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Evolutionary rescue

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Evolutionary rescue is a process by which a population—that would have gone extinct in the absence of evolution—persists due to natural selection acting on heritable variation. Coined by Gomulkiewicz & Holt in 1995, evolutionary rescue was described as a continuously changing environment predicted to appear as a stable lag of the mean trait value behind a moving environmental optimum, where the rate of evolution and change in the environment are equal. Evolutionary rescue is often confused with two other commonplace forms of rescue: genetic rescue and demographic rescue-in nature due to overlapping similarities. Figure 1 highlights the different pathways that result in their respective rescue.