http://www.nature.com/news/2010/100827/full/news.2010.437.html
Cold empties Bolivian rivers of fish
Antarctic cold snap kills millions of aquatic animals in the Amazon.
Anna Petherick
With high Andean peaks and a humid tropical forest, Bolivia is a country of ecological extremes. But during the Southern Hemisphere's recent winter, unusually low temperatures in part of the country's tropical region hit freshwater species hard, killing an estimated 6 million fish and thousands of alligators, turtles and river dolphins.
Scientists who have visited the affected rivers say the event is the biggest ecological disaster Bolivia has known, and, as an example of a sudden climatic change wreaking havoc on wildlife, it is unprecedented in recorded history...
