Shrub encroachment refers to the process in which shrubs increase in density and cover within an ecosystem, often at the expense of grasses or other vegetation types. This phenomenon can have significant ecological impacts, such as altering nutrient cycling, changing habitat structure and impacting biodiversity. Shrub encroachment is influenced by factors such as climate change, land use practices, and disturbance regimes. Researchers study this process to better understand its causes, ecological consequences, and potential management strategies.