dune ecosystem

例句：

1. 1. The dunes are home to a variety of plant and animal species.
   沙丘是各种植物和动物的家园。
2. 2.The dunes provide habitat for migratory birds during the winter months.
   沙丘在冬季为候鸟提供了栖息地。
3. 3.The study of dune ecosystems is important for understanding how landforms change over time.
   研究沙丘生态系统对于理解土地形态随时间变化非常重要。