Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years
Abstract Impact of climate change is expected to be especially noticeable at the edges of a species' distribution, where they meet suboptimal habitat conditions. In Mauritania and Iberia, two genetically differentiated populations of harbor porpoises ( Phocoena phocoena ) form an ecotype adapte...
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Online Access: | http://dx.doi.org/10.1002/ece3.10819 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.10819 |
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crwiley:10.1002/ece3.10819 2024-09-15T18:30:27+00:00 Harbor porpoise losing its edge: 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 Torres‐Pereira, Andreia Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. Rijksuniversiteit Groningen 2023 http://dx.doi.org/10.1002/ece3.10819 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.10819 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 13, issue 12 ISSN 2045-7758 2045-7758 journal-article 2023 crwiley https://doi.org/10.1002/ece3.10819 2024-09-05T05:05:38Z Abstract Impact of climate change is expected to be especially noticeable at the edges of a species' distribution, where they meet suboptimal 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 Wiley Online Library Ecology and Evolution 13 12 |
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English |
description |
Abstract Impact of climate change is expected to be especially noticeable at the edges of a species' distribution, where they meet suboptimal 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 |
Rijksuniversiteit Groningen |
format |
Article in Journal/Newspaper |
author |
Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen P. A. Ferreira, Marisa Eira, Catarina Torres‐Pereira, Andreia Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. |
spellingShingle |
Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen P. A. Ferreira, Marisa Eira, Catarina Torres‐Pereira, Andreia Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
author_facet |
Ben Chehida, Yacine Stelwagen, Tjibbe Hoekendijk, Jeroen P. A. Ferreira, Marisa Eira, Catarina Torres‐Pereira, Andreia Nicolau, Lidia Thumloup, Julie Fontaine, Michael C. |
author_sort |
Ben Chehida, Yacine |
title |
Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_short |
Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_full |
Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_fullStr |
Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_full_unstemmed |
Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years |
title_sort |
harbor porpoise losing its edge: genetic time series suggests a rapid population decline in iberian waters over the last 30 years |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/ece3.10819 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.10819 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Ecology and Evolution volume 13, issue 12 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.10819 |
container_title |
Ecology and Evolution |
container_volume |
13 |
container_issue |
12 |
_version_ |
1810471911776321536 |