Dust in the wind
The wind scatters phosphorus rich dust from the Sahara Desert 6;000 miles across the Atlantic to the Amazon Rainforest. Without this nourishing dust the forest would die.
When the floods come in the next season, they wash the phosphorous out of the soil, down river, and into the sea to feed new algal blooms…”completing a circle thousands of miles wide and thousands of years in the making.”
Because the dust began as living organisms…microscopic silica based algae called Diatoms who exhale more oxygen than all the world’s rainforests.
Before the Sahara was a desert, when it was a land of huge lakes, Diatoms filled the waters. When the lakes dried up, the billions of dead diatoms made up the dust that now feeds the Amazon and the Atlantic.
https://www.earthdate.org/episodes/dust-in-the-wind