Abstract

Tree pollen in SW Ontario arrives while local trees are barely awake from winter dormancy. How much of our seasonal pollen is imported? A model for Mulberry pollen migration was proposed which could subsequently be generalized to explain augmentation of pollen counts in our area. Mulberry pollen typically constitutes >25% of the annual counts, yet mulberry trees are very scarce here; local sources are negligible. The conceptual model presumes pollen migration, prevailing wind patterns, travel distances (time), potential for accrual or loss of pollen enroute AND contribution from local sources.

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