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Transgenerational selection driven by divergent ecological impacts of hybridizing lineages.
Journal article

Transgenerational selection driven by divergent ecological impacts of hybridizing lineages.

  • Best RJ Department of Aquatic Ecology & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland. rebecca.best@nau.edu.
  • Anaya-Rojas JM Department of Aquatic Ecology & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland.
  • Leal MC Department of Fish Ecology and Evolution & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland.
  • Schmid DW Department of Aquatic Ecology & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland.
  • Seehausen O Department of Fish Ecology and Evolution & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland.
  • Matthews B Department of Aquatic Ecology & Center for Ecology, Evolution and Biogeochemistry, Eawag, 6047, Kastanienbaum, Switzerland.
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  • 2017-10-01
Published in:
  • Nature ecology & evolution. - 2017
Animals
Biological Evolution
Hybridization, Genetic
Lakes
Phenotype
Selection, Genetic
Smegmamorpha
Switzerland
English 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 performance 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.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/112104
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