Georgia K. Kosmala, Luis M. Senzano, Mariana Routh, Nycolle A.O. Silva, Luis F. Montes, Denis V. Andrade
{"title":"脱水对南美白唇蛙(Leptodactylus fuscus)热生物学和运动性能的影响","authors":"Georgia K. Kosmala, Luis M. Senzano, Mariana Routh, Nycolle A.O. Silva, Luis F. Montes, Denis V. Andrade","doi":"10.1016/j.jtherbio.2025.104232","DOIUrl":null,"url":null,"abstract":"<div><div>Amphibians must constantly balance two vital physiological demands: maintaining adequate hydration and regulating body temperature. The behavioral adjustments required to support these needs often conflict, especially for terrestrial species, where performance-enhancing body temperatures typically increase the risk of dehydration. The complex interplay among these factors affects all aspects of amphibians’ biology and is thought to be highly sensitive to changes in climate and environment. Herein, we investigated how dehydration affects aspects of the thermal biology of the ground-dwelling frog <em>Leptodactylus fuscus,</em> a species tightly associated with terrestrial habitats. We investigated the frog's locomotor performance across different combinations of temperatures (10, 15, 20, 25, 30 and 35 °C) and hydration levels (100, 90 and 80 %), focusing on traits such as optimal temperature, maximal performance, and thermal performance breadth. We also investigated how dehydration affected their preferred body temperature, critical thermal maximum and minimum, and the thermal tolerance breadth. We found that dehydration reduced maximal performance capacity but did not affect optimal temperature or thermal performance breadth. Dehydrated frogs reduced their critical thermal maximum but not the critical thermal minimum, and as a result, narrowed their thermal tolerance breadth. Dehydration did not affect the frog's preferred body temperature, a response thought to be convenient to water conservation, since it reduces the potential for evaporative water loss. In general, the interplay between performance, temperature, and hydration state in <em>L. fuscus</em> seems to reflect the more terrestrial habit of this species and the climatic features of its habitat. The deleterious effects of combined hot and dehydrating conditions on the absolute levels of maximal performance may bear important consequences to the fitness and persistence of the species, and predicted scenarios of extreme heat and intense drought events bear more concern in the light of these findings.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"132 ","pages":"Article 104232"},"PeriodicalIF":2.9000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dehydration effects on the thermal biology and locomotor performance of the South American White-lipped Grassfrog, Leptodactylus fuscus\",\"authors\":\"Georgia K. Kosmala, Luis M. Senzano, Mariana Routh, Nycolle A.O. Silva, Luis F. Montes, Denis V. Andrade\",\"doi\":\"10.1016/j.jtherbio.2025.104232\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Amphibians must constantly balance two vital physiological demands: maintaining adequate hydration and regulating body temperature. The behavioral adjustments required to support these needs often conflict, especially for terrestrial species, where performance-enhancing body temperatures typically increase the risk of dehydration. The complex interplay among these factors affects all aspects of amphibians’ biology and is thought to be highly sensitive to changes in climate and environment. Herein, we investigated how dehydration affects aspects of the thermal biology of the ground-dwelling frog <em>Leptodactylus fuscus,</em> a species tightly associated with terrestrial habitats. We investigated the frog's locomotor performance across different combinations of temperatures (10, 15, 20, 25, 30 and 35 °C) and hydration levels (100, 90 and 80 %), focusing on traits such as optimal temperature, maximal performance, and thermal performance breadth. We also investigated how dehydration affected their preferred body temperature, critical thermal maximum and minimum, and the thermal tolerance breadth. We found that dehydration reduced maximal performance capacity but did not affect optimal temperature or thermal performance breadth. Dehydrated frogs reduced their critical thermal maximum but not the critical thermal minimum, and as a result, narrowed their thermal tolerance breadth. Dehydration did not affect the frog's preferred body temperature, a response thought to be convenient to water conservation, since it reduces the potential for evaporative water loss. In general, the interplay between performance, temperature, and hydration state in <em>L. fuscus</em> seems to reflect the more terrestrial habit of this species and the climatic features of its habitat. The deleterious effects of combined hot and dehydrating conditions on the absolute levels of maximal performance may bear important consequences to the fitness and persistence of the species, and predicted scenarios of extreme heat and intense drought events bear more concern in the light of these findings.</div></div>\",\"PeriodicalId\":17428,\"journal\":{\"name\":\"Journal of thermal biology\",\"volume\":\"132 \",\"pages\":\"Article 104232\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of thermal biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0306456525001895\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of thermal biology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306456525001895","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOLOGY","Score":null,"Total":0}
Dehydration effects on the thermal biology and locomotor performance of the South American White-lipped Grassfrog, Leptodactylus fuscus
Amphibians must constantly balance two vital physiological demands: maintaining adequate hydration and regulating body temperature. The behavioral adjustments required to support these needs often conflict, especially for terrestrial species, where performance-enhancing body temperatures typically increase the risk of dehydration. The complex interplay among these factors affects all aspects of amphibians’ biology and is thought to be highly sensitive to changes in climate and environment. Herein, we investigated how dehydration affects aspects of the thermal biology of the ground-dwelling frog Leptodactylus fuscus, a species tightly associated with terrestrial habitats. We investigated the frog's locomotor performance across different combinations of temperatures (10, 15, 20, 25, 30 and 35 °C) and hydration levels (100, 90 and 80 %), focusing on traits such as optimal temperature, maximal performance, and thermal performance breadth. We also investigated how dehydration affected their preferred body temperature, critical thermal maximum and minimum, and the thermal tolerance breadth. We found that dehydration reduced maximal performance capacity but did not affect optimal temperature or thermal performance breadth. Dehydrated frogs reduced their critical thermal maximum but not the critical thermal minimum, and as a result, narrowed their thermal tolerance breadth. Dehydration did not affect the frog's preferred body temperature, a response thought to be convenient to water conservation, since it reduces the potential for evaporative water loss. In general, the interplay between performance, temperature, and hydration state in L. fuscus seems to reflect the more terrestrial habit of this species and the climatic features of its habitat. The deleterious effects of combined hot and dehydrating conditions on the absolute levels of maximal performance may bear important consequences to the fitness and persistence of the species, and predicted scenarios of extreme heat and intense drought events bear more concern in the light of these findings.
期刊介绍:
The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are:
• The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature
• The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature
• Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause
• Effects of temperature on reproduction and development, growth, ageing and life-span
• Studies on modelling heat transfer between organisms and their environment
• The contributions of temperature to effects of climate change on animal species and man
• Studies of conservation biology and physiology related to temperature
• Behavioural and physiological regulation of body temperature including its pathophysiology and fever
• Medical applications of hypo- and hyperthermia
Article types:
• Original articles
• Review articles