Invasive mosquitoes are expanding their ranges into new geographic areas and interacting with resident mosquito species. Understanding how novel interactions can affect mosquito population dynamics is necessary to predict transmission risk at invasion fronts. Mosquito life-history traits are extremely sensitive to temperature, and this can lead to temperature-dependent competition between competing invasive mosquito species. We explored temperature-dependent competition between Aedes aegypti and Anopheles stephensi, two invasive mosquito species whose distributions overlap in India, the Middle East, and North Africa, where An. stephensi is currently expanding into the endemic range of Ae. aegypti. We followed mosquito cohorts raised at different intraspecific and interspecific densities across five temperatures (16–32°C) to measure traits relevant for population growth and to estimate species’ per capita growth rates. We then used these growth rates to derive each species’ competitive ability at each temperature. We find strong evidence for asymmetric competition at all temperatures, with Ae. aegypti emerging as the dominant competitor. This was primarily because of differences in larval survival and development times across all temperatures that resulted in a higher estimated intrinsic growth rate and competitive tolerance estimate for Ae. aegypti compared to An. stephensi. The spread of An. stephensi into the African continent could lead to urban transmission of malaria, an otherwise rural disease, increasing the human population at risk and complicating malaria elimination efforts. Competition has resulted in habitat segregation of other invasive mosquito species, and our results suggest that it may play a role in determining the distribution of An. stephensi across its invasive range.

中文翻译：

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评估两根侵入蚊物种之间依赖于温度的竞争

侵入蚊子正在扩大其范围到新的地理区域，并与驻地蚊种交互。了解新的相互作用如何影响蚊子的种群动态有必要在入侵方面来预测传播的风险。蚊子的生活史特征对温度极为敏感，这会导致竞争侵入蚊种间随温度变化的竞争。我们探讨之间随温度变化的竞争埃及伊蚊和按蚊，两根侵入蚊种，其分布在印度，中东和北非地区，其中重合的。按蚊目前正在扩大到的特有范围阂。埃及. 我们跟踪了在五种温度（16-32°C）下以不同种内和种间密度饲养的蚊子群，以测量与人口增长相关的特征并估计物种的人均增长率。然后，我们使用这些增长率得出每个物种在每个温度竞争能力。我们发现在所有的温度不对称的竞争中，凭借有力的证据阂。伊蚊正在成为占主导地位的竞争对手。这主要是因为跨导致更高的估计禀增长率和竞争容忍估计所有的温度在幼虫生存和发展时间的差异阂。伊蚊相比的。按蚊。传播的。按蚊进入非洲大陆可能导致疟疾，否则农村疾病的传播城市，在风险增加的人口和复杂的消灭疟疾的努力。竞争导致了其他侵入蚊种的栖息地隔离，和我们的研究结果表明，它可能在确定的分配中发挥作用的。按蚊在其侵入性范围。