Temperature and development drive variation in oral morphology among tailed frog (<i>Ascaphus</i>spp.) populations

Cicchino, Amanda S.; Martinez, Christina; Funk, W. Chris; Forester, Brenna R.

doi:10.1101/2020.04.06.027664

Cited by 2 publications

(3 citation statements)

References 84 publications

(135 reference statements)

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“…Tailed frogs are already declining as a result of warming stream temperatures and environmental disturbances (Hossack et al, 2023). This result, along with previous studies demonstrating that these species are sensitive to habitat disturbance (Hossack & Honeycutt, 2017;Wahbe & Bunnell, 2001, 2003 and have low acclimation capacities (Cicchino et al, 2023), suggests that their capacity to cope with future environmental change is limited. Whether the significant population variation in thermal tolerance that we uncovered in these species provides the potential for evolutionary responses to future changes in climate remains to be determined.…”

Section: Fixed Effectsmentioning

confidence: 85%

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Multi‐scale relationships in thermal limits within and between two cold‐water frog species uncover different trends in physiological vulnerability

et al. 2023

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1. Critical thermal limits represent an important component of an organism's capacity to cope with future temperature changes. Understanding the drivers of variation in these traits may uncover patterns in physiological vulnerability to climate change. Local temperature extremes have emerged as a major driver of thermal limits, although their effects can be mediated by the exploitation of fine‐scale spatial variation in temperature through behavioural thermoregulation. 2. Here, we investigated thermal limits along elevation gradients within and between two cold‐water frog species (Ascaphus spp.), one with a coastal distribution (A. truei) and the other with a continental range (A. montanus). We quantified thermal limits for over 700 tadpoles, representing multiple populations from each species. We combined local temporal and fine‐scale spatial temperature data to quantify local thermal landscapes (i.e., thermalscapes), including the opportunity for behavioural thermoregulation. 3. Lower thermal limits for either species could not be reached experimentally without the water freezing, suggesting that cold tolerance is <0.3°C. By contrast, upper thermal limits varied among populations, but this variation only reflected local temperature extremes in A. montanus, perhaps as a consequence of the greater variation in stream temperatures across its range. Lastly, we found minimal fine‐scale spatial variability in temperature, suggesting limited opportunity for behavioural thermoregulation and thus increased vulnerability to warming for all populations. 4. By quantifying local thermalscapes, we uncovered different trends in the relative vulnerability of populations across elevation for each species. In A. truei, physiological vulnerability decreased with elevation, whereas in A. montanus, all populations were equally physiologically vulnerable. These results highlight how similar environments can differentially shape physiological tolerance and patterns of vulnerability of species, and in turn impact their vulnerability to future warming.

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Section: Fixed Effectsmentioning

confidence: 85%

“…data are freely available from Dryad: https://doi.org/10.5061/ dryad.qrfj6q5mh(Cicchino, 2023) https://orcid.org/0000-0003-0170-829XR E FE R E N C E SAdams, S. B., & Frisell, C. A. (2001).…”

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confidence: 99%

Multi‐scale relationships in thermal limits within and between two cold‐water frog species uncover different trends in physiological vulnerability

et al. 2023

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“…An increasing body of evidence indicates that microgeographic adaptation occurs among numerous species and ecosystems (Richardson et al, 2014), influencing distribution, abundance, and individual phenotype (Cicchino et al, 2021). For example, limpets (genus Patella ) separated by <2 m experienced significantly different sun exposure and thermal stress depending on the side of the rock that they inhabit (Seabra et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Demography and space‐use of Eastern Red‐backed Salamanders (Plethodon cinereus) between mature and successional forests

Gade

Gould

Wilk

et al. 2023

Ecology and Evolution

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Space-use and demographic processes are critical to the persistence of populations across space and time. Despite their importance, estimates of these processes are often derived from a limited number of populations spanning broad habitat or environmental gradients. With increasing appreciation of the role fine-scale environmental variation in microgeographic adaptation, there is a need and value to assessing within-site variation in space-use and demographic patterns. In this study, we analyze 3 years of spatial capture-recapture data on the Eastern Red-backed Salamander collected from a mixed-use deciduous forest site in central Ohio, USA. Study plots were situated in both a mature forest stand and successional forest stand separated by <100-m distance. Our results showed that salamander density was reduced on successional plots, which corresponded with greater distance between nearest neighbors, less overlap in core use areas, greater space-use, and greater shifts in activity centers when compared to salamanders occupying the mature habitat. By contrast, individual growth rates of salamanders occupying the successional forest were significantly greater than salamanders in the mature forest. These estimates result in successional plot salamanders reaching maturity more than 1 year earlier than salamanders on the mature forest plots and increasing their estimated lifetime fecundity by as much as 43%. The patterns we observed in space-use and individual growth are likely the result of density-dependent processes, potentially reflecting differences in resource availability or quality. Our study highlights how fine-scale, within-site variation can shape population demographics. As research into the demographic and population consequences of climate change and habitat loss and alteration continue, future research should take care to acknowledge the role that fine-scale variation may play, especially for abiotically sensitive organisms with limited vagility.

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Temperature and development drive variation in oral morphology among tailed frog (Ascaphusspp.) populations

Cited by 2 publications

References 84 publications

Multi‐scale relationships in thermal limits within and between two cold‐water frog species uncover different trends in physiological vulnerability

Multi‐scale relationships in thermal limits within and between two cold‐water frog species uncover different trends in physiological vulnerability

Demography and space‐use of Eastern Red‐backed Salamanders (Plethodon cinereus) between mature and successional forests

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