Spatial Heterogeneity of eDNA Transport Improves Stream Assessment of Threatened Salmon Presence, Abundance, and Location

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dc.contributor.authorWood, Zachary T.
dc.contributor.authorLacoursière-Roussel, Anaïs
dc.contributor.authorLeBlanc, Francis
dc.contributor.authorTrudel, Marc
dc.contributor.authorKinnison, Michael T.
dc.contributor.authorMcBrine, Colton Garry
dc.contributor.authorPavey, Scott A.
dc.contributor.authorGagné, Nellie
dc.date.accessioned2023-05-23T17:37:50Z
dc.date.available2023-05-23T17:37:50Z
dc.date.issued2021-04-08
dc.description.abstractThe integration of environmental DNA (eDNA) within management strategies for lotic organisms requires translating eDNA detection and quantification data into inferences of the locations and abundances of target species. Understanding how eDNA is distributed in space and time within the complex environments of rivers and streams is a major factor in achieving this translation. Here we study bidimensional eDNA signals in streams to predict the position and abundance of Atlantic salmon (Salmo salar) juveniles. We use data from sentinel cages with a range of abundances (3–63 juveniles) that were deployed in three coastal streams in New Brunswick, Canada. We evaluate the spatial patterns of eDNA dispersal and determine the effect of discharge on the dilution rate of eDNA. Our results show that eDNA exhibits predictable plume dynamics downstream from sources, with eDNA being initially concentrated and transported in the midstream, but eventually accumulating in stream margins with time and distance. From these findings we developed a fish detection and distribution prediction model based on the eDNA ratio in midstream versus bankside sites for a variety of fish distribution scenarios. Finally, we advise that sampling midstream at every 400 m is sufficient to detect a single fish at low velocity, but sampling efforts need to be increased at higher water velocity (every 100 m in the systems surveyed in this study). Studying salmon eDNA spatio-temporal patterns in lotic environments is essential to developing strong quantitative population assessment models that successfully leverage eDNA as a tool to protect salmon populations.
dc.description.copyrightCopyright © 2021 Wood, Lacoursière-Roussel, LeBlanc, Trudel, Kinnison, Garry McBrine, Pavey and Gagné. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.identifier.issn2296-701X
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/22591
dc.language.isoen
dc.publisherFrontiers Media
dc.relation.hasversionhttps://doi.org/10.3389/fevo.2021.650717
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineBiology
dc.titleSpatial Heterogeneity of eDNA Transport Improves Stream Assessment of Threatened Salmon Presence, Abundance, and Location
dc.typejournal article
oaire.citation.endPage16
oaire.citation.startPage1
oaire.citation.titleFrontiers in Ecology and Evolution
oaire.citation.volume9
oaire.license.conditionhttp://creativecommons.org/licenses/by/4.0/
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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