The article "Alien species in a warmer world: risks and opportunities" by Gian-Reto Walther et al. discusses the impacts of climate change on biological invasions and the role of alien species in a dynamic context of shifting species' ranges and changing communities. The authors emphasize that global warming has enabled alien species to expand into regions where they previously could not survive, affecting the dynamics of native and alien species. They review climate-mediated invasions of plants, invertebrates, fishes, and birds, highlighting how climate change influences the sequential stages of an invasion process. The article also explores how climate change can provide new opportunities for introductions, facilitate colonization and successful reproduction, enable population persistence and spread, and blur the migration and invasion boundaries. The consequences of climate-mediated invasions are discussed, including the transformation of ecosystems and the challenges for biodiversity management. The authors conclude that with continued climate change, the distinction between native and alien species becomes increasingly blurred, and management practices regarding 'new' species must consider the dynamic context of shifting species' ranges and changing community compositions.The article "Alien species in a warmer world: risks and opportunities" by Gian-Reto Walther et al. discusses the impacts of climate change on biological invasions and the role of alien species in a dynamic context of shifting species' ranges and changing communities. The authors emphasize that global warming has enabled alien species to expand into regions where they previously could not survive, affecting the dynamics of native and alien species. They review climate-mediated invasions of plants, invertebrates, fishes, and birds, highlighting how climate change influences the sequential stages of an invasion process. The article also explores how climate change can provide new opportunities for introductions, facilitate colonization and successful reproduction, enable population persistence and spread, and blur the migration and invasion boundaries. The consequences of climate-mediated invasions are discussed, including the transformation of ecosystems and the challenges for biodiversity management. The authors conclude that with continued climate change, the distinction between native and alien species becomes increasingly blurred, and management practices regarding 'new' species must consider the dynamic context of shifting species' ranges and changing community compositions.