(Wikipedia) - Anzali Lagoon
Coordinates: 37°28′16″N 49°27′44″E / 37.47111°N 49.46222°E / 37.47111; 49.46222Anzali Lagoon
Anzali Lagoon (also Anzali Mordab, Anzali Bay, Pahlavi Mordab, Pahlavi Bay or Anzali Liman) is a coastal liman, or lagoon, in the Caspian Sea near Bandar-e Anzali, in the northern Iranian province of Gilan. The lagoon divides Bandar-e Anzali into two parts, and is home to both the Selke Wildlife Refuge and the Siahkesheem Marsh.
Although the lagoon suffers from pollution, it is known as a good place for bird watching. The lagoon''s water ranges from fresh near the tributary streams to brackish near the mouth into the harbor and the sea. Studies indicate that in the 19th and early 20th Centuries that the lagoon had a much higher salinity.
The lagoon has decreased in size since the 1930s to less than a quarter of its former extent. However, in the last ten years (As of 2007) water salinity has increased both by the rise of the level of the Caspian Sea which has caused greater interchange of waters, and due to greater salt transport in incoming "fresh" water due to increased upstream irrigation.
The lagoon has been designated a Ramsar site. Contents
FisheryAnzali Lagoon showing growth of Caspian lotus (Nelumbo caspicum) and mats of Azolla filiculoides fern.
- 1 Fishery
- 2 Geography
- 2.1 Islands
- 2.2 Tributaries
- 3 References
- 4 External links
Prior to 1950 the Anzali Lagoon provided about 70% of the commercial fish taken in Gilan Province, with catches of over 5,000 tons annually. Commercial fishing was done during the spring and autumn spawning cycles when the kutum, pike-perch and bream, would enter the lagoon from the Caspian. However, a number of factors acted against the continuation of the fishery and by the time commercial fishing ceased in 1960 annual catches were less than 100 tons.
Heavy siltation from increased upstream irrigation had resulted in the shrinkage and shallowing of the lagoon, increased pollution of the source waters and eutrophication due to an increased nutrient load contributed to the destruction of the fishery. More recently the surface of the lagoon has become gradually overgrown with aquatic macrophytes, primarily the non-native water-fern, Azolla filiculoides, and this has caused increased eutrophication, creating large areas of the lagoon where there is insufficient dissolved oxygen for fish to survive. Geography