Tolerance of high temperature and associated effects on reproduction in euedaphic Collembola

Xie, Liyan; Slotsbo, Stine; Holmstrup, Martin

doi:10.1016/j.jtherbio.2022.103439

Cited by 6 publications

(3 citation statements)

References 61 publications

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“…This temperature range spans + 10°C from the control conditions, which aims to simulate an extreme heat event as predicted in temperate regions for the next 100 years (CH2018 2018, IPCC 2021. Furthermore, the highest experimental temperature is considerably above the warmest soil temperatures experienced by the four species in their collection sites (Lembrechts et al 2022, Xie et al 2023, demonstrating the thermal extremity of our treatments. We established a total of 72 experimental units: 4 Collembola species × 3 temperature regimes × 6 replicates.…”

Section: Experiments 1 Life-history Responses To Warmingmentioning

confidence: 78%

“…In the case of P. tricampata and P. fimata , our results suggest that their thermal optimum for fecundity might lie between 20 and 25°C, which would explain the apparent lack of fecundity responses in these two species. It has been shown that acute thermal limits vary substantially across the four Collembola species, given the variation in their geographic range, and are related to the warmest soil temperatures found in their natural habitats (Xie et al 2023). Our results also confirm that variation in thermal performance of ectotherms could depend on their latitudinal origin (Sunday et al 2011, Sengupta et al 2017), as species collected from temperate regions ( P. armata , P. fimata , P. tricampata ) maintained a more constant performance across experimental temperatures than boreal species ( P. pseudovanderdrifti ).…”

Section: Discussionmentioning

confidence: 99%

“…The origin of the animals that initiated the cultures as well as their local climatic conditions are provided in Table 1 in Xie et al (2023). All species were reared for several generations (since the time of their collection in the field) in incubators at 20°C and fed with dry yeast before we used them for the experiments (Supporting information).…”

Section: Study Speciesmentioning

confidence: 99%

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Population resistance and recovery after an extreme heat event are explained by thermal effects on life‐history traits

Martínez‐De León,

Marty,

Holmstrup

et al. 2023

Oikos

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Extreme heat events lower the fitness of organisms by inducing physiological stress and increasing metabolic costs. Yet, little is known about the role of life‐history traits in elucidating population responses to extreme heat events. Here, we used a trait‐based approach to understand population resistance and recovery using four closely related species of soil‐dwelling Collembola. We measured thermal reaction norms of life‐history traits (survival and reproductive traits) and used this information to identify ecological mechanisms linked to population responses after an extreme heat event (i.e. one week at 26–30°C, representing + 10°C above ambient conditions). Furthermore, we investigated potential shifts in the body size distribution of recovering populations to better understand if extreme heat events can restructure body size spectra within populations. While resistance remained unaltered across species in our study, the recovery response of the most heat‐sensitive species (Protaphorura pseudovanderdrifti, predominantly a boreal species) was strongly affected by the extreme heat event (−54% population change compared to ambient conditions). Given that the fecundity (linked to recovery) of P. pseudovanderdrifti was more sensitive to heat than their survival (linked to resistance), we detected a decoupling between population resistance and recovery to an extreme heat event in this species. In addition, the detrimental effects of heat on fecundity were largely responsible for a drop in the proportion of small‐sized (juvenile) individuals in the recovering populations of P. pseudovanderdrifti. Thermally insensitive resistance and recovery in the other three species (P. armata, P. fimata, P. tricampata; predominantly temperate species) can be explained by their high survival and fecundity at warmer temperatures. We highlight that life‐history trait responses to warming can help explain population resistance and recovery after extreme heat events.

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Section: Experiments 1 Life-history Responses To Warmingmentioning

confidence: 78%