Curr Opin Insect Sci 2023 Jun 01;57:101029. doi: 10.1016/j.cois.2023.101029.

Epigenetic effects of climate change on insects.

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Climate change has been causing severe modifications to the environment that are predicted to aggravate in the future, which create critical challenges for insects to cope. Populations can respond to the changes depending on the standing genetic variation. Additionally, they could potentially rely on epigenetic mechanisms as a source of phenotypic variation. These mechanisms can influence gene regulation and can respond to the external environment, being implicated in phenotypic plasticity. Thus, epigenetic variation could be advantageous in changing, unpredictable environments. However, little is known about causal relationships between epigenetic marks and insects' phenotypes, and whether the effects are truly beneficial to the fitness. Empirical studies are now urgent to better understand whether epigenetic variation can help or hinder insect populations facing climate change.

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