Mast years increase wind pollination and reduce seed predation in sugar maple (<i>Acer saccharum</i>)

We showed geographic variation in patterns of A. saccharum seed production in comparison to past research. We also showed that synchronous flowering increases wind pollination more than insect pollination and that it decreases seed predation. Acer saccharum is dichogamous; protogynous trees were more likely to flower in mast years, and protandrous trees experienced larger benefits from wind-pollination in mast years. These results highlight masting trees as interesting study systems for future research on sex allocation.