"Expressions of the estuarine biome occur at wide lower courses of a rivers where they flow into a sea. Estuaries experience tidal flows and their water is a changing mixture of fresh and salt."^^ . . "estuarine biome"^^ . . "ENVO"^^ . "pbuttigieg"^^ . "ENVO:01000020"^^ . "2010-03-15T11:17:06Z"^^ . "SPIRE:Estuarine"^^ .