Identification versus counting protocols as sources of uncertainty in diatom-based ecological status assessments

Kahlert, Maria; Kelly, Martyn; Albert, Raino-Lars; Almeida, Salomé F.P.; Bešta, Tomáš; Blanco, Saúl; Coste, Michel; Denys, Luc; Éctor, Luc; Fránková, Markéta; Hlúbiková, Daša; Ivanov, P.; Kennedy, Bryan; Marvan, Petr; Mertens, Adrienne; Miettinen, Juha; Picińska-Fałtynowicz, Joanna; Rosebery, Juliette; Tornés, Elisabet; Vilbaste, Sirje; Vogel, Andrea

doi:10.1007/s10750-012-1115-z

Cited by 61 publications

(22 citation statements)

References 18 publications

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“…However, while national/regional identification exercises may reduce variation within a country (or region), they can, potentially, perpetuate systematic errors among countries and regions (Van de Vijver & van Dam, 2010 ;Kahlert et al, 2012 ). We, therefore propose a European-wide communication of QA of diatom counts to inform about national and regional workshop results.…”

Section: Tablementioning

confidence: 99%

“…However, this is only possible if datasets can be merged easily. Even though diatom indices have been proven to be quite robust for the assessment of ecological status (Kelly et al, 2009 ;Kahlert et al, 2012 ;Almeida et al, 2014 ), diatom taxa lists can often not be compared directly. The reason for this is the lack of harmonization of diatom identification and counting techniques among regions or countries, which leads to inconsistent diatom datasets if not a form of taxa harmonization is used before analysis (Vyverman et al, 2007 ;Stevenson et al, 2010 ;Kelly et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

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Quality assurance of diatom counts in Europe: towards harmonized datasets

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Section: Tablementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quality assurance of diatom counts in Europe: towards harmonized datasets

et al. 2016

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“…In this context, Jonathan Taylor explained the development of a new diatom index for South African rivers and streams. Maria Kahlert presented the results of the first European practical diatom intercalibration exercise/ring-test (Kahlert et al, 2012, this issue).…”

Section: Oral Session 5: New Methodologies and Intercalibration Exercisementioning

confidence: 99%

“…The results of this ring-test are published in the present issue of Hydrobiologia (Kahlert et al, 2012).…”

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Preface: Use of algae for monitoring rivers

Éctor¹,

Hlúbiková²,

Hoffmann³

2012

Hydrobiologia

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on sharing experiences in the use of algae to monitor river water quality.The Luxembourg symposium provided the opportunity to present new approaches and innovative methods in bioindication and use of various algal groups in water quality monitoring in different types of water bodies. The symposium also focused on uncovering the major gaps and uncertainties in existing methods or recent adaptations, as well as experiences with the application of these methods and intercalibration exercises.During the symposium, invited speakers had the opportunity to present their research activities and results in plenary sessions. The main sessions focused on the following topics: algal ecology, toxicology (including cyanotoxins), river phytoplankton and phytobenthos monitoring, implementation of the Water Framework Directive (WFD), water quality monitoring in different countries. This 7th Symposium gathered about 80 participants and included 87 contributions (6 keynote conferences, 26 oral presentations and 55 poster presentations), submitted by researchers from 34 countries around the world:

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“…-to ensure the comparability of diatom counting results among diatomists when implementing the Water Framework Directive, -to facilitate a uniform approach for dealing with taxonomic problems, and -to perform the basic quality control for diatom counting results (KELLY 2001, PRYGIEL et al 2002, KAHLERT et al 2012). In Germany, the fi rst intercalibration exercise for benthic diatoms was conducted in 2011 and 2012 to improve the application of the German instruction protocol that assesses the water quality of lakes and rivers using diatoms according to the European Water Framework Directive (SCHAUMBURG et al 2006(SCHAUMBURG et al , 2007(SCHAUMBURG et al , 2011.…”

Section: Introductionmentioning

confidence: 99%

Applied use of taxonomy: lessons learned from the first German intercalibration exercise for benthic diatoms

Dreßler¹,

Verweij²,

Kistenich³

et al. 2015

Acta Botanica Croatica

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-The fi rst German intercalibration exercise for benthic diatoms was conducted to improve the application of the implementation of the European Water Framework Directive for running waters and lakes in Germany. The intercalibration exercise revealed several taxonomic problems. Among others, considerable problems occurred with identifying and differentiating species of the following four groups: (I) Amphora indistincta Levkov and A. pediculus (Kützing) Grunow, (II) Cocconeis placentula var. euglypta Ehrenberg and C. placentula var. lineata (Ehrenberg) Van Heurck, (III) Navicula cryptotenella Lange-Bertalot and N. cryptotenelloides Lange-Bertalot and (IV) N. reichardtiana Lange-Bertalot and N. caterva Hohn & Hellermann. The taxonomic problems that emerged occurred due to both insuffi cient use of given taxonomic details (by limnologists) and ambiguous species descriptions and documentation (by taxonomists). Thus, we recommend to the applied limnologist to use the mandatory identifi cation literature and to document any ambiguous valves during routine counts. Also, it would be desirable to further investigate certain species by taxonomists and, in general, to provide more basic data with species descriptions or in identifi cation manuals. These measures will improve the use of diatoms as bioindicators and consequently benefi t both applied limnologists and taxonomists.

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Identification versus counting protocols as sources of uncertainty in diatom-based ecological status assessments

Cited by 61 publications

References 18 publications

Quality assurance of diatom counts in Europe: towards harmonized datasets

Quality assurance of diatom counts in Europe: towards harmonized datasets

Preface: Use of algae for monitoring rivers

Applied use of taxonomy: lessons learned from the first German intercalibration exercise for benthic diatoms

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