Mast (botany) Mast seeding is defined as the highly variable production of fruit by a population. These intermittent pulses of food resources drive ecosystem-level functions and forest dynamics. The difference between a mast seeding year and a non-mast seeding year can be thousands of acorns, hickory nuts, beech nuts, etc. Mast seeding dominantly occurs in wind-pollinated tree species, but has also been observed in grasses and Dipterocarps. Masting, in the strict sense of the term, occurs only in monocarpic (or semelparous) species, whose members reproduce only once during their lifetime, then die. Hypothesis for the evolution of mast seeding can broadly be
Beech-maple forest of American witch-hazel and alderleaf viburnum shrubs. The ground cover includes herbs and spring ephemerals, flowers which are able to bloom before the canopy fills in. Seedlings of beech and maple trees are shade-tolerant, allowing them to grow in low light conditions for several years. These seedling are waiting for an opening in the canopy, and grow rapidly when an opening is made by the death of a mature tree. Beech-maple forests are often found on flat or rolling terrain, in a variety of moist to well-drained soils with high levels of organic matter. They thrive in glacial till from