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dc.contributor.authorVelle, Gaute
dc.contributor.authorBirkeland, Ina Bakke
dc.contributor.authorJohannessen, Arne
dc.contributor.authorLandås, Torunn Svanevik
dc.descriptionProject manager Kari Austnesnb_NO
dc.description.abstractTwo laboratories participated in the 23rd biological intercalibration of invertebrates in the ICP Waters programme. The intercalibration is important for harmonising taxonomic work across countries and is of high value where the focus is on community analyses, e.g. for the classification of ecological status according to the EU Water Framework Directive. The laboratories correctly identified a high proportion of the specimens in the test samples. In total, 97 % of the species and 98 % of the genera were correctly identified. With a mean Quality assurance index (Qi) of 92 and 98, the laboratories performed well above the threshold for acceptable taxonomic work (Qi 80). Trends in the biological intercalibration over time indicate that an average of five laboratories have participated. The results show that the mean Qi has remained above 80% for the full period, suggesting skilled taxonomists in the laboratories affiliated to ICP Waters. When the Qi is broken into invertebrate groups, the laboratories, on average, perform best for caddis flies and worst for stoneflies. The mean Qi decreased steeply in 2015-2017. According to the taxonomists that participate, this may be mostly due to an increase in difficulty. The quality has increased since 2017 while the difficulty remains high.nb_NO
dc.description.sponsorshipNorwegian Environment Agency United Nations Economic Commission for Europe (UNECE)nb_NO
dc.publisherNorsk institutt for vannforskningnb_NO
dc.relation.ispartofseriesICP Waters report;140/2019
dc.rightsNavngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal*
dc.titleBiological intercalibration: Invertebrates 2019nb_NO
dc.typeResearch reportnb_NO
dc.rights.holder© Norsk institutt for vannforskning/Norwegian Institute for Water Research.nb_NO

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Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal
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