Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years
International audience Impact of climate change is expected to be especially noticeable at the edges of a species’ distribution, where they meet sub-optimal habitat conditions. In Mauritania and Iberia, two genetically differentiated populations of harbor porpoises (Phocoena phocoena) form an ecotyp...
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ftunimontpellier:oai:HAL:hal-03415287v2 2024-02-11T10:07:58+01:00 Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen, P A Ferreira, Marisa Eira, Catarina Pereira, Andreia, T Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. Groningen Institute for Evolutionary Life Sciences Groningen (GELIFES) University of Groningen Groningen University of Sheffield Sheffield Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC) Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Université de Montpellier (UM) 2023 https://hal.science/hal-03415287 https://hal.science/hal-03415287v2/document https://hal.science/hal-03415287v2/file/Ben_Chehida_MS_IBeria_V4_withoutTrackChange.pdf https://doi.org/10.1101/2021.08.19.456945 en eng HAL CCSD Wiley Open Access info:eu-repo/semantics/altIdentifier/doi/10.1101/2021.08.19.456945 hal-03415287 https://hal.science/hal-03415287 https://hal.science/hal-03415287v2/document https://hal.science/hal-03415287v2/file/Ben_Chehida_MS_IBeria_V4_withoutTrackChange.pdf BIORXIV: 2021.08.19.456945 doi:10.1101/2021.08.19.456945 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess EISSN: 2045-7758 Ecology and Evolution https://hal.science/hal-03415287 Ecology and Evolution, In press, ⟨10.1101/2021.08.19.456945⟩ cetacean conservation genetics genetic time series genetic diversity bycatch approximate Bayesian computation population genetic modelling [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2023 ftunimontpellier https://doi.org/10.1101/2021.08.19.456945 2024-01-23T23:34:59Z International audience Impact of climate change is expected to be especially noticeable at the edges of a species’ distribution, where they meet sub-optimal habitat conditions. In Mauritania and Iberia, two genetically differentiated populations of harbor porpoises (Phocoena phocoena) form an ecotype adapted to local upwelling conditions and distinct from other ecotypes further north on the NE Atlantic continental shelf and in the Black Sea. By analyzing the evolution of mitochondrial genetic variation in the Iberian population between two temporal cohorts (1990-2002 vs. 2012-2015), we report a substantial decrease in genetic diversity. Phylogenetic analyses including neighboring populations identified two porpoises in southern Iberia carrying a divergent haplotype closely related to those from the Mauritanian population, yet forming a distinct lineage. This suggests that Iberian porpoises may not be as isolated as previously thought, indicating possible dispersion from Mauritania or an unknown population in between, but none from the northern ecotype. Demo-genetic scenario testing by approximate Bayesian computation showed that the rapid decline in the Iberian mitochondrial diversity was not simply due to the genetic drift of a small population, but models support instead a substantial decline in effective population size, possibly resulting from environmental stochasticity, prey depletion, or acute fishery bycatches. These results illustrate the value of genetics time series to inform demographic trends and emphasize the urgent need for conservation measures to ensure the viability of this small harbor porpoise population in Iberian waters. Article in Journal/Newspaper Phocoena phocoena Université de Montpellier: HAL |
institution |
Open Polar |
collection |
Université de Montpellier: HAL |
op_collection_id |
ftunimontpellier |
language |
English |
topic |
cetacean conservation genetics genetic time series genetic diversity bycatch approximate Bayesian computation population genetic modelling [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
cetacean conservation genetics genetic time series genetic diversity bycatch approximate Bayesian computation population genetic modelling [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen, P A Ferreira, Marisa Eira, Catarina Pereira, Andreia, T Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
topic_facet |
cetacean conservation genetics genetic time series genetic diversity bycatch approximate Bayesian computation population genetic modelling [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Impact of climate change is expected to be especially noticeable at the edges of a species’ distribution, where they meet sub-optimal habitat conditions. In Mauritania and Iberia, two genetically differentiated populations of harbor porpoises (Phocoena phocoena) form an ecotype adapted to local upwelling conditions and distinct from other ecotypes further north on the NE Atlantic continental shelf and in the Black Sea. By analyzing the evolution of mitochondrial genetic variation in the Iberian population between two temporal cohorts (1990-2002 vs. 2012-2015), we report a substantial decrease in genetic diversity. Phylogenetic analyses including neighboring populations identified two porpoises in southern Iberia carrying a divergent haplotype closely related to those from the Mauritanian population, yet forming a distinct lineage. This suggests that Iberian porpoises may not be as isolated as previously thought, indicating possible dispersion from Mauritania or an unknown population in between, but none from the northern ecotype. Demo-genetic scenario testing by approximate Bayesian computation showed that the rapid decline in the Iberian mitochondrial diversity was not simply due to the genetic drift of a small population, but models support instead a substantial decline in effective population size, possibly resulting from environmental stochasticity, prey depletion, or acute fishery bycatches. These results illustrate the value of genetics time series to inform demographic trends and emphasize the urgent need for conservation measures to ensure the viability of this small harbor porpoise population in Iberian waters. |
author2 |
Groningen Institute for Evolutionary Life Sciences Groningen (GELIFES) University of Groningen Groningen University of Sheffield Sheffield Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC) Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Université de Montpellier (UM) |
format |
Article in Journal/Newspaper |
author |
Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen, P A Ferreira, Marisa Eira, Catarina Pereira, Andreia, T Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. |
author_facet |
Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen, P A Ferreira, Marisa Eira, Catarina Pereira, Andreia, T Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. |
author_sort |
Ben Chehida, Yacine |
title |
Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_short |
Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_full |
Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_fullStr |
Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_full_unstemmed |
Harbor porpoise losing its edges: genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_sort |
harbor porpoise losing its edges: genetic time series suggests a rapid population decline in iberian waters over the last 30 years |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-03415287 https://hal.science/hal-03415287v2/document https://hal.science/hal-03415287v2/file/Ben_Chehida_MS_IBeria_V4_withoutTrackChange.pdf https://doi.org/10.1101/2021.08.19.456945 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
EISSN: 2045-7758 Ecology and Evolution https://hal.science/hal-03415287 Ecology and Evolution, In press, ⟨10.1101/2021.08.19.456945⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1101/2021.08.19.456945 hal-03415287 https://hal.science/hal-03415287 https://hal.science/hal-03415287v2/document https://hal.science/hal-03415287v2/file/Ben_Chehida_MS_IBeria_V4_withoutTrackChange.pdf BIORXIV: 2021.08.19.456945 doi:10.1101/2021.08.19.456945 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1101/2021.08.19.456945 |
_version_ |
1790606854416498688 |