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

Kelly, M; Urbanic, G; Acs, E; Bennion, H; Bertrin, V; Burgess, A; Denys, L; ... Varbiro, G; + view all (2014) Comparing aspirations: intercalibration of ecological status concepts across European lakes for littoral diatoms. Hydrobiologia , 734 (1) pp. 125-141. 10.1007/s10750-014-1874-9. Green open access

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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.

Type: Article
Title: Comparing aspirations: intercalibration of ecological status concepts across European lakes for littoral diatoms
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10750-014-1874-9
Publisher version: http://dx.doi.org/10.1007/s10750-014-1874-9
Language: English
Additional information: The final publication is available at Springer via http://dx.doi.org/10.1007/s10750-014-1874-9.
Keywords: Water Framework Directive, Lake, Phytobenthos, Diatoms, Intercalibration, Ecological status
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/1433065
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