This study analyzes 100 time-series datasets from biomes across the globe to assess changes in biodiversity. The research reveals that while community composition changes systematically over time, there is no consistent loss of alpha diversity (species richness). Temporal beta diversity, which measures changes in community composition, shows consistent long-term changes. The study highlights that biodiversity change is more evident in community composition than in species richness, suggesting that biodiversity loss may not be systematic. Factors such as environmental change, species range shifts, and biotic homogenization may explain these patterns. The findings indicate that local and regional assemblages experience taxonomic substitution rather than systematic loss. The results also show that temporal beta diversity increases relative to a baseline sample, indicating changes in species composition. The study emphasizes the importance of monitoring species composition changes for conservation efforts, as these changes may lead to the development of novel ecosystems. The research underscores the need to shift focus from biodiversity loss to biodiversity change in conservation planning.This study analyzes 100 time-series datasets from biomes across the globe to assess changes in biodiversity. The research reveals that while community composition changes systematically over time, there is no consistent loss of alpha diversity (species richness). Temporal beta diversity, which measures changes in community composition, shows consistent long-term changes. The study highlights that biodiversity change is more evident in community composition than in species richness, suggesting that biodiversity loss may not be systematic. Factors such as environmental change, species range shifts, and biotic homogenization may explain these patterns. The findings indicate that local and regional assemblages experience taxonomic substitution rather than systematic loss. The results also show that temporal beta diversity increases relative to a baseline sample, indicating changes in species composition. The study emphasizes the importance of monitoring species composition changes for conservation efforts, as these changes may lead to the development of novel ecosystems. The research underscores the need to shift focus from biodiversity loss to biodiversity change in conservation planning.