Developing in drying ponds could leave frogs unprepared for climate change DOI Open Access
Kathryn Knight

Journal of Experimental Biology, Год журнала: 2023, Номер 226(9)

Опубликована: Май 1, 2023

Dependable wet seasons are essential for the survival of many frogs, which rely on full pools in spring their aquatic young to develop and mature. But recently, some regions have suffered unusually dry winters, threatening vital watercourses, conditions predicted become even drier. ‘Development is a particularly sensitive period animals’, says Michel Ohmer, at University Mississippi, USA, explaining that growing as tadpole dwindling warm pool could affect animal later life. no one knew how. As southern leopard frog (Rana sphenocephala) tadpoles grow up change, Jeff Bednark Trina Wantman (while Pittsburgh, USA) headed down Fort Polk, Louisiana, collect eggs freshly laid by frogs find out how animals fared adults after or start.Recreating 18 ponds plastic team covered each with cloth providing 50% shade shelter before introducing 40 new homes warming simulate future climate conditions. Then, recreated drought lowering water rapidly six tanks over 9 weeks until almost dry, while draining more slowly from other keeping level unchanged remaining ponds. By doing so, created range droughts current climate. did different pond environments developing youngsters?The measured tadpoles’ growth development, it was clear loss tank caused faster, warmer drove them emerging fully formed froglets about 10 weeks. And when compared size they finally lost tails, youngsters drying were always smaller than deeper pools. changing impact life?After transporting Ohmer spooked 1- 2-month-old amphibians into jumping temperatures gently prodding them, found had developed cool, deep outleapt warmer, drier ponds, bounding 12% further 32°C. The also checked well withstand heat, discovering fastest unable cope high temperatures, regardless age 7 months, warmest most timid less keen explore preferring hang conditions.‘The environment can both short- long-term, leading changes not only handle but choose habitat’, Ohmer. So, be detrimental adult continues warming. warns impacts change ‘may amplified beyond what has been predicted’, may avoid picking microbes offer protection pathogens. However, she points frogs’ preference make vulnerable fungal infections thrive cold.

Язык: Английский

Longer days, larger grays: carryover effects of photoperiod and temperature in gray treefrogs, Hyla versicolor DOI
Troy C. Neptune, Michael F. Benard

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 291(2026)

Опубликована: Июль 1, 2024

Environmental conditions like temperature and photoperiod can strongly shape organisms' growth development. For many ectotherms with complex life cycles, global change will cause their offspring to experience warmer earlier-season photoperiods, two variables that induce conflicting responses. We experimentally manipulated during gray treefrog (

Язык: Английский

Процитировано

1
The Circadian Rhythm of the Behavior and Gut Microbiota in Dybowski’s Frogs (Rana dybowskii) during the Autumn Migration Period DOI Creative Commons
Nan Hu, Yingdong Li,

M. Wang

и другие.

Life, Год журнала: 2024, Номер 14(3), С. 322 - 322

Опубликована: Фев. 28, 2024

Many amphibian behaviors and physiological functions adapt to daily environmental changes through variations in circadian rhythms. However, these adaptations have yet be reported Dybowski’s frog (Rana dybowskii). We aimed elucidate the dynamic behavior gut microbiota of R. dybowskii within a 24 h cycle during their migration hibernation sites. Thus, we monitored at 4 intervals collected samples for microbiome analysis. found that juvenile frogs arrived sites earlier than adults. Among adults, male earlier. The richness diversity adult were lowest 14:00. At 6:00, differences between males females most significant. 18:00, there was an increase activity Bacteroides, Coprobacillus, Ruminococcus, Dorea intestinal tracts frogs, whereas tract female Pseudoramibacter_Eubacterium, Desulfovibrio, Anaerotruncus, PW3. This indicated diurnal rhythmic significant sex-based microbial different time points. Our findings contribute understanding rhythm provide crucial insights into improving breeding strategies.

Язык: Английский

Процитировано

0
Vertical and diel niches modulate thermal selection by rainforest frogs DOI Creative Commons
David H. Klinges,

Tsitohaina Randriambololona,

Zachary K. Lange

и другие.

