Experimental Evidence of an Eco-evolutionary Feedback during Adaptive Divergence

Matthews, Blake; Aebischer, Thierry; Sullam, Karen E.; Lundsgaard-Hansen, Bänz; Seehausen, Ole (2016). Experimental Evidence of an Eco-evolutionary Feedback during Adaptive Divergence. Current Biology, 26(4), pp. 483-489. Cell Press 10.1016/j.cub.2015.11.070

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Differences in how organisms modify their environment can evolve rapidly and might influence adaptive population divergence [1, 2]. In a common garden experiment in aquatic mesocosms, we found that adult stickleback from a recently diverged pair of lake and stream populations had contrasting effects on ecosystem metrics. These modifications were caused by both genetic and plastic differences between populations and were sometimes comparable in magnitude to those caused by the presence/ absence of stickleback. Lake and streamfish differentially affected the biomass of zooplankton and phytoplankton, the concentration of phosphorus, and the abundance of several prey (e.g., copepods) and non-prey (e.g., cyanobacteria) species. The adult mediated effects on mesocosm ecosystems influenced the survival and growth of a subsequent generation of juvenile stickleback reared in the same mesocosms. The prior presence of adults decreased the overall growth rate of juveniles, and the prior presence of stream adults lowered overall juvenile survival. Among the survivors, lake juveniles grew faster than co-occurring stream juveniles, except in mesocosm ecosystems previously modified by adult lake fish that were reared on plankton. Overall, our results provide evidence for reciprocal interactions between ecosystem dynamics and evolutionary change (i.e., eco-evolutionary feedbacks) in the early stages of adaptive population divergence.

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:

Aebischer, Thierry and Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0960-9822

Publisher:

Cell Press

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

11 Feb 2016 15:59

Last Modified:

17 Sep 2017 08:39

Publisher DOI:

10.1016/j.cub.2015.11.070

BORIS DOI:

10.7892/boris.75489

URI:

https://boris.unibe.ch/id/eprint/75489

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