Adaptation to fluctuations in temperature by nine species of bacteria

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Saarinen , K , Laakso , J , Lindström , L & Ketola , T 2018 , ' Adaptation to fluctuations in temperature by nine species of bacteria ' , Ecology and Evolution , vol. 8 , no. 5 , pp. 2901-2910 . https://doi.org/10.1002/ece3.3823

Title: Adaptation to fluctuations in temperature by nine species of bacteria
Author: Saarinen, Kati; Laakso, Jouni; Lindström, Leena; Ketola, Tarmo
Other contributor: University of Helsinki, University of Jyväskylä
University of Helsinki, Biosciences
Date: 2018-03
Language: eng
Number of pages: 10
Belongs to series: Ecology and Evolution
ISSN: 2045-7758
DOI: https://doi.org/10.1002/ece3.3823
URI: http://hdl.handle.net/10138/237849
Abstract: Rapid environmental fluctuations are ubiquitous in the wild, yet majority of experimental studies mostly consider effects of slow fluctuations on organism. To test the evolutionary consequences of fast fluctuations, we conducted nine independent experimental evolution experiments with bacteria. Experimental conditions were same for all species, and we allowed them to evolve either in fluctuating temperature alternating rapidly between 20°C and 40°C or at constant 30°C temperature. After experimental evolution, we tested the performance of the clones in both rapid fluctuation and in constant environments (20°C, 30°C and 40°C). Results from experiments on these nine species were combined meta-analytically. We found that overall the clones evolved in the fluctuating environment had evolved better efficiency in tolerating fluctuations (i.e., they had higher yield in fluctuating conditions) than the clones evolved in the constant environment. However, we did not find any evidence that fluctuation-adapted clones would have evolved better tolerance to any measured constant environments (20°C, 30°C, and 40°C). Our results back up recent empirical findings reporting that it is hard to predict adaptations to fast fluctuations using tolerance curves.
Subject: 1181 Ecology, evolutionary biology
EXPERIMENTAL EVOLUTION
REACTION NORM
TEMPERATURE FLUCTUATION
TOLERANCE CURVE
TEMPORALLY VARYING ENVIRONMENT
ESCHERICHIA-COLI
SENSITIVITY
CLIMATE-CHANGE
POPULATIONS
GENERALISTS
DROSOPHILA
THERMAL PERFORMANCE CURVES
SPECIALISTS
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