Vertical eDNA distribution of cold‐water fishes in response to environmental variables in stratified lake

In summer, the survival zones of cold‐water species are predicted to narrow by both increasing water temperatures from the surface and by expanding hypoxic zones from the lake bottom. To examine how the abundance of cold‐water fishes changes along environmental gradients, we assessed the vertical en...

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Bibliographic Details
Published in:Ecology and evolution 2024-03, Vol.14 (3), p.e11091-n/a
Main Authors: Fukumori, Kayoko, Kondo, Natsuko I., Kohzu, Ayato, Tsuchiya, Kenji, Ito, Hiroshi, Kadoya, Taku
Format: Article
Language:English
Subjects:
Biodiversity Ecology
Chlorophyll
Climate change
Community Ecology
Ecosystems
eDNA
Environmental DNA
Environmental gradient
Fish
Fishing
Hypoxia
Lakes
metabarcoding
Salmon
Species
species detection
Stratification
Temperature tolerance
Tolerances
Trout
Vertical distribution
Water circulation
Water column
Water temperature
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Summary:In summer, the survival zones of cold‐water species are predicted to narrow by both increasing water temperatures from the surface and by expanding hypoxic zones from the lake bottom. To examine how the abundance of cold‐water fishes changes along environmental gradients, we assessed the vertical environmental DNA (eDNA) distributions of three salmonid species which may have different water temperature tolerances during both stratification and turnover periods using quantitative PCR (qPCR). In addition, we examined on the vertical distribution of diverse fish fauna using an eDNA metabarcoding assay. The results suggested that the kokanee salmon (Oncorhynchus nerka) eDNA were abundant in deep, cold waters. On the other hand, rainbow trout (O. mykiss) eDNA were distributed uniformly throughout the water column, suggesting that they may have high water‐temperature tolerance compared with kokanee salmon. The eDNA concentrations of masu salmon (O. masou) were below the detection limit (i.e.,
ISSN:2045-7758
2045-7758
DOI:10.1002/ece3.11091