommodation will be in double rooms (43,80 euros/night/person) with shared bathrooms, and breakfast is included. A limited number of single rooms (69,30 euros/night/person) is available upon request.

More information

> Visit the MARDI webpage