Arid
DOI10.1016/j.jtherbio.2016.07.019
Thermal tolerance in the Andean toad Rhinella spinulosa (Anura: Bufonidae) at three sites located along a latitudinal gradient in Chile
Alveal Riquelme, Nicza1; Diaz-Paez, Helen1; Carlos Ortiz, Juan2
通讯作者Alveal Riquelme, Nicza
来源期刊JOURNAL OF THERMAL BIOLOGY
ISSN0306-4565
出版年2016
卷号60页码:237-245
英文摘要

Rhinella spinulosa is one of the anuran species with the greatest presence in Chile. This species mainly inhabits mountain habitats and is distributed latitudinally along the western slope of the Andes Range. These habitats undergo great temperature fluctuations, exerting pressure on the amphibian. To identify the physiological strategies and thermal behavior of this species, we analyzed the temperature variables CTmin, CTmax, TTR, tau(heat), and tau(cool) in individuals of three sites from a latitudinal gradient (22 degrees S to 37 degrees S). The amphibians were acclimated to 10 degrees C and 20 degrees C and fed ad libitum. The results indicate that the species has a high thermal tolerance range, with a mean of 38.14 +/- 1.34 degrees C, a critical thermal maxima of 34.6-41.4 degrees C, and a critical thermal minima of 2.6-0.8 degrees C, classifying the species as eurythermic. Furthermore, there were significant differences in CTmax and TTR only in the northern site. The differences in thermal time constants between sites are due to the effects of size and body mass. For example, those from the central site had larger size and greater thermal inertia; therefore, they warmed and cooled in a slower manner.


The wide thermal limits determined in R. spinulosa confirm that it is a thermo-generalist species, a characteristic that allows the species to survive in adverse microclimatic conditions. The level of plasticity in critical temperatures seems ecologically relevant and supports the acclimatization of thermal limits as an important factor for ectothermic animals to adapt to climate change. (C) 2016 Elsevier Ltd. All rights reserved.


英文关键词Andean toad Thermal biology Latitudinal effect
类型Article
语种英语
国家Chile
收录类别SCI-E
WOS记录号WOS:000382349700029
WOS关键词BODY-TEMPERATURE ; BUFO-SPINULOSUS ; HEATING RATES ; MONTE DESERT ; THERMOREGULATION ; ACCLIMATION ; VULNERABILITY ; PHYSIOLOGY ; EVOLUTION ; CAPACITY
WOS类目Biology ; Zoology
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/194848
作者单位1.Univ Concepcion, Dept Ciencias Basicas, Campus Los Angeles,Casilla 341, Los Angeles, Chile;
2.Univ Concepcion, Dept Zool, Campus Concepcion,Casilla 160-C, Concepcion, Chile
推荐引用方式
GB/T 7714
Alveal Riquelme, Nicza,Diaz-Paez, Helen,Carlos Ortiz, Juan. Thermal tolerance in the Andean toad Rhinella spinulosa (Anura: Bufonidae) at three sites located along a latitudinal gradient in Chile[J],2016,60:237-245.
APA Alveal Riquelme, Nicza,Diaz-Paez, Helen,&Carlos Ortiz, Juan.(2016).Thermal tolerance in the Andean toad Rhinella spinulosa (Anura: Bufonidae) at three sites located along a latitudinal gradient in Chile.JOURNAL OF THERMAL BIOLOGY,60,237-245.
MLA Alveal Riquelme, Nicza,et al."Thermal tolerance in the Andean toad Rhinella spinulosa (Anura: Bufonidae) at three sites located along a latitudinal gradient in Chile".JOURNAL OF THERMAL BIOLOGY 60(2016):237-245.
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