Wind Exposure and Distribution of Pitcherplant Mosquito (Diptera: Culicidae)

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Abstract
In western Newfoundland the pitcherplant mosquito, Wyeomyia smithii (Coquillett), is absent from many potential habitat patches (bogs with populations of the purple pitcher plant, Sarracenia purpurea ). Bog size, pitcher-plant density, and wind exposure in bogs were estimated and ranked. Rank ordered variables were intercorrelated and any single variable had significant predictive power for mosquito occurrence, but only wind exposure was significant in a multiple regression. Bogs exposed to wind harbored smaller or no mosquito populations. A likely explanation for this pattern is that reduced winter snow cover induces high overwinter mortality of diapausing mosquito larvae.

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