Greek Authorities Cordon Off Lake After Cyanobacteria "Cocktail" Causes Bird Kill - AFP

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Authorities in northern Greece said Wednesday they had cordoned off a protected wetlands where scores of birds were found dead from suspected bacteria poisoning. "We are facing a possible crisis at Lake Koroneia... but there is no public health risk," Salonika prefect Panagiotis Psomiadis told an emergency meeting of health and environment officials.

Some 200 birds -- including flamingos, avocets, shelducks, sandpipers and terns -- were found dead over the weekend at Lake Koroneia. The wetland is listed on an international convention called Ramsar that aims to protect areas that have suffered successive environmental disasters.

Tests by Salonika's Aristotelio University showed that the birds died from a "cocktail" of cyanobacteria and other organisms that flourished because of heat and drought, Psomiadis said. "These micro-organisms pose no harm to people unless they enter the food chain," the prefect said. Bird flu was ruled out, he said.

Aristotelio biology professor Maria Moustaka told the meeting that Koroneia is an ecosystem "near death." Hunting and grazing have been prohibited around the lake some 30 kilometres (19 miles) southeast of Salonika. In 2004, thousands of birds and fish died at Koroneia from an outbreak of botulism, caused by a bacterium that develops in stagnant or polluted waters and produces a potent neurotoxin.

EDIT

http://www.terradaily.com/2007/070919141000.d345kyg1.html