Temperature fluctuations interact with means to impact life history traits in Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

IF 2.9 2区 生物学 Q2 BIOLOGY
Anchal Padukone, Kimberly S. Sheldon
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引用次数: 0

Abstract

Temperature variability associated with climate change is expected to impact insect performance and alter the ecological and economic impacts of both beneficial and pest species. However, our current understanding of how temperature impacts insect performance is not based on the fluctuating temperatures insects experience in their natural environments or the impact of these fluctuations over the lifespan. Yet, thermal performance curves vary for different organismal traits and life stages, and, thus, understanding the impacts of temperature fluctuations requires measures of multiple traits across the full life cycle. Using fall armyworm Spodoptera frugiperda, a global insect pest, we designed a full factorial experiment with a wide range of temperature treatments to study the effects of temperature mean and fluctuations on survival, development and/or reproduction in each life stage. Our results show interactive effects of mean temperature and the magnitude of daily fluctuations on survival to maturity, development time, and pupal mass as well as on the number of eggs laid by females and subsequent egg hatching. However, the impacts of temperature fluctuation varied across life stages: at the warmest mean temperature, larger fluctuations significantly reduced larval and pupal survival but not adult survival relative to constant temperatures. Our results demonstrate the importance of explicitly considering the biological effects of fluctuating temperatures across traits and life stages since these effects may become more salient under climate warming. Understanding how temperature fluctuations impact the entire life cycle of insects can support more accurate forecasts of insect populations under climate change.
温度波动与影响夜蛾生活史性状的手段相互作用(鳞翅目:夜蛾科)
与气候变化相关的温度变率预计会影响昆虫的生产性能,并改变有益和有害物种的生态和经济影响。然而,我们目前对温度如何影响昆虫性能的理解并不是基于昆虫在自然环境中经历的温度波动或这些波动对其寿命的影响。然而,不同的生物特征和生命阶段的热性能曲线是不同的,因此,了解温度波动的影响需要在整个生命周期内测量多个特征。利用全球性害虫——秋粘虫(Spodoptera frugiperda)设计了全因子实验,研究了温度平均和波动对秋粘虫各生命阶段生存、发育和/或繁殖的影响。我们的研究结果表明,平均温度和日波动幅度对成虫存活到成熟、发育时间、蛹质量以及雌虫产卵数和随后的卵孵化都有交互影响。然而,温度波动的影响在不同的生命阶段有所不同:在最温暖的平均温度下,较大的波动显著降低了幼虫和蛹的存活率,但与恒温相比,成虫的存活率没有下降。我们的研究结果表明了明确考虑温度波动在性状和生命阶段的生物学效应的重要性,因为这些效应在气候变暖下可能变得更加突出。了解温度波动如何影响昆虫的整个生命周期,有助于更准确地预测气候变化下的昆虫种群。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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