Rapid evolution of thermal tolerance in the water flea Daphnia.



Geerts, AN, Vanoverbeke, J, Vanschoenwinkel, B, Van Doorslaer, W, Feuchtmayr, H, Atkinson, David ORCID: 0000-0002-9956-2454, Moss, Brian, Davidson, TA, Sayer, CD and De Meester, L
(2015) Rapid evolution of thermal tolerance in the water flea Daphnia. Nature Climate Change, 5 (7). pp. 665-668.

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Abstract

Global climate is changing rapidly, and the degree to which natural populations respond genetically to these changes is key to predicting ecological responses (1-3). So far, no study has documented evolutionary changes in thermal tolerance of natural populations as a response to recent temperature increase. Here, we demonstrate genetic change in the capacity of the water flea Daphnia to tolerate higher temperatures using both a selection experiment and the reconstruction of evolution over a period of forty years derived from a layered dormant egg bank. We observed a genetic increase in thermal tolerance in response to a two-year ambient +4 deg C selection treatment and in the genotypes of natural populations from the 1960s and 2000s hatched from lake sediments. This demonstrates that natural populations have evolved increased tolerance to higher temperatures, probably associated with the increased frequency of heat waves over the past decades, and possess the capacity to evolve increased tolerance to future warming.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 27 May 2015 08:00
Last Modified: 15 Dec 2022 12:06
DOI: 10.1038/NCLIMATE2628
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/2012033