A dune with a steeper slope is likely to erode faster because it is more susceptible to wind and water erosion. Additionally, dunes located in areas with high winds or strong water currents will erode more quickly than dunes in calmer environments.
Wind, water, land-clearing, sand mining and vehicular traffic.
Sand Dunes erode over time usually, however, in the desert it is possible for sand from one dune to be blown off and form another dune. Over time that single dune could "migrate" in a way. Sand dunes on the beach however usually just erode over time, they do not usually move.
Sand dunes are continuously changing due to wind moving the sand around. The appearance of an area covered with sand dunes might remain similar for very long periods of time but the details can well have changed considerably.
Sand dunes are not a permanent feature. They erode as the wind changes. If you want to stop one from eroding you would need to cap it with concrete or stabilize it with groundcover. You could also erect a wind barrier like a snow fence.
Endangered seabirds live in the dunes breeding their young. When people go in the dunes the scare the birds litter smash their eggs.
Planting grass and other seaside vegetation will slow erosion. The roots help to bind the sand together making it more difficult for wind and rain to erode the dunes.
Erode is the Capital of the Erode District.
Seif dunes and star dunes in Algeria
Large piles of sand are called dunes.
There are only two sand dunes in Michigan. The two sand dunes are Sleeping Bear Dunes and Sliver lake sand dunes.
Fore dunes and back dunes but mostly fore dunes.