Heat stress reduced survival but sped up development in Heliconius erato butterflies
Heat stress reduced survival but sped up development in Heliconius erato butterflies
复制标题
DOI：
10.1111/phen.12431
复制
发表时间：
2024-02-20
影响因子：
1.5
通讯作者：
Montejo-Kovacevich，Gabriela
中科院分区：
文献类型：
--
作者：
Huang，Yuqian;Mcpherson，Josie;Montejo-Kovacevich，Gabriela
人为气候变化被认为是对生物多样性的重大威胁，特别是对热带外温动物，长期发育热应激对这一群体的影响受到的研究关注相对较少。在这里，我们研究了实验性提高发育温度对热带蝴蝶的影响。本文测定了三种温度处理下的斑蝶Heliconius erato demophoon（Linnaeus）的存活率、发育时间、成虫体质量和翅长。在较热的处理中，卵的存活率较低，在20-30°C（温度波动，20°C下12小时，然后30 ° C下12小时）、23-33°C和26-36°C处理中分别有84%、73%和49%的卵孵化。幼虫存活率在26-36°C处理（8%）中比20-30°C处理（26%）低三倍，并且由于早期阶段的高死亡率，我们没有检测到处理之间蛹存活率的差异。在23-33°C的适度升高的温度下，幼虫发育更快，成虫具有更高的体重和翼负荷，但在最热的处理（26-36°C）中没有看到这一点。在23-33°C的处理中，雌性也比雄性重，但翅膀大小没有相关的增加。这可能表明两性对适度升高的温度有不同的发育反应。总之，高发育温度对卵特别致命，对幼虫不太致命，也影响成虫形态。这突出了了解温度变化对热带外温动物个体发育的影响的重要性。
Anthropogenic climate change is thought to present a significant threat to biodiversity, in particular to tropical ectotherms, and the effects of long‐term developmental heat stress on this group have received relatively little research attention. Here, we studied the effects of experimentally raising developmental temperatures on a tropical butterfly. We measured survival, development time, adult body mass and wing size ofHeliconius erato demophoon(Linnaeus) (Lepidoptera: Nymphalidae) across three temperature treatments. Egg survival was lower in the hotter treatments, with 84%, 73% and 49% of eggs hatching in the 20–30°C (fluctuating temperature with 12 h at 20°C followed by 12 h at 30°C), 23–33°C and 26–36°C treatments, respectively. Larval survival was three times lower in the 26–36°C treatment (8%) compared with the 20–30°C treatment (26%), and we did not detect differences in pupal survival across treatments due to high mortality in earlier stages. Under a moderately increased temperature at 23–33°C, larvae developed faster and adults had a higher body mass and wing loading, but this was not seen in the hottest treatment (26–36°C). Females were also heavier than males in the 23–33°C treatment, but there was no associated increase in wing size. This may suggest a different developmental response to moderately elevated temperatures between the sexes. In summary, high developmental temperatures are particularly lethal for eggs and less so for larvae and also affect adult morphology. This highlights the importance of understanding the effects of temperature variation across ontogeny in tropical ectotherms.