Journal of Applied Phycology

, Volume 21, Issue 4, pp 471–482

Harmonization is more important than experience—results of the first Nordic–Baltic diatom intercalibration exercise 2007 (stream monitoring)

  • Maria Kahlert
  • Raino-Lars Albert
  • Eeva-Leena Anttila
  • Roland Bengtsson
  • Christian Bigler
  • Tiina Eskola
  • Veronika Gälman
  • Steffi Gottschalk
  • Eva Herlitz
  • Amelie Jarlman
  • Jurate Kasperoviciene
  • Mikołaj Kokociński
  • Helen Luup
  • Juha Miettinen
  • Ieva Paunksnyte
  • Kai Piirsoo
  • Isabel Quintana
  • Janne Raunio
  • Bernt Sandell
  • Heikki Simola
  • Irene Sundberg
  • Sirje Vilbaste
  • Jan Weckström
Article

DOI: 10.1007/s10811-008-9394-5

Cite this article as:
Kahlert, M., Albert, RL., Anttila, EL. et al. J Appl Phycol (2009) 21: 471. doi:10.1007/s10811-008-9394-5

Abstract

The goal of this study was a harmonization of diatom identification and counting among diatomists from the Scandinavian and Baltic countries to improve the comparison of diatom studies in this geographical area. An analysis of the results of 25 diatomists following the European standard EN 14407 during an intercalibration exercise showed that a high similarity was achieved by harmonization and not because of a long experience with diatoms. Sources of error were wrong calibration scales, overlooking of small taxa, especially small Navicula s.l., misidentifications (Eunotia rhomboidea was mistaken for Eunotia incisa) and unclear separation between certain taxa in the identification literature. The latter was discussed during a workshop with focus on the Achnanthes minutissima group, the separation of Fragilaria capucina var. gracilis from F. capucina var. rumpens, and Nitzschia palea var. palea from N. palea var. debilis. The exercise showed also that the Swedish standard diatom method tested here worked fine with acceptable error for the indices IPS (Indice de Polluo-sensibilité Spécifique) and ACID (ACidity Index for Diatoms) when diatomists with a low similarity (Bray–Curtis <60%) with the auditor in at least one of the samples are excluded.

Keywords

Diatoms Monitoring Streams Intercalibration exercise Diatom index Nordic–Baltic region 

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Maria Kahlert
    • 1
  • Raino-Lars Albert
    • 2
  • Eeva-Leena Anttila
    • 3
  • Roland Bengtsson
    • 4
  • Christian Bigler
    • 5
  • Tiina Eskola
    • 6
  • Veronika Gälman
    • 7
  • Steffi Gottschalk
    • 1
  • Eva Herlitz
    • 1
  • Amelie Jarlman
    • 8
  • Jurate Kasperoviciene
    • 9
  • Mikołaj Kokociński
    • 10
  • Helen Luup
    • 11
  • Juha Miettinen
    • 2
  • Ieva Paunksnyte
    • 12
  • Kai Piirsoo
    • 11
  • Isabel Quintana
    • 1
  • Janne Raunio
    • 13
  • Bernt Sandell
    • 14
  • Heikki Simola
    • 15
  • Irene Sundberg
    • 16
  • Sirje Vilbaste
    • 11
  • Jan Weckström
    • 17
  1. 1.Department of Aquatic Sciences and AssessmentSwedish University of Agricultural SciencesUppsalaSweden
  2. 2.EcomonitorJoensuuFinland
  3. 3.Department of GeographyUniversity of OuluOuluFinland
  4. 4.MikroalgTorpsbrukSweden
  5. 5.Department of Ecology and Environmental ScienceUmeå UniversityUmeåSweden
  6. 6.Institution of GeosciencesUniversity of OuluOuluFinland
  7. 7.Environmental Change Assessment Group, Department of Ecology and Environmental ScienceUmeå UniversityUmeåSweden
  8. 8.JARLMAN HBLundSweden
  9. 9.Laboratory of Hydrobotany, Institute of BotanyVilniusLithuania
  10. 10.Adam Mickiewicz University, Collegium PolonicumSłubicePoland
  11. 11.Institute of Agricultural and Environmental SciencesEstonian University of Life SciencesTartuEstonia
  12. 12.Hydrobiology and Ecotoxicology Division, Environmental Research Department, Environmental Protection AgencyVilniusLithuania
  13. 13.Water and Environment Association of the River KymiKouvolaFinland
  14. 14.BS SötvattenkonsultJönköpingSweden
  15. 15.Ecological Research Institute, Faculty of BiosciencesUniversity of JoensuuJoensuuFinland
  16. 16.Medins Biologi ABMölnlyckeSweden
  17. 17.Environmental Change Research Unit (ECRU), Department of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland

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