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Same same, but different: The response of diatoms to environmental gradients in Fennoscandian streams and lakes-barcodes, traits and microscope data compared

Kahlert, Maria and Bailet, Bonnie and Chonova, Teofana and Karjalainen, Satu Maaria and Schneider, Susanne C. and Tapolczai, Kalman (2021). Same same, but different: The response of diatoms to environmental gradients in Fennoscandian streams and lakes-barcodes, traits and microscope data compared. Ecological Indicators. 130 , 108088
[Research article]

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Abstract

We developed and compared the performance of freshwater benthic diatom indices calculated from (i) traditional morphological species identification, (ii) Amplicon Sequence Variants (ASVs) obtained via DNA metabarcoding, and (iii) morphological traits to indicate eutrophication in rivers and lakes in Fennoscandia. Based on the results, we provided recommendations for the future routine use of diatom bioassessment tools in environmental monitoring and assessment. Our results show that ASVs are the most promising candidates to be used in environmental assessment. Indices based on ASVs correlated better with TotP concentrations than morphological taxa data, whereas the trait indices correlated least. We could see by studying the taxonomic assignments of the ASVs that traditional morphotaxa were divided up into several ASVs with different ecological profiles, which explained part of the better index performance and also encourages further studies on diatom diversity and ecological preferences. In general, ASV- and morphotaxon-specific optima differed slightly between streams and lakes, but were significantly correlated with each other. This means that it should be possible to develop a common index that is applicable in both streams and lakes, but boundary values with respect to TotP might need to be set separately for them. More knowledge on diatom traits is required to enable their use for environmental assessment.

Authors/Creators:Kahlert, Maria and Bailet, Bonnie and Chonova, Teofana and Karjalainen, Satu Maaria and Schneider, Susanne C. and Tapolczai, Kalman
Title:Same same, but different: The response of diatoms to environmental gradients in Fennoscandian streams and lakes-barcodes, traits and microscope data compared
Series Name/Journal:Ecological Indicators
Year of publishing :2021
Volume:130
Article number:108088
Number of Pages:12
Publisher:ELSEVIER
ISSN:1470-160X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Amplicon Sequence Variants, Environmental assessment, Index, Indicator value, Eutrophication, Metabarcoding
URN:NBN:urn:nbn:se:slu:epsilon-p-113681
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113681
Additional ID:
Type of IDID
DOI10.1016/j.ecolind.2021.108088
Web of Science (WoS)000692561900008
ID Code:25489
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:23 Sep 2021 10:25
Metadata Last Modified:23 Sep 2021 10:31

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