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0006-3207


**8** 

*Mnemiopsis leidyi* **Invasion and Biodiversity** 

The complex history of the Caspian Sea formation has lead to a variety of different habitats. Like Australia, the Caspian Sea became isolated thousands of years ago (Plate 1). This

The Caspian Sea is the biggest enclosed body of water on Earth, having an even larger area than that of the American Great Lakes or that of Lake Victoria in East Africa. It is situated where the South-Eastern Europe meets the Asian continent, between latitudes 47.07́N and 36.33́N and longitudes 45.43́E and 54.20́E. It is approximately 1,030 km long and its width ranges from 435 km to a minimum of 196 km. It has no connection to the world's oceans and its surface level at the moment is around \_26.5 m below MSL. At this level, its total coastline is some 7,000 km in length and its surface area is 386,400 km2. The water volume of the lake

**Cas**

**pian Sea** 

isolation led to the speciation of many rare animals in particular the sturgeon.

**1. Introduction 1.1 Caspian Sea** 

is about 78,700 km3.

Plate 1. Caspian Sea area

**Changes in the Caspian Sea** 

Aboulghasem Roohi1 and Ameneh Sajjadi2

*2Meteorology Dept, Islamic Azad University Rasht* 

*1Caspian Sea Research Institute of Ecology,* 

 *Khazarabad Boolvar, Sari,* 

*Branch, Rasht, Guilan* 

 *Iran*

