Acorns Abound!
While working in my garden this autumn, I noticed there were more acorns than in previous fall seasons. The ground was carpeted by oak nuts. Is this abundance of acorns a harbinger of a severe winter? In fact, it is not. It is a mast year. Mast is a term derived from Old English mæst , which means the fruit of forest shrubs and trees, which are wind-pollinated species. What are nature’s signs of a mast year? The characteristics are synchronization : simultaneous widespread production of large seed quantities of many trees , and high seed production : a thick ground acorn layer, a single oak tree may drop thousands of acorns. Why does this phenomenon occur? There are three categories of hypotheses . Economies of scale can be due to predator satiatio n (a proportion of seeds can escape consumption and lead to new trees) or pollination efficienc y (from reproductive synchronization). Both ideas assume that a variable, large reprod...