Journal
JOURNAL OF EVOLUTIONARY BIOLOGY
Volume 34, Issue 7, Pages 1177-1184Publisher
WILEY
DOI: 10.1111/jeb.13797
Keywords
adaptation; climate change; evolutionary rescue; experimental evolution; temperature
Categories
Funding
- Academy of Finland [278751, 321584]
- Academy of Finland (AKA) [321584, 278751, 321584, 278751] Funding Source: Academy of Finland (AKA)
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As climate change accelerates and habitats free from anthropogenic impacts diminish, populations are forced to migrate or to adapt quickly. Research shows that slower environmental change can improve population growth efficiency even in extreme conditions, but at the cost of long-term survival under extreme conditions.
As climate change accelerates and habitats free from anthropogenic impacts diminish, populations are forced to migrate or to adapt quickly. Evolutionary rescue (ER) is a phenomenon, in which a population is able to avoid extinction through adaptation. ER is considered to be more likely at slower rates of environmental change. However, the effects of correlated characters on evolutionary rescue are seldom explored yet correlated characters could play a major role in ER. We tested how evolutionary background in different fluctuating environments and the rate of environmental change affect the probability of ER by exposing populations of the bacteria Serratia marcescens to two different rates of steady temperature increase. As suggested by theory, slower environmental change allowed populations to grow more effectively even at extreme temperatures, but at the expense of long-term survival at extreme conditions due to correlated selection. Our results indicate important gap of knowledge on the effects of correlated selection during the environmental change and on evolutionary rescue at differently changing environments.
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