期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 216, 期 20, 页码 3828-3836出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jeb.092353
关键词
behavior; temperature; reptile; climate change; adaptation
类别
资金
- South African National Research Foundation (Key International Science Capacity Fund Program)
- Partenariat Hubert Curien-National Research Foundation Protea
- GDRI (Groupements de Recherche Internationaux) Biodiversity and global change in South Africa
Temperature is an extrinsic factor that influences reptile behavior because of its impact on reptile physiology. Understanding the impact of temperature on performance traits is important as it may affect the ecology and fitness of ectothermic animals such as reptiles. Here, we examined the temperature dependence of performance in two species of South African dwarf chameleon (Bradypodion): one adapted to a semi-arid environment and one to a mesic environment. Ecologically relevant performance traits were tested at different temperatures to evaluate their thermal dependence, and temperature-performance breadths for 80% and 90% of each performance trait were calculated. Our results show distinct differences in the thermal dependence of speed-versus force-related performance traits. Moreover, our results show that the semi-arid species is better adapted to higher temperatures and as such has a better chance of coping with the predicted increases in environmental temperature. The mesic area-adapted species seems to be more sensitive to an increase in temperature and could therefore potentially be threatened by the predicted future climate change. However, further studies investigating the potential for acclimation in chameleons are needed to better understand how animals may respond to future climate change.
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