the relation is not constant in all dunes of a given shape or in all localities. The wind is retarded near the surface by friction. Next, in Giving Blood, by Sherman Alexie, the protagonist is in need of money for a cab fare goes to a blood donation bank. Eventually, a build-up of humus from all the decaying vegetation will develop the sand into a sandy soil, capable of supporting pasture grasses and bushes.
Seif dunes are common in the Sahara. The consequence for this happening is there will be no stumps or stacks and the force of the ocean will wash away the dunes until it finds more. Zonation in dune communities reflects the different conditions of each section. University of California Press, Berkeley. Some California dunes with crests only 30 feet high may advance 50 feet a year, posing a serious threat to nearby farms and roads.