Shifting of the life cycle and life‐history traits of the fall webworm in relation to climate change

Gomi, Tomoharu; Nagasaka, Masami; Fukuda, Takahiro; Hagihara, Hideharu

doi:10.1111/j.1570-7458.2007.00616.x

Cited by 95 publications

(66 citation statements)

References 28 publications

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“…Among arthropods, critical photoperiod (an overt expression of the photoperiodic timer) increases regularly with latitude or altitude, that is, is negatively correlated with length of the growing season (Taylor and Spalding, 1986;Danks, 1987, Table 24) and responds rapidly to selection during periods of rapid climate change in nature (Bradshaw and Holzapfel, 2001;Gomi et al, 2007). Among natural populations of W. smithii, the period of the response to NH is not significantly correlated with latitude, with altitude or with amplitude of the response to NH (Bradshaw et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Genetic correlations and the evolution of photoperiodic time measurement within a local population of the pitcher-plant mosquito, Wyeomyia smithii

2011

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The genetic relationship between the daily circadian clock and the seasonal photoperiodic timer remains a subject of intense controversy. In Wyeomyia smithii, the critical photoperiod (an overt expression of the photoperiodic timer) evolves independently of the rhythmic response to the Nanda-Hamner protocol (an overt expression of the daily circadian clock) over a wide geographical range in North America. Herein, we focus on these two processes within a single local population in which there is a negative genetic correlation between them. We show that antagonistic selection against this genetic correlation rapidly breaks it down and, in fact, reverses its sign, showing that the genetic correlation is due primarily to linkage and not to pleiotropy. This rapid reversal of the genetic correlation within a small, single population means that it is difficult to argue that circadian rhythmicity forms the necessary, causal basis for the adaptive divergence of photoperiodic time measurement within populations or for the evolution of photoperiodic time measurement among populations over a broad geographical gradient of seasonal selection. Heredity (2012) 108, 473-479; doi:10.1038/hdy.2011.108; published online 9 November 2011Keywords: linkage; pleiotropy; photoperiodism; circadian rhythmicity; antagonistic selection INTRODUCTION Herein we are concerned with the genetic and evolutionary relationship between the photoperiodic timer that serves to organize seasonal events and the circadian clock that serves to organize daily events in the life histories of animals. 'Only model organisms live in a world of endless summer; most organisms in nature confront a seasonal environment. Fitness in a seasonal environment involves the abilities to exploit the favorable season, to avoid or mitigate the effects of the unfavorable season, and to make a timely transition between the two lifestyles' (Bradshaw et al., 2004). Timing is of the essence. Organisms cannot wait for the onset of winter but must have physiological mechanisms that enable them to prepare for the winter in advance. A wide variety of animals from rotifers to rodents use the length of the day (photoperiod) as an anticipatory cue in preparation for the changing seasons. Examples include the use of day length to cue the seasonal timing of migration in birds, to cue the seasonal timing of reproduction in mammals, and to cue the seasonal timing of diapause (dormancy) in arthropods (Bradshaw and Holzapfel, 2007a). Photoperiodic response is typically determined by exposing animals to a range of day lengths and plotting percent response as a function of hours of light per day to which they were exposed (Figure 1a). Photoperiodic response curves are usually sigmoid in shape and the day length that promotes a response in 50% of a sample population defines the critical photoperiod (hereafter, CPP) that is used as a proxy for the photoperiodic response curve.For more than 75 years, it has been hypothesized that the causal basis of the seasonal photoperiodic timer is controlled by ...

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Section: Discussionmentioning

confidence: 99%

Genetic correlations and the evolution of photoperiodic time measurement within a local population of the pitcher-plant mosquito, Wyeomyia smithii

2011

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“…In Japan, the American fall webworm Hyphantria cunea shifted from having two generations per year to three in at least a part of its range; in addition, important changes in some life-history traits, such as the crucial photoperiod for diapause induction, have occurred, enabling the species to expand its range, mainly towards the north of Japan [42]. Similarly, in European mountain forests, the native spruce bark beetle Ips typographus is changing voltinism as a consequence of the disproportionately large warming at high elevations [43], which could result in unprecedented outbreaks, as seen with the mountain pine beetle Dendroctonus ponderosae in British Columbia, Canada [44].…”

Section: Facilitating Colonization and Successful Reproductionmentioning

confidence: 99%

Alien species in a warmer world: risks and opportunities

Walther¹,

Roques²,

Hulme³

et al. 2009

Trends in Ecology & Evolution

1,139

911

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“…The correlation coefficient is significant in the preoviposition period (pϽ0.05) and the other developmental stages (pϽ0.01). The data of the Fukui population were taken from Gomi et al (2007).…”

Section: Developmental Ratementioning

confidence: 99%

Northerly shift in voltinism watershed in Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) along the Japan Sea coast: Evidence of global warming?

Gomi

Adachi

Shimizu

et al. 2009

Appl. Entomol. Zool.

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The effects of climate change on the northern limit of the trivoltine area were clarified in the fall webworm, Hyphantria cunea (Drury) (Lepidoptera: Arctiidae). The Takaoka and Kanazawa populations used in the present study occur in locations to the north of Fukui (36.07°N), where H. cunea has recently shifted from a bivoltine to a predominantly trivoltine life cycle. The life-history traits of these populations were investigated and compared to those in the Fukui population. The lower threshold temperature for development and the thermal constant for one generation were 11.3°C and 674.5°d in the Takaoka population, and 11.2°C and 680.7°d in the Kanazawa population. The critical photoperiod for diapause induction at 25°C was 14 h 34 min in the Takaoka population and 14 h 28 min in the Kanazawa population. These critical photoperiods at 25°C were longer by 24 min and 18 min than the Fukui population, respectively. These results, together with climate data, suggest that the Takaoka population maintains a bivoltine life cycle, and a small part of the Kanazawa population has three generations per year, a predominantly bivoltine life cycle. Thus, the present northern limit of the trivoltine area lies around Fukui in districts along the Japan Sea.

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Shifting of the life cycle and life‐history traits of the fall webworm in relation to climate change

Cited by 95 publications

References 28 publications

Genetic correlations and the evolution of photoperiodic time measurement within a local population of the pitcher-plant mosquito, Wyeomyia smithii

Genetic correlations and the evolution of photoperiodic time measurement within a local population of the pitcher-plant mosquito, Wyeomyia smithii

Alien species in a warmer world: risks and opportunities

Northerly shift in voltinism watershed in Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) along the Japan Sea coast: Evidence of global warming?

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