Wetlands
		Parco Delta del Po presents a variety of habitats, the most representative among them being wetlands. This term is used to refer to areas which are partly aquatic and partly terrestrial. Their importance lies mainly in their extraordinary biological productivity; in other words, these flooded areas are some of the "richest in life" of the planet Earth. The definition of "wetland" has always been controversial, since it includes several types of different ecosystems sharing a common element: water. Wetlands represent one of the few ecosystems to be protected by an international treaty, signed in Ramsar (Iran) in 1971. On that occasion, an official definition of "wetlands" was also laid out. Italy adopted such definition by the D.P.R. n.448 of March 13th, 1976: a wetland is defined in the Convention as being an area of marsh, fen, peatland or water basins, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt and including areas of intertidal marine water whose depth never exceeds 6 metres during ebb tide periods.