Evidence map›Paper›PMID 29435253›Full record

ArticleEcology and evolution2018

Proper experimental design requires randomization/balancing of molecular ecology experiments.

Miklós Bálint, Orsolya Márton, Marlene Schatz, Rolf-Alexander Düring, Hans-Peter Grossart

Abstract read
In one paragraph

Article in Ecology and evolution, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Miklós BálintSenckenberg Biodiversity and Climate Research Centre Frankfurt am Main Germany.ORCID 0000-0003-0499-8536
Orsolya MártonSenckenberg Biodiversity and Climate Research Centre Frankfurt am Main Germany.
Marlene SchatzInstitut für Bodenkunde und Bodenerhaltung Gießen Germany.
Rolf-Alexander DüringInstitut für Bodenkunde und Bodenerhaltung Gießen Germany.
Hans-Peter GrossartLeibniz Institute for Freshwater Ecology and Inland Fisheries Stechlin Germany.ORCID 0000-0002-9141-0325

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Properly designed (randomized and/or balanced) experiments are standard in ecological research. Molecular methods are increasingly used in ecology, but studies generally do not report the detailed design of sample processing in the laboratory. This may strongly influence the interpretability of results if the laboratory procedures do not account for the confounding effects of unexpected laboratory events. We demonstrate this with a simple experiment where unexpected differences in laboratory processing of samples would have biased results if randomization in DNA extraction and PCR steps do not provide safeguards. We emphasize the need for proper experimental design and reporting of the laboratory phase of molecular ecology research to ensure the reliability and interpretability of results.

Indexed as

batch effectbiasDNA extractionenvironmental DNAlaboratory practicelake communitymetabarcodingnondemonic intrusionsPCRsediment

Identifiers

PMID29435253
PMCPMC5792580

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.