Ecology Letters (2021) 24, 698-707

Alexandra A. Mushegian, Naresh Neupane, Zachary Batz, Motoyoshi Mogi, Nobuko Tuno, Takako Toma, Ichiro Miyagi, Leslie Ries and Peter A. Armbruster (2021)
Ecological mechanism of climate-mediated selection in a rapidly evolving invasive species
Ecology Letters 24 (4), 698-707
Abstract: Recurring seasonal changes can lead to the evolution of phenological cues. For example, many arthropods undergo photoperiodic diapause, a programmed developmental arrest induced by short autumnal day length. The selective mechanisms that determine the timing of autumnal diapause initiation have not been empirically identified. We quantified latitudinal clines in genetically determined diapause timing of an invasive mosquito, Aedes albopictus, on two continents. We show that variation in diapause timing within and between continents is explained by a novel application of a growing degree day (GDD) model that delineates a location-specific deadline after which it is not possible to complete an additional full life cycle. GDD models are widely used to predict spring phenology by modelling growth and development as physiological responses to ambient temperatures. Our results show that the energy accumulation dynamics represented by GDD models have also led to the evolution of an anticipatory life-history cue in autumn.
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Database assignments for author(s): Peter Armbruster

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aedes albopictus		Japan
	Aedes albopictus		U.S.A. (NE)
	Aedes albopictus		U.S.A. (SE)