The occurrence of sandy soils in rainforests influences water drainage, nutrient availability, and plant biodiversity. The sandy texture allows for faster water infiltration and drainage compared to heavier clay soils, which can contribute to the diversity of plant species that can thrive in this environment.
Examples of rainforests with sandy soils include the Amazon rainforest where sandy soils can be found near riverine areas where the sediment accumulates creating sand bars. Also, parts of the Southeast Asian rainforest have sandy soils, especially in coastal areas.