Cited by 323Environmental DNA in Biodiversity StudiesMicrobial Community Ecology and PhysiologyDiatoms and Algae Research

Metabarcoding vs. morphological identification to assess diatom diversity in environmental studies

Zimmermann, Jonas, Glöckner, Gernot, Jahn, Regine, Enke, Neela, Gemeinholzer, Birgit·2015·Molecular Ecology Resources

Abstract

Diatoms are frequently used for water quality assessments; however, identification to species level is difficult, time‐consuming and needs in‐depth knowledge of the organisms under investigation, as nonhomoplastic species‐specific morphological characters are scarce. We here investigate how identification methods based on DNA (metabarcoding using NGS platforms) perform in comparison to morphological diatom identification and propose a workflow to optimize diatom fresh water quality assessments. Diatom diversity at seven different sites along the course of the river system Odra and Lusatian Neisse from the source to the mouth is analysed with DNA and morphological methods, which are compared. The NGS technology almost always leads to a higher number of identified taxa (270 via NGS vs. 103 by light microscopy LM), whose presence could subsequently be verified by LM. The sequence‐based approach allows for a much more graduated insight into the taxonomic diversity of the environmental samples. Taxa retrieval varies considerably throughout the river system, depending on species occurrences and the taxonomic depth of the reference databases. Mostly rare taxa from oligotrophic parts of the river systems are less well represented in the reference database used. A workflow for DNA‐based NGS diatom identification is presented. 28 000 diatom sequences were evaluated. Our findings provide evidence that metabarcoding of diatoms via NGS sequencing of the V4 region (18S) has a great potential for water quality assessments and could complement and maybe even improve the identification via light microscopy.

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Crossref · 10.1111/1755-0998.12336

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Authors
Zimmermann, J., Glöckner, G., Jahn, R., Enke, N., & Gemeinholzer, B.
Affiliations
  • Justus-Liebig-Universität Gießen (DE)
  • University of Cologne (DE)
  • Botanic Garden and Botanical Museum Berlin (DE)
Corresponding author
Zimmermann, Jonas
Venue
Molecular Ecology Resources
Publisher
Wiley
Published
2014-10-20
Volume
15
Issue
3
Pages
526-542
ISSN
  • 1755-098X (ISSN-L)
  • 1755-0998
OpenAlex
W2089848025
Cited by
317
References
101
Citations by year
2026: 17 · 2025: 23 · 2024: 39 · 2023: 24 · 2022: 21 · 2021: 23 · 2020: 41 · 2019: 26 · 2018: 55 · 2017: 25 · 2016: 14 · 2015: 7 · 2014: 1
FWCI
13.58
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Ecology Resources (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft (GE 12 42/11-1)
Topics
  • Physical Sciences › Environmental Science › Ecology › Environmental DNA in Biodiversity Studies
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
  • Physical Sciences › Materials Science › Biomaterials › Diatoms and Algae Research
Keywords
diatoms, metabarcoding, morphological identification, species identification, water quality assessment, reference database, rare taxa, Oder River
MeSH terms
Algorithms, Cytological Techniques, Fresh Water, Microscopy, Molecular Sequence Data, Genetic Variation, Diatoms, Sequence Analysis, DNA, Biodiversity, Rivers, Workflow, DNA Barcoding, Taxonomic, Water Quality

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