Competition and resource depletion shape the thermal response of population fitness in Aedes aegypti.
Competition and resource depletion shape the thermal response of population fitness in Aedes aegypti.
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DOI：
10.1038/s42003-022-03030-7
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发表时间：
2022-01-19
影响因子：
5.9
通讯作者：
Cator LJ
中科院分区：
文献类型：
--
作者：
Huxley PJ;Murray KA;Pawar S;Cator LJ
结合实验室测量的生活史特征的温度依赖性的数学模型越来越多地被用于预测气候变暖将如何影响外温动物，包括疾病媒介和其他节肢动物。这些温度性状的关系通常是在实验室条件下测量的，忽略了在资源枯竭的环境中的同种竞争-一种自然界中常见的情景-调节自然种群。在这里，我们使用实验室实验的蚊子埃及伊蚊，结合阶段结构的人口模型，调查这个问题。我们发现，在生态现实的资源枯竭环境中，幼虫竞争的加剧可以显着降低媒介在整个温度范围内的最大种群水平的适合度，导致适合度的最佳温度下降约6 °C，并收缩其热生态位宽度约10 °C。我们的研究结果提供了证据，在预测节肢动物种群将如何应对气候变暖时，考虑资源枯竭下的种内竞争的重要性。Huxley等人使用实验室实验来研究环境资源枯竭如何影响在埃及伊蚊中观察到的温度依赖性特征。作者发现，幼虫的同种竞争动态显着改变了蚊子的种群水平适应性对温度的反应，揭示了节肢动物和其他疾病媒介如何应对环境变化。
Mathematical models that incorporate the temperature dependence of lab-measured life history traits are increasingly being used to predict how climatic warming will affect ectotherms, including disease vectors and other arthropods. These temperature-trait relationships are typically measured under laboratory conditions that ignore how conspecific competition in depleting resource environments—a commonly occurring scenario in nature—regulates natural populations. Here, we used laboratory experiments on the mosquito Aedes aegypti, combined with a stage-structured population model, to investigate this issue. We find that intensified larval competition in ecologically-realistic depleting resource environments can significantly diminish the vector’s maximal population-level fitness across the entire temperature range, cause a ~6 °C decrease in the optimal temperature for fitness, and contract its thermal niche width by ~10 °C. Our results provide evidence for the importance of considering intra-specific competition under depleting resources when predicting how arthropod populations will respond to climatic warming. Huxley et al. use laboratory experiments to examine how environmental resource depletion impacts temperature-dependent traits observed in Aedes aegypti mosquitoes. The authors find that the conspecific competition dynamics of larvae significantly alter how the mosquito’s population-level fitness responds to temperature, shedding light on how arthropods and other disease vectors may respond to environmental change.
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DOI：
10.1098/rspb.2020.2817
发表时间：
2021-03-31
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Beltran RS;Kilpatrick AM;Breed GA;Adachi T;Takahashi A;Naito Y;Robinson PW;Smith WO Jr;Kirkham AL;Burns JM
通讯作者：
Burns JM
DOI：
10.1098/rspb.2019.1411
发表时间：
2020-02-12
影响因子：
4.7
作者：
Amarasekare, Priyanga;Simon, Margaret W.
通讯作者：
Simon, Margaret W.
影响因子：
6.5
作者：
COLE, LC
通讯作者：
COLE, LC
影响因子：
3.7
作者：
Couret J;Dotson E;Benedict MQ
通讯作者：
Benedict MQ
影响因子：
4.2
作者：
Chouaia B;Rossi P;Epis S;Mosca M;Ricci I;Damiani C;Ulissi U;Crotti E;Daffonchio D;Bandi C;Favia G
通讯作者：
Favia G