https://doi.org/10.4081/jlimnol.2023.2151

A procedure to update quality indices based on species abundances: an example using the EPI-L diatom index

Vol. 82 (2023)
Submitted: 26 July 2023
Accepted: 27 October 2023
Published: 20 November 2023
benthic diatoms, ecological quality index
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Supplementary Tab. S1: 58
Supplementary Tab. S2: 60
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Authors

Aldo Marchetto
aldo.marchetto@cnr.it
https://orcid.org/0000-0002-1033-4114
National Research Council, Water Research Institute (CNR-IRSA), Verbania-Pallanza, Italy.
Simona Musazzi
https://orcid.org/0000-0001-5549-0084
National Biodiversity Future Center (NBFC), Palermo, Italy.

We propose a procedure to update ecological quality indices using species autoecology estimated by gradient analysis when new species are found, or taxonomy is updated. When updating an index, the new values must be comparable to the old ones to avoid recalibration and quality class boundary changes. As gradient length influences the values of the species optima, we propose to avoid adding new species to existing lists and we suggest recalibrating the index with a new calibration dataset and rescaling species optima. This final step reduces index updating-induced quality classification changes. An example is shown using the EPI-L diatom index, a quality index for lakes affected by trophic pressure.

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Edited by

Michela Rogora, National Research Council, Water Research Institute (CNR-IRSA), Verbania Pallanza, Italy

Supporting Agencies

National Biodiversity Future Center, Palermo, Italy , Italian National Research Council, Italian Ministry of University and Research

How to Cite

Marchetto, Aldo, and Simona Musazzi. 2023. “A Procedure to Update Quality Indices Based on Species Abundances: An Example Using the EPI-L Diatom Index”. Journal of Limnology 82 (1). https://doi.org/10.4081/jlimnol.2023.2151.
Copyright (c) 2023 The Author(s) Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.


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