What where the first living things to grow successfully on newly formed sand dune?

The first living things to successfully grow on newly formed sand dunes are typically pioneer species, with beach grasses being among the most common. These plants, such as American seagrass and marram grass, have adaptations that allow them to thrive in harsh, sandy, and nutrient-poor environments. Their root systems help stabilize the sand, facilitating the development of a more diverse ecosystem over time. Eventually, this leads to the establishment of more complex plant communities.