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Insect thermal baggage

Strong positive selection on cold hardiness and relaxed selection on heat hardiness experienced by range-expanding populations may help to explain why ectothermic animals generally have broader thermal tolerance towards the poles, and shed new light on their climate vulnerabilities.

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Figure 1: A comparison of the thermal tolerances of range-expanding and stable populations.


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The author thanks Mary Power for helpful comments.

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Correspondence to Caroline Williams.

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Williams, C. Insect thermal baggage. Nature Clim Change 6, 543–544 (2016).

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