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Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding

Sofia Consuegra del Olmo Orcid Logo, Richard O'Rorke, Deiene Rodriguez Barreto, Sara Fernandez, Josh Jones Orcid Logo, Carlos Garcia De Leaniz Orcid Logo

Science of The Total Environment, Volume: 790, Start page: 148054

Swansea University Authors: Sofia Consuegra del Olmo Orcid Logo, Richard O'Rorke, Deiene Rodriguez Barreto, Josh Jones Orcid Logo, Carlos Garcia De Leaniz Orcid Logo

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DOI (Published version): 10.1016/j.scitotenv.2021.148054

Abstract

River fragmentation caused by instream barriers is a leading cause of biodiversity loss, particularly for freshwater migratory fish, the vertebrate group that has suffered the steepest decline. However, most studies have tended to focus on the impacts of large dams on only a few taxa. We estimated t...

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Published in: Science of The Total Environment
ISSN: 0048-9697
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57099
first_indexed 2021-06-11T09:27:28Z
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However, most studies have tended to focus on the impacts of large dams on only a few taxa. We estimated the cumulative impact of both large and small barriers on fish species richness and relative abundance along an altitudinal gradient in the main stem of the River Allier (France). Using eDNA metabarcoding, we identified 24 fish zero-radius operational taxonomic units (zOTUs), corresponding to 26 species distributed along the main stem of the river. Elevation explained the greatest amount of variation in fish distribution, together with average flow, barrier density and its interaction with cumulative barrier height. Based on eDNA, the largest discontinuity in species richness was not related to the location of Pout&#xE8;s, the largest dam in the system, but located downstream from it. Our results indicate that, in addition to the more obvious effects of large dams on migratory fish such as the Atlantic salmon, the cumulative effects of small barriers can have widespread impacts on fish species richness and relative abundance, which should not be overlooked. 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spelling 2022-10-27T08:38:45.8949580 v2 57099 2021-06-11 Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding 241f2810ab8f56be53ca8af23e384c6e 0000-0003-4403-2509 Sofia Consuegra del Olmo Sofia Consuegra del Olmo true false cbb43a40c53e5ba9681a9022dcf0c753 Richard O'Rorke Richard O'Rorke true false a19d5dff034b6dc4c330b3aa7674eb83 Deiene Rodriguez Barreto Deiene Rodriguez Barreto true false ba449bb58016ff34c4c18abadabb40c6 0000-0001-9047-9147 Josh Jones Josh Jones true false 1c70acd0fd64edb0856b7cf34393ab02 0000-0003-1650-2729 Carlos Garcia De Leaniz Carlos Garcia De Leaniz true false 2021-06-11 BGPS River fragmentation caused by instream barriers is a leading cause of biodiversity loss, particularly for freshwater migratory fish, the vertebrate group that has suffered the steepest decline. However, most studies have tended to focus on the impacts of large dams on only a few taxa. We estimated the cumulative impact of both large and small barriers on fish species richness and relative abundance along an altitudinal gradient in the main stem of the River Allier (France). Using eDNA metabarcoding, we identified 24 fish zero-radius operational taxonomic units (zOTUs), corresponding to 26 species distributed along the main stem of the river. Elevation explained the greatest amount of variation in fish distribution, together with average flow, barrier density and its interaction with cumulative barrier height. Based on eDNA, the largest discontinuity in species richness was not related to the location of Poutès, the largest dam in the system, but located downstream from it. Our results indicate that, in addition to the more obvious effects of large dams on migratory fish such as the Atlantic salmon, the cumulative effects of small barriers can have widespread impacts on fish species richness and relative abundance, which should not be overlooked. We suggest that, as for other fragmented rivers, acting on numerous small barriers might bring about greater benefits in fish species richness than focusing only on the largest dams. Journal Article Science of The Total Environment 790 148054 Elsevier BV 0048-9697 River connectivity; Habitat fragmentation; Dam; Rheophilic; eDNA 10 10 2021 2021-10-10 10.1016/j.scitotenv.2021.148054 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University This study was funded by the EC Horizon 2020 Research and Innovation Programme, AMBER (Adaptive Management of Barriers in European Rivers) Project, grant agreement number 689682, led by C.G.L. 2022-10-27T08:38:45.8949580 2021-06-11T10:21:49.5603285 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Sofia Consuegra del Olmo 0000-0003-4403-2509 1 Richard O'Rorke 2 Deiene Rodriguez Barreto 3 Sara Fernandez 4 Josh Jones 0000-0001-9047-9147 5 Carlos Garcia De Leaniz 0000-0003-1650-2729 6 57099__20132__66c81a69d0be40d5ae7e7da285d4125d.pdf 57099.pdf 2021-06-11T10:28:04.5600491 Output 1138529 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the CC BY-NC-ND license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
spellingShingle Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
Sofia Consuegra del Olmo
Richard O'Rorke
Deiene Rodriguez Barreto
Josh Jones
Carlos Garcia De Leaniz
title_short Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
title_full Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
title_fullStr Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
title_full_unstemmed Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
title_sort Impacts of large and small barriers on fish assemblage composition assessed using environmental DNA metabarcoding
author_id_str_mv 241f2810ab8f56be53ca8af23e384c6e
cbb43a40c53e5ba9681a9022dcf0c753
a19d5dff034b6dc4c330b3aa7674eb83
ba449bb58016ff34c4c18abadabb40c6
1c70acd0fd64edb0856b7cf34393ab02
author_id_fullname_str_mv 241f2810ab8f56be53ca8af23e384c6e_***_Sofia Consuegra del Olmo
cbb43a40c53e5ba9681a9022dcf0c753_***_Richard O'Rorke
a19d5dff034b6dc4c330b3aa7674eb83_***_Deiene Rodriguez Barreto
ba449bb58016ff34c4c18abadabb40c6_***_Josh Jones
1c70acd0fd64edb0856b7cf34393ab02_***_Carlos Garcia De Leaniz
author Sofia Consuegra del Olmo
Richard O'Rorke
Deiene Rodriguez Barreto
Josh Jones
Carlos Garcia De Leaniz
author2 Sofia Consuegra del Olmo
Richard O'Rorke
Deiene Rodriguez Barreto
Sara Fernandez
Josh Jones
Carlos Garcia De Leaniz
format Journal article
container_title Science of The Total Environment
container_volume 790
container_start_page 148054
publishDate 2021
institution Swansea University
issn 0048-9697
doi_str_mv 10.1016/j.scitotenv.2021.148054
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description River fragmentation caused by instream barriers is a leading cause of biodiversity loss, particularly for freshwater migratory fish, the vertebrate group that has suffered the steepest decline. However, most studies have tended to focus on the impacts of large dams on only a few taxa. We estimated the cumulative impact of both large and small barriers on fish species richness and relative abundance along an altitudinal gradient in the main stem of the River Allier (France). Using eDNA metabarcoding, we identified 24 fish zero-radius operational taxonomic units (zOTUs), corresponding to 26 species distributed along the main stem of the river. Elevation explained the greatest amount of variation in fish distribution, together with average flow, barrier density and its interaction with cumulative barrier height. Based on eDNA, the largest discontinuity in species richness was not related to the location of Poutès, the largest dam in the system, but located downstream from it. Our results indicate that, in addition to the more obvious effects of large dams on migratory fish such as the Atlantic salmon, the cumulative effects of small barriers can have widespread impacts on fish species richness and relative abundance, which should not be overlooked. We suggest that, as for other fragmented rivers, acting on numerous small barriers might bring about greater benefits in fish species richness than focusing only on the largest dams.
published_date 2021-10-10T07:58:38Z
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score 11.047544

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