Local differences of thermal preferences in European common frog (Rana temporaria Linnaeus, 1758) tadpoles

Drakulić, Sanja; Feldhaar, Heike; Lisičić, Duje; Mioč, Mia; Cizelj, Ivan; Seiler, Michael; Spatz, Theresa; Rödel, Mark‐Oliver

doi:10.1016/j.jcz.2017.04.005

Cited by 10 publications

(10 citation statements)

References 41 publications

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“…Independent from TH status, body condition was highest and SMR was relatively low in larvae reared at 14, 18, and 22 °C, and SMR was also relatively low at these temperatures, and therefore, our results underscore that the optimum temperature during development is between 18 and 22 °C. This is in accordance with the previous studies (Rühmekopf 1958;Drakulić et al, 2017). Any increase in temperatures above this optimum increases SMR and may lead to a small but constant increase in energetic demands.…”

Section: Altered Th Levels and Higher Temperatures Affect Smr And Bodsupporting

confidence: 93%

“…In natural breeding ponds of R. temporaria, temperatures during development are within this optimum temperature range and may outstrip this range under short-term temperature fluctuations (i.e., diurnal change) and in late developmental stages due to a seasonal mean temperature increase. However, Drakulić et al (2017) demonstrated that mean seasonal temperature in Germany and southern Europe was 20 °C and lower suggesting that larvae of R. temporaria may experience mean temperatures within their thermal optimum for maintaining a stable SMR under natural conditions. Climate change is altering patterns of environmental temperature with potentially important repercussions for ectotherms that must simultaneously cope with contaminants or other environmental stressors (Hallman and Brooks 2015).…”

Section: Altered Th Levels and Higher Temperatures Affect Smr And Bodmentioning

confidence: 99%

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Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

et al. 2020

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Environmental stress induced by natural and anthropogenic processes including climate change may threaten the productivity of species and persistence of populations. Ectotherms can potentially cope with stressful conditions such as extremes in temperature by exhibiting physiological plasticity. Amphibian larvae experiencing stressful environments display altered thyroid hormone (TH) status with potential implications for physiological traits and acclimation capacity. We investigated how developmental temperature (T dev) and altered TH levels (simulating proximate effects of environmental stress) influence the standard metabolic rate (SMR), body condition (BC), and thermal tolerance in metamorphic and post-metamorphic anuran larvae of the common frog (Rana temporaria) reared at five constant temperatures (14-28 °C). At metamorphosis, larvae that developed at higher temperatures had higher maximum thermal limits but narrower ranges in thermal tolerance. Mean CT max was 37.63 °C ± 0.14 (low TH), 36.49 °C ± 0.31 (control), and 36.43 °C ± 0.68 (high TH) in larvae acclimated to different temperatures. Larvae were able to acclimate to higher T dev by adjusting their thermal tolerance, but not their SMR, and this effect was not impaired by altered TH levels. BC was reduced by 80% (metamorphic) and by 85% (postmetamorphic) at highest T dev. The effect of stressful larval conditions (i.e., different developmental temperatures and, to some extent, altered TH levels) on SMR and particularly on BC at the onset of metamorphosis was carried over to froglets at the end of metamorphic climax. This has far reaching consequences, since body condition at metamorphosis is known to determine metamorphic success and, thus, is indirectly linked to individual fitness in later life stages.

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Section: Altered Th Levels and Higher Temperatures Affect Smr And Bodsupporting

confidence: 93%

Section: Altered Th Levels and Higher Temperatures Affect Smr And Bodmentioning

confidence: 99%

Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

et al. 2020

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“…Similarly, Drakulic et al [104] observed that morphometrics, physiological condition and activity of metamorphs of Rana temporaria populations originating from warmer habitats show adaptation to warmer temperatures than metamorphs originating from cooler habitats. Adaptation to the local environment and its fluctuations is particularly important for tadpoles of anuran because of their limited capability for thermoregulation and movement towards favourable habitats [105]. However, data on local adaptations and tolerance limits of P. cruciger and/or similar local species are lacking.…”

Section: Growth Development and Survival: Effects Of Elevated Tempermentioning

confidence: 99%

“…This is supported by the observation of Ruthsatz et al [83] that tadpoles developed at warmer temperatures show higher maximum thermal limits. Drakulic et al [105] also provide evidence that anuran amphibians have the capacity to adapt to warmer temperatures after they have experienced a higher temperature for some period.…”

