Transgenerational selection driven by divergent ecological impacts of hybridizing lineages

Best, Rebecca J; Anaya-Rojas, Jaime Mauricio; Leal, Miguel C.; Schmid, Dominik W.; Seehausen, Ole; Matthews, Blake (2017). Transgenerational selection driven by divergent ecological impacts of hybridizing lineages. Nature ecology & evolution, 1(11), pp. 1757-1765. Nature Publishing Group 10.1038/s41559-017-0308-2

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Dynamic interactions between ecological conditions and the phenotypic composition of populations likely play an important role in evolution, but the direction and strength of these feedbacks remain difficult to characterize. We investigated these dynamics across two generations of threespine sticklebacks from two evolutionary lineages undergoing secondary contact and hybridization. Independently manipulating the density and lineage of adults in experimental mesocosms led to contrasting ecosystem conditions with strong effects on total survival in a subsequent generation of juveniles. Ecosystem modifications by adults also varied the strength of selection on competing hybrid and non-hybrid juveniles. This variation in selection indicated (1) a negative eco-evolutionary feedback driven by lineage-specific resource depletion and dependence and (2) a large perfor- mance advantage of hybrid juveniles in depleted environments. This work illustrates the importance of interactions between phenotype, population density and the environment in shaping selection and evolutionary trajectories, especially in the context of range expansion with secondary contact and hybridization.

Item Type:

Journal Article (Original Article)

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:

Anaya-Rojas, Jaime Mauricio and Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2397-334X

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

11 Oct 2017 17:05

Last Modified:

06 Nov 2017 10:36

Publisher DOI:

10.1038/s41559-017-0308-2

PubMed ID:

28963514

BORIS DOI:

10.7892/boris.105602

URI:

https://boris.unibe.ch/id/eprint/105602

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