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Uploaded on Thursday 01 Mar 2012 by GRID-Arendal

Origin and destination of selected species

Year: 2012 Author:
Original cartography by Philippe Rekacewicz (le Monde Diplomatique) assisted by Laura Margueritte and Cecile Marin, later updated by Riccardo Pravettoni (GRID-Arendal), Novikov, Viktor (Zoi Environment Network)
Description:
North American comb jelly (Mnemiopsis leidyi) was brought accidentally to the Caspian in the ballast water of oil tankers. A voracious feeder on zooplankton and fish larvae, it first arrived in the Black Sea in the early 1980s where it changed the whole ecosystem and contributed to the collapse of more than two dozen major fishing grounds. From there the comb jelly also invaded the Azov, Marmara and Aegean Seas and most recently the Caspian.
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Collapse of Tulka in the Caspian
Infant mortality in Eastern Azerbaijan, 2008
Annual discharge into the Caspian Sea
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A century of outflow into Kara Bogaz Gol, km3/ year