Historical human activities reshape evolutionary trajectories across both native and introduced ranges
Abstract The same vectors that introduce species to new ranges could move them among native populations, but how human‐mediated dispersal impacts native ranges has been difficult to address because human‐mediated dispersal and natural dispersal can simultaneously shape patterns of gene flow. Here, w...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-07-01
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| Series: | Ecology and Evolution |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ece3.6391 |
| _version_ | 1818437340792619008 |
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| author | Anthony L. Einfeldt Linley K. Jesson Jason A. Addison |
| author_facet | Anthony L. Einfeldt Linley K. Jesson Jason A. Addison |
| author_sort | Anthony L. Einfeldt |
| collection | DOAJ |
| description | Abstract The same vectors that introduce species to new ranges could move them among native populations, but how human‐mediated dispersal impacts native ranges has been difficult to address because human‐mediated dispersal and natural dispersal can simultaneously shape patterns of gene flow. Here, we disentangle human‐mediated dispersal from natural dispersal by exploiting a system where the primary vector was once extensive but has since ceased. From 10th to 19th Centuries, ships in the North Atlantic exchanged sediments dredged from the intertidal for ballast, which ended when seawater ballast tanks were adopted. We investigate genetic patterns from RADseq‐derived SNPs in the amphipod Corophium volutator (n = 121; 4,870 SNPs) and the annelid Hediste diversicolor (n = 78; 3,820 SNPs), which were introduced from Europe to North America, have limited natural dispersal capabilities, are abundant in intertidal sediments, but not commonly found in modern water ballast tanks. We detect similar levels of genetic subdivision among introduced North American populations and among native European populations. Phylogenetic networks and clustering analyses reveal population structure between sites, a high degree of phylogenetic reticulation within ranges, and phylogenetic splits between European and North American populations. These patterns are inconsistent with phylogeographic structure expected to arise from natural dispersal alone, suggesting human activity eroded ancestral phylogeographic structure between native populations, but was insufficient to overcome divergent processes between naturalized populations and their sources. Our results suggest human activity may alter species' evolutionary trajectories on a broad geographic scale via regional homogenization and global diversification, in some cases precluding historical inference from genetic data. |
| first_indexed | 2024-12-14T17:23:07Z |
| format | Article |
| id | doaj.art-2d40cc18f84242f986f83684df3d65b2 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-12-14T17:23:07Z |
| publishDate | 2020-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-2d40cc18f84242f986f83684df3d65b22022-12-21T22:53:16ZengWileyEcology and Evolution2045-77582020-07-0110136579659210.1002/ece3.6391Historical human activities reshape evolutionary trajectories across both native and introduced rangesAnthony L. Einfeldt0Linley K. Jesson1Jason A. Addison2Department of Biology University of New Brunswick Fredericton NB CanadaDepartment of Biology University of New Brunswick Fredericton NB CanadaDepartment of Biology University of New Brunswick Fredericton NB CanadaAbstract The same vectors that introduce species to new ranges could move them among native populations, but how human‐mediated dispersal impacts native ranges has been difficult to address because human‐mediated dispersal and natural dispersal can simultaneously shape patterns of gene flow. Here, we disentangle human‐mediated dispersal from natural dispersal by exploiting a system where the primary vector was once extensive but has since ceased. From 10th to 19th Centuries, ships in the North Atlantic exchanged sediments dredged from the intertidal for ballast, which ended when seawater ballast tanks were adopted. We investigate genetic patterns from RADseq‐derived SNPs in the amphipod Corophium volutator (n = 121; 4,870 SNPs) and the annelid Hediste diversicolor (n = 78; 3,820 SNPs), which were introduced from Europe to North America, have limited natural dispersal capabilities, are abundant in intertidal sediments, but not commonly found in modern water ballast tanks. We detect similar levels of genetic subdivision among introduced North American populations and among native European populations. Phylogenetic networks and clustering analyses reveal population structure between sites, a high degree of phylogenetic reticulation within ranges, and phylogenetic splits between European and North American populations. These patterns are inconsistent with phylogeographic structure expected to arise from natural dispersal alone, suggesting human activity eroded ancestral phylogeographic structure between native populations, but was insufficient to overcome divergent processes between naturalized populations and their sources. Our results suggest human activity may alter species' evolutionary trajectories on a broad geographic scale via regional homogenization and global diversification, in some cases precluding historical inference from genetic data.https://doi.org/10.1002/ece3.6391anthropoceneevolutionhuman impactsintroduced species |
| spellingShingle | Anthony L. Einfeldt Linley K. Jesson Jason A. Addison Historical human activities reshape evolutionary trajectories across both native and introduced ranges Ecology and Evolution anthropocene evolution human impacts introduced species |
| title | Historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| title_full | Historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| title_fullStr | Historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| title_full_unstemmed | Historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| title_short | Historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| title_sort | historical human activities reshape evolutionary trajectories across both native and introduced ranges |
| topic | anthropocene evolution human impacts introduced species |
| url | https://doi.org/10.1002/ece3.6391 |
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