Dune systems are natural formations created by the accumulation of sand, typically found in coastal or desert environments. They are shaped by wind and water, which transport and deposit sand particles, leading to the development of various types of dunes, such as barchan, parabolic, and linear dunes. These systems play a crucial role in protecting shorelines and providing habitats for various plant and animal species. Dune systems are dynamic and can change over time due to environmental factors like wind patterns, vegetation, and human activity. They often serve as important ecosystems, supporting unique flora and fauna adapted to sandy conditions. Additionally, they can help prevent erosion and act as natural barriers against storms and flooding.