A tropical rainforest evokes
images of thick, lush
Four different layers make up the rain forest biome.
• The top layer, known as the emergent layer,
consists of the tops of the tallest trees that rise
above the rest of the forest. They get lots of sunlight
and help protect the layers of forest below.
• The canopy, the next layer down, consists of the
crowns of the other tall trees that grow close
together, blocking much of the sunlight from
reaching lower layers.
• The understory consists of small trees, bushes and
plants that require almost no sunlight to survive.
• The bottom layer receives almost no sunlight, but
contains the decaying materials from upper layers.