Sand dune ecosystems are unique environments formed by the accumulation of sand, typically along coastlines or in deserts. These areas are characterized by shifting sands, which create a dynamic landscape that supports specialized plant and animal species. Common vegetation includes grasses and shrubs that have adapted to withstand strong winds and limited water availability. The fauna in sand dune ecosystems includes various species of insects, birds, and small mammals that have evolved to thrive in these harsh conditions. These ecosystems play a crucial role in protecting coastal areas from erosion and providing habitats for wildlife, making them important for biodiversity and ecological balance.