Tuesday, May 22, 2007

 

Contaminated Salvador lake is mystery bird magnet

‘An artificial lake in El Salvador brimming with sewage and industrial waste is mystifying scientists by attracting thousands of migratory and sea birds.

Built in 1974 to drive El Salvador’s biggest hydroelectric project, the 33,360-acre (13,500- hectare) Cerron Grande reservoir collects some 3,800 metric tons of excrement each year from the sewage pipes, as well as factory run-off and traces of heavy metals like chromium and lead, the government estimates.

So scientists are puzzling over the fact that some 150,000 seabirds from more than 130 species have chosen to make the reservoir their home. At least 90 of the species are migratory birds arriving from as far away as Alaska.’




Leave a Reply

suggest