Heatwaves During Early Development Have Long-Term Consequences for Parental Care in Adulthood

Sidhu, Karendeep; Zafeiri, Stamatia; Malcolm, Charlotte; Caplaet, Paul; Lancaster, Lesley T.; Pilakouta, Natalie

doi:10.2139/ssrn.4240423

Cited by 1 publication

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“…Previous work has typically examined the effect of heatwaves by exposing individuals to increased temperature during one particular life stage (e.g. Chevrier et al, 2019; Sidhu et al, 2022; Vasudeva et al, 2021), and a few studies have compared the effects of heatwaves during distinct life stages, for example, in juveniles versus adults (e.g. Porcelli et al, 2017; Sales et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The consequences of heatwaves for animal reproduction are timing‐dependent

Pilakouta,

Sellers,

Barratt

et al. 2023

Functional Ecology

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In light of the increased frequency of heatwaves due to climate change, it is crucial to better understand their potential effects on animal reproduction. Heat stress can affect all aspects of reproduction, including gamete development, fertilisation success, parental care and offspring survival. We may, therefore, expect these effects to be highly sensitive to the timing of a heatwave event relative to an organism's reproductive cycle. Here, we use an insect study system (Nicrophorus vespilloides) to test whether variation in the timing of a heatwave within a short timeframe has differential effects on reproductive success and offspring fitness. We found that heatwaves had little to no effect when they occurred a few days before or after mating, but they were highly detrimental for fitness if they occurred during mating. Individuals that experienced a heatwave during mating were significantly less likely to have a successful breeding bout, had a longer breeding bout, and their offspring were smaller and suffered a lower survival rate. Our study shows that variation in the timing of a heatwave event over very short timescales (on the order of days) can have drastically different consequences for animal reproduction. This work provides novel insights into the vulnerability of organisms at different stages of their reproductive cycle and can improve our ability to make informed predictions about the ecological consequences of heatwaves under climate change. Read the free Plain Language Summary for this article on the Journal blog.

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