The article discusses how forests are crucial for biodiversity and global ecosystems. It explains that the loss of forest areas is a major driver of biodiversity decline, especially in tropical rainforests. The decrease in tree diversity can lead to reduced forest productivity and ecosystem services like timber production. Maintaining tree diversity is essential for preserving ecosystem functions and providing benefits for humans. The study estimates that a 10% decline in tree species richness could result in a 2-3% reduction in global forest productivity, highlighting the importance of safeguarding forest biodiversity for our well-being.