Hudson, Cameron Marshall; Cuenca Cambronero, Maria; Moosmann, Marvin; Narwani, Anita; Spaak, Piet; Seehausen, Ole; Matthews, Blake (2023). Environmentally independent selection for hybrids between divergent freshwater stickleback lineages in semi-natural ponds. Journal of evolutionary biology, 36(8), pp. 1166-1184. Wiley 10.1111/jeb.14194
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Hybridization following secondary contact of genetically divergent populations can influence the range expansion of invasive species, though specific outcomes depend on the environmental dependence of hybrid fitness. Here, using two genetically and ecologically divergent threespine stickleback lineages that differ in their history of freshwater colonization, we estimate fitness variation of parental lineages and hybrids in semi-natural freshwater ponds with contrasting histories of nutrient loading. In our experiment, we found that fish from the older freshwater lineage (Lake Geneva) and hybrids outperformed fish from the younger freshwater lineage (Lake Constance) in terms of both growth and survival, regardless of the environmental context of our ponds. Across all ponds, hybrids exhibited the highest survival. Although wild-caught adult populations differed in their functional and defence morphology, it is unclear which of these traits underlie the fitness differences observed among juveniles in our experiment. Overall, our work suggests that when hybrid fitness is insensitive to environmental conditions, as observed here, introgression may promote population expansion into unoccupied habitats and accelerate invasion success.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) 08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology |
UniBE Contributor: |
Moosmann, Marvin Alexander, Seehausen, Ole |
Subjects: |
500 Science > 570 Life sciences; biology |
ISSN: |
1420-9101 |
Publisher: |
Wiley |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
04 Jul 2023 09:43 |
Last Modified: |
10 Aug 2023 00:17 |
Publisher DOI: |
10.1111/jeb.14194 |
PubMed ID: |
37394735 |
Uncontrolled Keywords: |
adaptation hybridization invasive species threespine stickleback |
BORIS DOI: |
10.48350/184337 |
URI: |
https://boris.unibe.ch/id/eprint/184337 |
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