Comparing aspirations: Intercalibration of ecological status concepts across European lakes for littoral diatoms

Martyn Kelly, Gorazd Urbanic, Eva Acs, Helen Bennion, Vincent Bertrin, Amy Burgess, Luc Denys, Steffi Gottschalk, Maria Kahlert, Satu Maaria Karjalainen, Bryan Kennedy, Gorazd Kosi, Aldo Marchetto, Soizic Morin, Joanna Picinska-Fałtynowicz, Sandra Poikane, Juliette Rosebery, Ilka Schoenfelder, Joerg Schoenfelder, Gabor Varbiro

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Eleven European countries participated in an exercise to harmonise diatom-based methods used for status assessment in lakes. Lakes were divided into low, medium and high alkalinity types for this exercise. However, it was not possible to perform a full intercalibration on low alkalinity lakes due to the short gradient and confounding factors. Values of the Trophie Index were computed for all samples in order that national datasets could all be expressed on a common scale. Not all participants had reference sites against which national methods could be standardised and, therefore, a Generalised Linear Modelling approach was used to control the effect of national differences in datasets. This enabled the high/good and good/moderate status boundaries to be expressed on a common scale and for deviations beyond ±0.25 class widths to be identified. Those countries which had relaxed boundaries were required to adjust these to within ±0.25 class widths whilst the intercalibration rules allowed those countries with more stringent boundaries to retain these. Despite biogeographical and typological differences between countries, there was broad agreement on the characteristics of high, good and moderate status diatom assemblages, and the exercise has ensured consistent application of Water Framework Directive assessments around Europe.

Original languageEnglish
Pages (from-to)125-141
Number of pages17
JournalHydrobiologia
Volume734
Issue number1
DOIs
Publication statusPublished - Aug 2014

Keywords

  • Diatoms
  • Ecological status
  • Intercalibration
  • Lake
  • Phytobenthos
  • Water Framework Directive

ASJC Scopus subject areas

  • Aquatic Science

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    Kelly, M., Urbanic, G., Acs, E., Bennion, H., Bertrin, V., Burgess, A., Denys, L., Gottschalk, S., Kahlert, M., Karjalainen, S. M., Kennedy, B., Kosi, G., Marchetto, A., Morin, S., Picinska-Fałtynowicz, J., Poikane, S., Rosebery, J., Schoenfelder, I., Schoenfelder, J., & Varbiro, G. (2014). Comparing aspirations: Intercalibration of ecological status concepts across European lakes for littoral diatoms. Hydrobiologia, 734(1), 125-141. https://doi.org/10.1007/s10750-014-1874-9