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    Author(s): Patrick C. Tobin; Sudha Nagarkatti; Greg Loeb; Michael C. Saunders
    Date: 2008
    Source: Global Change Biology. 14: 951-957.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (270.36 KB)

    Description

    Climate change can cause major changes to the dynamics of individual species and to those communities in which they interact. One effect of increasing temperatures is on insect voltinism, with the logical assumption that increases in surface temperatures would permit multivoltine species to increase the number of generations per year. Though insect development is primarily driven by temperature, most multivoltine insect species rely on photoperiodic cues, which do not change from year-to-year or in response to climate warming, to initiate diapause. Thus, the relationship between climate change and voltinism could be complex. We use a phenology model for grape berry moth, Paralobesia viteana (Clemens), which incorporates temperature-dependent development and diapause termination, and photoperiod-dependent diapause induction, to explore historical patterns in year-to-year voltinism fluctuations. We then extend this model to predict voltinism under varying scenarios of climate change to show the importance of both the quality and quantity of accumulated heat units.

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    Citation

    Tobin, Patrick C.; Nagarkatti, Sudha; Loeb, Greg; Saunders, Michael C. 2008. Historical and projected interactions between climate change and insect voltinism in a multivoltine species. Global Change Biology. 14: 951?957.

    Keywords

    climate change, diapause, insect population dynamics, phenology, photoperiod, seasonality, voltinism

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