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Tuvalu is the fourth smallest nation in the world with a population of 11,000. Tuvalu is made up of nine inhabited islands five which are coral atolls and four made of land rising from the seabed. The environmental challenges Tuvalu faces include the impacts if a changing climate increasing sea level rises and weather events, increasing salination.

Mangrove is a type of forest growing along tidal mudflats and along shallow water coastal areas extending inland along rivers, streams and their tributaries where the water is generally brackish. The mangrove ecosystem is dominated by mangrove trees as the primary producer interacting with associated aquatic fauna, social and physical factors of the coastal environment.

Invasive alien species on islands have broad impacts across biodiversity, agriculture, economy , health and culture, which tend to be stronger than on contitents.