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Monday, 20 May 2013 21:58
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4th Nordic-Baltic diatom intercalibration/harmonization exercise 2013

Dear Nordic-Baltic diatom colleagues!
(please spread the letter to anybody in our region who might be interested)

Please feel invited to the fourth Nordic-Baltic diatom intercalibration/harmonization exercise. For those unfamiliar with the first exercises in 2007, 2009 and 2011, please check the webpage http://www.norbaf.net for information on the results.

The intercalibration is organized by NorBAF (Nordic Network - Benthic Algae in Freshwater, www.norbaf.net) and the Department of Aquatic Sciences and Assessment, SLU (Swedish University of Agricultural Sciences, http://www.slu.se/vatten-miljo).

It is important to harmonize the diatom identification of the Nordic-Baltic diatomists in order to improve comparisons between different diatom studies, especially as diatom monitoring has increased because of the Water Framework Directive. Based on the experience from the activities in 2007, 2009 and 2011, the NorBAF participants agreed to continue with diatom intercalibrations every second year. SWEDAC (Swedish Board for Accreditation and Conformity Assessment) is informed about our activities and the participation of Swedish laboratories and consultants.

For more details please visit the NORBAF homepage http://www.norbaf.net


The results will be discussed during a workshop held at Norr Malma field station, Lake Erken, 18.-20. November 2013 (similar to 2006, 2007 and 2011). All participants are invited to participate and discuss the results, and also discuss solutions to problematic taxa groups. We will also discuss new literature and new insights gained by the ongoing taxonomical collection done by Amelie Jarlman and Bart van de Vijver. You are welcome to bring own samples if you wish.


It is possible to connect the workshop participation with the participation in the Nordic Diatomists' Meeting 20.-22. November 2013 held at the same place. The price for that meeting is 1100 SEK including VAT (300 SEK extra for single room, if available). Contact Maria Kahlert if you wish to stay for both meetings.


  • Before 30 June 2013 – Announcement of participation and address (to which the samples will be sent) to Maria Kahlert (maria . kahlert  AT slu . se). Please send as well your invoice address and invoice reference number, if applicable.
  • May-July 2013 – Samples will be sent to the participants
  • 15 October 2011 - Results must be sent to Maria Kahlert (maria.kahlert@ slu.se)

Kind regards,
Maria Kahlert, NORBAF network coordinator


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