Section: Growth Development and Survival: Effects Of Elevated Tempermentioning

confidence: 99%

“…sub-humid tropical) zones of Sri Lanka, across an altitude ranging up to 1525 m above sea level, in a wide and patchy distribution pattern. Physiological and behavioral responses of anurans to environmental stressors such as thermal stress are highly population-specific [104,105,123]. That is because populations located in different habitats are likely to have developed variable local adaptations resulting in a discrepancy in the ways that they respond to environmental stressors.…”

Section: Future Directionsmentioning

confidence: 99%

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The impact of elevated temperature and CO2 on growth, physiological and immune responses of Polypedates cruciger (common hourglass tree frog)

Weerathunga

Rajapaksa

2020

Front Zool

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Background: Amphibians are one of the most susceptible groups to climate change as their development occurs in aquatic environments or in microhabitats with high humidity. Accordingly, our primary objective was to investigate the chronic physiological responses seen in early larval to adult stages of Polypedates cruciger (Common hourglass tree frog) to future climate change based on continuous exposure to elevated temperature and elevated CO 2 -induced low water pH. Free-swimming and free-feeding tadpoles were observed until metamorphosis under four experimental treatments; two elevated temperatures, one elevated CO 2 (reduced pH) and a control maintained at ambient temperature (29°C ± 1°C) and CO 2 (pH = 7). Elevated temperature treatments were maintained at 32°C ± 0.5°C and 34°C ± 0.5°C to represent respectively, the future climate scenarios RCP2.6 (Representative Concentration Pathway 2.6, the 'base-case' scenario) and RCP8.5 ('business-as-usual' scenario) according to the 5 th Assessment Report of the IPCC. Elevated CO 2 treatment was maintained within the pH range of 5.5-5.6 representing the range expected between RCP8.5 and RCP2.6. Results: Compared to the control, elevated CO 2 accelerated phenological progression of tadpoles through Gosner stages, thus resulting in lower body size at metamorphosis. Both elevated temperatures significantly delayed the development and reduced the growth of tadpoles. 100% mortality was observed in 34°C treatment before metamorphosis (before Gosner stage 36) while all the tadpoles died after metamorphosis (at Gosner stage 46) in 32°C treatment. Elevated CO 2 increased tadpole activity, in terms of their swimming speed, while both of the elevated temperatures reduced it compared to the control. Catalase activity increased at elevated CO 2 . Ammonia excretion by tadpoles was decreased by elevated CO 2 , but increased under temperature elevation. Both Elevated CO 2 and temperature treatments reduced the white blood cell count and its percentage of thrombocytes. Percentages of lymphocytes, monocytes and neutrophils were increased at 32°C, while lymphocyte percentage and lysozyme activity were increased at elevated CO 2 . Several deformities were observed in tadpoles at elevated temperature and CO 2 .

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Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

et al. 2022

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Phenotypic plasticity may allow ectotherms with complex life histories such as amphibians to cope with climate‐driven changes in their environment. Plasticity in thermal tolerance (i.e., shifts of thermal limits via acclimation to higher temperatures) has been proposed as a mechanism to cope with warming and extreme thermal events. However, thermal tolerance and, hence, acclimation capacity, is known to vary with life stage. Using the common frog (Rana temporaria) as a model species, we measured the capacity to adjust lower (CTmin) and upper (CTmax) critical thermal limits at different acclimation temperatures. We calculated the acclimation response ratio as a metric to assess the stage‐specific acclimation capacity at each of seven consecutive ontogenetic stages and tested whether acclimation capacity was influenced by body mass and/or age. We further examined how acclimation temperature, body mass, age, and ontogenetic stage influenced CTmin and CTmax. In the temperate population of R. temporaria that we studied, thermal tolerance and acclimation capacity were affected by the ontogenetic stage. However, acclimation capacity at both thermal limits was well below 100% at all life stages tested. The lowest and highest acclimation capacity in thermal limits was observed in young and late larvae, respectively. The relatively low acclimation capacity of young larvae highlights a clear risk of amphibian populations to ongoing climate change. Ignoring stage‐specific differences in thermal physiology may drastically underestimate the climate vulnerability of species, which will hamper successful conservation actions.

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Local differences of thermal preferences in European common frog (Rana temporaria Linnaeus, 1758) tadpoles

Cited by 10 publications

References 41 publications

Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

The impact of elevated temperature and CO2 on growth, physiological and immune responses of Polypedates cruciger (common hourglass tree frog)

Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

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