Vistula Lagoon million. However, major ecological considerations stand in the way. For example, mammal migration along the lagoon could be disrupted. Also, the inflow of brackish waters from the Baltic sea could result in serious unbalancing of the lagoon's freshwater ecosystem. From 1772 until 1918, the lagoon was part of the Kingdom of Prussia, which had become part of the German Empire in 1871. Between 1920 and 1946 it was split between Germany and the Free City of Danzig. At present state since 1945 its eastern part belongs to Russia (formerly USSR), Poland has 43.8% of its area at lagoon's western side.
Waituna Lagoon Waituna Lagoon The Waituna Lagoon is on the southern coastline of the South Island of New Zealand. It forms part of the Awarua Wetland, a Ramsar site that was established in 1976. The lagoon is an important habitat for resident and migratory birds with seventy three different species being recorded. The expansion in the area of "Leptocarpus" rushes that has been observed over a 47-year period in the lagoon have been attributed to artificial openings of the lagoon to the sea, and the increase in sedimentation. The lagoon is largely unmodified by human activity but there are elevated nutrient levels