1. Acacia Trees
When animals like giraffes begin munching on their leaves, Acacia trees swiftly release ethylene gas into the air.
This invisible warning signal drifts to nearby acacias, prompting them to ramp up production of bitter tannins in their leaves—a natural defense that makes them unappetizing to herbivores.
This fascinating chemical signaling, observed in African savannas, is a classic example of plant-to-plant communication.
It highlights how plant “conversations” can shape entire landscapes and influence animal behavior.
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