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 291(2034)

Опубликована: Ноя. 1, 2024

Thermoregulatory behaviour determines an organism’s body temperature and therefore its physiological condition, may differ for organisms situated across climate gradients. Species’ preferred or selected temperatures be higher in warmer locations—referred to as coadaptation—or lower temperatures—countergradient variation. Here, we tested if rainforest amphibians exhibited coadaptation countergradient thermal selection underappreciated spatial gradient (vertical height from forest floor canopy) separating diel activity (diurnal versus nocturnal behaviour). We captured 2534 over 216 ground-to-canopy surveys, conducted 282 assays 37 species while pairing microclimate measurements mechanistic model predictions understand vertical daily variation the field. Amphibians selection: occupying cool conditions canopies than hot diurnal at floor. Furthermore, average that they were exposed when active, this divergence was especially high arboreal (8.68°C). This suggests dramatically underfill warm end of their niches, a trend local gradients reflects recent findings elevational latitudinal show considering multidimensional is important evaluate thermoregulatory behaviour, evolutionary underpinnings, understanding species’ niches community assembly.

Язык: Английский

Процитировано

0
Drivers of Intraspecific Variation in Thermal Traits and Their Importance for Resilience to Global Change in Amphibians DOI
Jennifer M. Cocciardi, Michel E. B. Ohmer

Integrative and Comparative Biology, Год журнала: 2024, Номер 64(3), С. 882 - 899

Опубликована: Авг. 13, 2024

Synopsis Intraspecific variation can be as great across species, but the role of intraspecific in driving local and large-scale patterns is often overlooked, particularly field thermal biology. In amphibians, which depend on environmental conditions behavior to regulate body temperature, recognizing trait essential comprehensively understanding how global change impacts populations. Here, we examine drivers micro- macrogeographical amphibians. At scale, arise via changes ontogeny, size, between sexes, developmental plasticity, acclimation, maternal effects may modulate predictions amphibian performance under future climate scenarios. macrogeographic adaptation traits occur along latitudinal elevational gradients, with seasonality range-edge dynamics likely playing important roles that impact persistence. We also discuss importance considering disease a factor affecting population resilience change, given pathogens preferences critical limits hosts. Finally, make recommendations for work this area. Ultimately, our goal demonstrate why it researchers consider determine amphibians change.

Язык: Английский

Процитировано

0
Developing in drying ponds could leave frogs unprepared for climate change DOI Open Access
Kathryn Knight

Journal of Experimental Biology, Год журнала: 2023, Номер 226(9)

Опубликована: Май 1, 2023

Dependable wet seasons are essential for the survival of many frogs, which rely on full pools in spring their aquatic young to develop and mature. But recently, some regions have suffered unusually dry winters, threatening vital watercourses, conditions predicted become even drier. ‘Development is a particularly sensitive period animals’, says Michel Ohmer, at University Mississippi, USA, explaining that growing as tadpole dwindling warm pool could affect animal later life. no one knew how. As southern leopard frog (Rana sphenocephala) tadpoles grow up change, Jeff Bednark Trina Wantman (while Pittsburgh, USA) headed down Fort Polk, Louisiana, collect eggs freshly laid by frogs find out how animals fared adults after or start.Recreating 18 ponds plastic team covered each with cloth providing 50% shade shelter before introducing 40 new homes warming simulate future climate conditions. Then, recreated drought lowering water rapidly six tanks over 9 weeks until almost dry, while draining more slowly from other keeping level unchanged remaining ponds. By doing so, created range droughts current climate. did different pond environments developing youngsters?The measured tadpoles’ growth development, it was clear loss tank caused faster, warmer drove them emerging fully formed froglets about 10 weeks. And when compared size they finally lost tails, youngsters drying were always smaller than deeper pools. changing impact life?After transporting Ohmer spooked 1- 2-month-old amphibians into jumping temperatures gently prodding them, found had developed cool, deep outleapt warmer, drier ponds, bounding 12% further 32°C. The also checked well withstand heat, discovering fastest unable cope high temperatures, regardless age 7 months, warmest most timid less keen explore preferring hang conditions.‘The environment can both short- long-term, leading changes not only handle but choose habitat’, Ohmer. So, be detrimental adult continues warming. warns impacts change ‘may amplified beyond what has been predicted’, may avoid picking microbes offer protection pathogens. However, she points frogs’ preference make vulnerable fungal infections thrive cold.

Язык: Английский

Процитировано

0