Yellow Dune

Imagine a big pile of sand, but not just any sand! Yellow dunes are sandy hills that pop up after tiny baby dunes, called embryo dunes, get started. They are usually about as tall as a school bus! They look yellow because they don't have much dark, rich dirt, called humus, mixed in. This makes them a bit like a sandy playground that's always changing.

Even though it's mostly sand, plants can grow on yellow dunes! About 80% of the dune is covered in green plants, like tough grasses. These plants are super strong and have long roots to slurp up every little bit of water they can find. They can handle the slightly salty sand, which is pretty amazing. These plants help hold the sand together so the dune doesn't blow away.

Yellow dunes are like a growing family! When a yellow dune gets bigger, a new baby dune, called an embryo dune, starts to form right in front of it. It's like the big dune is making space for its little sibling to grow. This is how sand dunes slowly move and change shape over time, creating new sandy landscapes along the coast.

Yellow dunes are important because they are like a first step for bigger dunes to form. The plants that grow there are special because they can survive in tough, sandy places. They help stop the sand from blowing away too much. These dunes show us how nature can create homes for plants and animals even in places that seem a little bare at first.