what does forest say that changed his mood?
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It's not just the jaguars that fight for space. Plants also establish their territory, often with subtlety: a falling leaf can chase away other species. “You see that there are almost only Guarantãs around here?” Asks Flaviana Souza, a botanist at the Forestry Institute, in an Atlantic Forest reserve in the city of Gália, southwest of São Paulo. Here the Guarantã, or Esenbeckia leiocarpa - the savanna's favorite nesting species - creates with their straight trunks up to 60 centimeters in diameter and 20 meters high a certain homogeneity amidst the disorder of the crooked and splintered trees of the neighborhood. In the laboratory, Flaviana found that guarantã leaves release substances that delay seed germination and cause other species to rot.