Data from: Fluctuating temperature leads to evolution of thermal generalism and preadaptation to novel environments

Tarmo Ketola, Lauri Mikonranta, Ji Zhang, Kati Saarinen, Ville-Petri Friman, Anni-Maria Örmälä, Johanna Mappes & Jouni Laakso
Environmental fluctuations can select for generalism, which is also hypothesized to increase organisms’ ability to invade novel environments. Here, we show that across a range of temperatures, opportunistic bacterial pathogen Serratia marcescens that evolved in fluctuating temperature (daily variation between 24°C and 38°C, mean 31°C) outperforms the strains that evolved in constant temperature (31°C). The growth advantage was also evident in novel environments in the presence of parasitic viruses and predatory protozoans, but less clear...
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