Responses of Manduca sexta larvae to heat waves
Responses of Manduca sexta larvae to heat waves
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DOI：
10.1242/jeb.236505
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发表时间：
2021-04-01
影响因子：
2.8
通讯作者：
Hill, Christina A.
中科院分区：
文献类型：
--
作者：
Kingsolver, Joel G.;Moore, M. Elizabeth;Hill, Christina A.
气候变化正在增加生物体经历热浪和其他极端天气事件的频率。热浪的数量和发育时间如何影响昆虫的生存、生长和发育？开发早期的热浪会改变开发后期的性能吗？我们解决了这些问题，使用实验热浪与幼虫的烟草天蛾，天蛾。这些实验使用了每日波动的温度处理，不同的是热浪的数量（0-3）和发育时间（幼虫发育的早期，中期和/或晚期），其中一个热浪涉及连续三天，每日最高温度为42摄氏度。随着热浪次数的增加，化蛹存活率下降。多个（但不是单一的）热浪显着减少发展时间和蛹质量的数据的最佳模型表明，热浪的数量和发展时间影响性能。此外，热浪早期发展显着降低增长和发展速度后来在幼虫的发展。我们的研究结果说明了亚致死热浪的频率和发育时间对昆虫的生活史特征有重要影响。
Climate change is increasing the frequency of heat waves and other extreme weather events experienced by organisms. How does the number and developmental timing of heat waves affect survival, growth and development of insects? Do heat waves early in development alter performance later in development? We addressed these questions using experimental heat waves with larvae of the tobacco hornworm, Manduca sexta. The experiments used diurnally fluctuating temperature treatments differing in the number (0-3) and developmental timing (early, middle and/or late in larval development) of heat waves, in which a single heat wave involved three consecutive days with a daily maximum temperature of 42 degrees C. Survival to pupation declined with increasing number of heat waves. Multiple (but not single) heat waves significantly reduced development time and pupal mass; the best models for the data indicated that both the number and developmental timing of heat waves affected performance. In addition, heat waves earlier in development significantly reduced growth and development rates later in larval development. Our results illustrate how the frequency and developmental timing of sublethal heat waves can have important consequences for life history traits in insects.