eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers

12 pages, 4 figures, 1 table

Detalles Bibliográficos
Autores: Overland, Benjamin, Parks, Millicent V., García de Leaniz, Carlos, Consuegra, Sofía
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/423545
Acceso en línea:http://hdl.handle.net/10261/423545
Access Level:acceso abierto
Palabra clave:Barrier mitigation
eDNA
Salmonid
River fragmentation
Biological monitoring
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spelling eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriersOverland, BenjaminParks, Millicent V.García de Leaniz, CarlosConsuegra, SofíaBarrier mitigationeDNASalmonidRiver fragmentationBiological monitoring12 pages, 4 figures, 1 tableThe fragmentation of river systems by artificial barriers is contributing to the global decline of migratory fish species. In response, many barriers are now being considered for removal or mitigation to restore connectivity, but the effectiveness of such interventions is unclear due to a lack of monitoring before and after mitigation. We used two complementary monitoring methods based on environmental DNA (eDNA) analysis, detection (determined by number of positive qPCRs) and abundance (based on the analysis of copy numbers), to assess the response of two migratory fish (the European eel, Anguilla anguilla, and the Atlantic salmon Salmo salar) as well as the (predominantly) potadromous brown trout (Salmo trutta) to the partial or full removal of twelve barriers in five Welsh rivers. We observed species-specific responses, and differences based on the assessment method (detection or abundance) and mitigation type (easement or removal). Trout detection and abundance increased following barrier mitigation, while salmon and eel detection declined, with salmon abundance remaining the same. Analysis using the number of copies offered higher resolution than relying on qPCR positives alone, indicating that eDNA monitoring which relies solely on detection may obscure subtle changes in populations following barrier mitigation. Our abundance estimates comparing the removal and easement of small weirs indicate that full barrier removal leads to an increase in trout abundance one year after mitigation when compared to easement, but even small mitigation interventions of in-stream barriers influence both migratory and resident fish populations, which may benefit from increasing habitat availability and connectivityThis project was funded by the Welsh Government & Nature Networks Fund (REF NL-21-00087) to CGL. S.C. was funded by the Programme ATRAE (REF ATR2023–144170; MICIU/AEI/10.13039/501100011033) and by a Royal Society Industry Fellowship (IF\R1\231030). CGL was funded by the Programme ATRAE (REF ATR2023–143937; MICIU/AEI/10.13039/501100011033)Peer reviewedElsevierWelsh GovernmentMinisterio de Ciencia, Innovación y Universidades (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262026info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/423545reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésThe underlying dataset has been published as supplementary material of the article in the publishers platform at DOI https://doi.org/10.1016/j.ecolind.2026.114694https://doi.org/10.1016/j.ecolind.2026.114694Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4235452026-05-22T06:33:51Z
dc.title.none.fl_str_mv eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
title eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
spellingShingle eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
Overland, Benjamin
Barrier mitigation
eDNA
Salmonid
River fragmentation
Biological monitoring
title_short eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
title_full eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
title_fullStr eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
title_full_unstemmed eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
title_sort eDNA-based monitoring metrics for migratory and resident fish following full and partial removal of river barriers
dc.creator.none.fl_str_mv Overland, Benjamin
Parks, Millicent V.
García de Leaniz, Carlos
Consuegra, Sofía
author Overland, Benjamin
author_facet Overland, Benjamin
Parks, Millicent V.
García de Leaniz, Carlos
Consuegra, Sofía
author_role author
author2 Parks, Millicent V.
García de Leaniz, Carlos
Consuegra, Sofía
author2_role author
author
author
dc.contributor.none.fl_str_mv Welsh Government
Ministerio de Ciencia, Innovación y Universidades (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Barrier mitigation
eDNA
Salmonid
River fragmentation
Biological monitoring
topic Barrier mitigation
eDNA
Salmonid
River fragmentation
Biological monitoring
description 12 pages, 4 figures, 1 table
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/423545
url http://hdl.handle.net/10261/423545
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv The underlying dataset has been published as supplementary material of the article in the publishers platform at DOI https://doi.org/10.1016/j.ecolind.2026.114694
https://doi.org/10.1016/j.ecolind.2026.114694
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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