Salt marshes
Indice
The salt marshes (barene) are characteristic features of the Venetian Lagoon. They appear as flat islets of fine silty sediment, rising only a few dozen centimetres above mean sea level and becoming submerged during higher tides. They form through the accumulation of fine sediments carried by currents and are characterised by halophytic plants adapted to salinity, such as sea lavender (Limonium), glasswort (Salicornia) and cordgrass (Spartina). The vegetation shows a clear succession of species, varying across height differences of just a few centimetres, from the outer edges towards the more central areas. A distinctive feature of the salt marshes is the presence of ghebi, small natural channels that cut across their surfaces. Together with the larger channels, these provide drainage and support water circulation, as well as the transport of sediments and organic matter through barene and marshes. These habitats support a rich variety of aquatic life, including small crustaceans, molluscs and fish fry, which use them as shelter for growth and reproduction. Connected to the ghebi are chiari and paciare, natural depressions within the salt marshes that retain water even at low tide. The chiari are important feeding grounds for waterbirds such as herons and black-winged stilts, which feed on the small fish and invertebrates found there. These areas also help regulate water levels by holding water and encouraging sediment deposition, contributing to the stability of the salt marshes. The salt marshes are fragile environments threatened by several factors, including erosion caused by waves and currents, boat traffic and rising sea levels. To counter these pressures, restoration measures have been introduced, including sediment replenishment with material dredged from the lagoon bed, planting of species suited to soil stabilisation, and the construction of protective works along their edges. Alongside their ecological importance, the salt marshes also have great historical and cultural value. For centuries they were part of the lagoon economy, used for salt collection and as fishing grounds. Today, their conservation is essential to safeguard the balance of the Venetian Lagoon, preserve biodiversity and protect the inner areas from tidal forces.