How Vegetation Affects the Growth and Migration of Run Hill Dune

Figure 4. Grasses slow the migration of Run Hill Dune. (Photograph by Blair Tormey. More about the photograph)

The northeast winds are generally stronger than those from the southwest, causing the Run Hill Dune to migrate overall to the southwest. Though sea oats, sea grapes, and American beach grass growing on the dune tend to slow its migration, there is simply not enough vegetation to keep Run Hill Dune in place.

Figure 4 shows vegetation growing in the shadow of northeasterly winds, acting to trap sand and slow the igration of the Run Hill Dune.