Mosquito thermal tolerance is remarkably constrained across a large climatic range.
Mosquito thermal tolerance is remarkably constrained across a large climatic range.
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蚊子的耐热性在很大的气候范围内受到显着限制。
DOI：
10.1101/2023.03.02.530886
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Mordecai,ErinA
中科院分区：
文献类型：
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作者：
Couper,LisaI;Farner,JohannahE;Lyberger,KelseyP;Lee,AlexandraS;Mordecai,ErinA
对于大多数物种来说，蚊子如何应对快速气候变暖仍然是未知的，但将对其未来的分布产生重大影响，对人类福祉，生物多样性和生态系统功能产生级联影响。我们调查了适应潜力的一个广泛的蚊子物种，伊蚊sierrensis，在一个大的气候梯度进行一个共同的花园实验测量蚊子的生活史特征的热极限。虽然现场收集的人口起源于跨越1200公里的热环境差异很大，我们发现有限的变化，在人口之间的耐热性上限。特别是，所有生活史特征的温度上限在整个物种范围内的变化小于3°C，对于大多数特征，种群之间没有显着差异。对于一个生活史特征蛹的发展速度，我们没有检测到显着的变化，在人口之间的上限温度，这种变化是强烈相关的源温度，提供了证据，当地的热适应蛹的发展。然而，我们发现，大多数物种的范围内的最高环境温度已经经常超过恒温下估计的最高上限。这一结果表明，应对和/或避免极端温度的策略可能是当前和未来蚊子热耐受性的关键组成部分。
How mosquitoes may respond to rapid climate warming remains unknown for most species, but will have major consequences for their future distributions, with cascading impacts on human well-being, biodiversity and ecosystem function. We investigated the adaptive potential of a wide-ranging mosquito species,Aedes sierrensis, across a large climatic gradient by conducting a common garden experiment measuring the thermal limits of mosquito life-history traits. Although field-collected populations originated from vastly different thermal environments that spanned over 1200 km, we found limited variation in upper thermal tolerance between populations. In particular, the upper thermal limits of all life-history traits varied by less than 3°C across the species range and, for most traits, did not differ significantly between populations. For one life-history trait—pupal development rate—we did detect significant variation in upper thermal limits between populations, and this variation was strongly correlated with source temperatures, providing evidence of local thermal adaptation for pupal development. However, we found that maximum environmental temperatures across most of the species' range already regularly exceed the highest upper thermal limits estimated under constant temperatures.This result suggests that strategies for coping with and/or avoiding thermal extremes are likely key components of current and future mosquito thermal tolerance.