Range expansion refers to the process by which a species extends its geographic distribution to new areas beyond its historic range. This can occur due to various factors such as environmental changes, habitat modifications, human activity, or natural dispersal mechanisms. Range expansion can have both positive and negative impacts, affecting ecosystems, communities, and biodiversity. Research in this area involves studying the drivers, patterns, and consequences of species shifting their ranges, as well as developing management strategies to facilitate or control these expansions.