Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental
Arctic biodiversity has long been underestimated and is now facing rapid transformations due to ongoing climate change and other impacts including shipping activities. These changes are placing marine coastal invertebrate communities at greater risk, especially in sensitive areas such as commercial...
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2019
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fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/36279 2023-05-15T14:29:31+02:00 Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental Assessment of marine invertebrate biodiversity in Arctic commercial ports through environmental DNA Leduc, Noémie Archambault, Philippe Bernatchez, Louis Arctique, Côte de l' (Canada) 2019-01-01 https://hdl.handle.net/20.500.11794/36279 fr fre Université Laval http://hdl.handle.net/20.500.11794/36279 other CorpusUL envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2019 fttriple https://doi.org/20.500.11794/36279 2023-01-22T17:40:45Z Arctic biodiversity has long been underestimated and is now facing rapid transformations due to ongoing climate change and other impacts including shipping activities. These changes are placing marine coastal invertebrate communities at greater risk, especially in sensitive areas such as commercial ports. Preserving biodiversity is a significant challenge, going far beyond the protection of charismatic species and involving suitable knowledge of the organization of species in space. Therefore, knowledge of alpha, beta and gamma biodiversity indices are of great importance in achieving this objective together with new cost-effective approaches to monitor changes in biodiversity. This study compares metabarcoding of COI mitochondrial genes and 18S rRNA genes from environmental DNA (eDNA) water samples with standard species collection methods to document patterns of invertebrate communities at various spatial scales. Water samples (250 mL) were collected at three different depths within three Canadian Arctic ports; Churchill, MB, Iqaluit, NU and Deception Bay, QC. From these samples, 202 genera distributed across more than 15 phyla were detected using eDNA metabarcoding, of which only 9% to 15% were also identified through species collection at the same sites. Significant differences in taxonomic richness and community composition were observed between eDNA and species collections, both on local and regional scales. This study shows that eDNA dispersion in the Arctic Ocean reduces beta diversity in comparison to species collection while emphasizing the importance of pelagic life stages for eDNA detection. This study highlights the potential of eDNA metabarcoding to assess large-scale arctic marine invertebrate diversity while emphasizing that eDNA and species collection should be considered as complementary tools for providing a more holistic picture of the marine invertebrate communities living in coastal areas. D’abord méconnue puis longuement sous-estimée, la biodiversité de l’Arctique fait maintenant face à ... Thesis Arctic biodiversity Arctic Arctic Ocean Arctique* Climate change Iqaluit Unknown Arctic Arctic Ocean Canada |
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Open Polar |
collection |
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op_collection_id |
fttriple |
language |
French |
topic |
envir geo |
spellingShingle |
envir geo Leduc, Noémie Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
topic_facet |
envir geo |
description |
Arctic biodiversity has long been underestimated and is now facing rapid transformations due to ongoing climate change and other impacts including shipping activities. These changes are placing marine coastal invertebrate communities at greater risk, especially in sensitive areas such as commercial ports. Preserving biodiversity is a significant challenge, going far beyond the protection of charismatic species and involving suitable knowledge of the organization of species in space. Therefore, knowledge of alpha, beta and gamma biodiversity indices are of great importance in achieving this objective together with new cost-effective approaches to monitor changes in biodiversity. This study compares metabarcoding of COI mitochondrial genes and 18S rRNA genes from environmental DNA (eDNA) water samples with standard species collection methods to document patterns of invertebrate communities at various spatial scales. Water samples (250 mL) were collected at three different depths within three Canadian Arctic ports; Churchill, MB, Iqaluit, NU and Deception Bay, QC. From these samples, 202 genera distributed across more than 15 phyla were detected using eDNA metabarcoding, of which only 9% to 15% were also identified through species collection at the same sites. Significant differences in taxonomic richness and community composition were observed between eDNA and species collections, both on local and regional scales. This study shows that eDNA dispersion in the Arctic Ocean reduces beta diversity in comparison to species collection while emphasizing the importance of pelagic life stages for eDNA detection. This study highlights the potential of eDNA metabarcoding to assess large-scale arctic marine invertebrate diversity while emphasizing that eDNA and species collection should be considered as complementary tools for providing a more holistic picture of the marine invertebrate communities living in coastal areas. D’abord méconnue puis longuement sous-estimée, la biodiversité de l’Arctique fait maintenant face à ... |
author2 |
Archambault, Philippe Bernatchez, Louis |
format |
Thesis |
author |
Leduc, Noémie |
author_facet |
Leduc, Noémie |
author_sort |
Leduc, Noémie |
title |
Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
title_short |
Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
title_full |
Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
title_fullStr |
Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
title_full_unstemmed |
Évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'Arctique grâce à l'ADN environnemental |
title_sort |
évaluation de la biodiversité des invertébrés marins dans les ports commerciaux de l'arctique grâce à l'adn environnemental |
publisher |
Université Laval |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11794/36279 |
op_coverage |
Arctique, Côte de l' (Canada) |
geographic |
Arctic Arctic Ocean Canada |
geographic_facet |
Arctic Arctic Ocean Canada |
genre |
Arctic biodiversity Arctic Arctic Ocean Arctique* Climate change Iqaluit |
genre_facet |
Arctic biodiversity Arctic Arctic Ocean Arctique* Climate change Iqaluit |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/36279 |
op_rights |
other |
op_doi |
https://doi.org/20.500.11794/36279 |
_version_ |
1766303506352832512 |