Cited by 121Freshwater macroinvertebrate diversity and ecologyInvertebrate Taxonomy and EcologyEnvironmental Toxicology and Ecotoxicology

First audit of macroinvertebrate samples from an EU Water Framework Directive monitoring program: human error greatly lowers precision of assessment results

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Haase, Peter, Pauls, Steffen U., Schindehütte, Karin, Sundermann, Andrea·2010·Journal of the North American Benthological Society

Abstract

Invertebrates are often used in biological monitoring of soil and water ecosystems. Because of the huge number of invertebrate species, sample processing (sorting and identification) is a labor-intensive and often difficult task that is prone to error. These errors can bias assessment results, which often are used by environmental managers to guide funding decisions for costly restoration measures. However, quality control of assessment results is not implemented in many freshwater monitoring programs. We conducted the first audit of an official European freshwater monitoring program based on 414 macroinvertebrate samples from streams and rivers in Germany. The samples were collected by personnel at 7 different commercial environmental laboratories using the European Union (EU) Water Framework Directive protocol. We audited 12% of all samples at 3 different levels: 1) a sorting audit, 2) an identification audit, and 3) a total audit based on both sorting and identification. The sorting audit revealed that 29% of the specimens and every 5th taxon (20.6%) had been overlooked by the primary analyst. Differences in sorting were correlated with taxon body size (r = 0.61, p < 0.001). The identification audit showed that >30% of taxa differed between the results of the primary analysts and auditors. Taxa considered difficult to identify were not more prone to error than were taxa considered easier to identify. Primary analysts and auditors assigned 34% of audited samples to different quality classes in ≥1 of 3 assessment modules (organic pollution, acidification, and general degradation). For 16% of the samples, these changes resulted in a different final ecological assessment. Such a high rate of differences between primary analysts and auditors could lead to ineffective allocation of several million Euros. Our results clearly illustrate the need for adequate quality control and auditing in freshwater monitoring.

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  1. HOLZENTHAL, R. W., D. R. ROBERTSON, S. U. PAULS, AND P. K. MENDEZ. 2010. Taxonomy and systematics: contributions to benthology and future directions. Journal of the North American Benthological Society 29:147-169.
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  3. OSTERMILLER, J. D., AND C. P. HAWKINS. 2004. Effects of sampling error on bioassessments of stream ecosystems: application to RIVPACS-type models. Journal of the North American Benthological Society 23:363-382.
  4. USSEGLIO-POLATERA, P. 1991. Repre ´sentation graphique synthe ´tique de la signification e ´cologique d'un peuple- ment. Application aux macroinverte ´bre ´s du Rho ˆne a ` Lyon. Bulletin d'Ecologie 22:195-202.

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Authors
Haase, P., Pauls, S. U., Schindehütte, K., & Sundermann, A.
Affiliations
  • Senckenberg, Research Institute and Natural History Museum, Department of Limnology and Conservation, Clamecy Strasse 12, 63571 Gelnhausen, Germany
  • University of Minnesota (US)
Venue
Journal of the North American Benthological Society
Published
2010-12
Volume
29
Issue
4
Pages
1279-1291
ISSN
  • 0887-3593 (ISSN-L)
  • 1937-237X
OpenAlex
W2115439841
Cited by
119
References
40
Citations by year
2026: 8 · 2025: 9 · 2024: 10 · 2023: 4 · 2022: 6 · 2021: 11 · 2020: 9 · 2019: 15 · 2018: 10 · 2017: 10 · 2016: 10 · 2015: 7 · 2014: 2 · 2013: 3 · 2012: 2
FWCI
2.32
Type
journal article
Language
en
Open access
Locations
  • Journal of the North American Benthological Society (publishedVersion)
  • BioOne Complete (BioOne) (submittedVersion)
Topics
  • Physical Sciences › Environmental Science › Ecology › Freshwater macroinvertebrate diversity and ecology
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Invertebrate Taxonomy and Ecology
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
Keywords
macroinvertebrates, Water Framework Directive, freshwater monitoring, quality control, auditing, human error, taxonomic identification, ecological assessment

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