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Global environmental challenges

April 3rd, 2008

Galapagos bird brains survive wind turbines

Posted by: Alister Doyle

Galapagos wind turbine — courtesy E8 group of power generatorsThree giant wind turbines are helping the Galapagos Islands in the Pacific Ocean towards a goal of eliminating use of fossil fuels by 2015 — and no birds have been killed in a six-month pilot scheme despite worries in many nations that big blades and bird brains don’t mix.

The Galapagos are home to mocking birds, finches, petrels, blue-footed boobies, doves, albatrosses and other exotic species many of which only live on the islands. Studies of Galapagos birds helped British 19th century naturalist Charles Darwin work out his theory of evolution.

“In six months of pilot operations there have been no bird kills,” said Melinda Kimble of the U.N. Foundation, a sponsor of the $10.8 million project led by power producers including American Electric Power and also backed by Ecuador’s government.

Power producers studied birds’ flight paths and nesting habits to decide the siting of the turbines and reduce risks of collisions.

“There seems a very broad support for the project, right down to school kids,” said Kimble after attending an official dedication ceremony late last month on San Cristobal, the island with the biggest human population.

A pelican not affected by the oil spill stands on a rock as the Ecuador-registered ship “Jessica” remains aground off San Cristobal in the Galapagos Island chain, January 25, 2001. Nine days after the ship ran aground and spilled most of its cargo of diesel and bunker fuel, the spill continues to threaten animal species native only to the archipelago. GG/HBThe turbines have a generating capacity of 800 Kwh and will provide up to about 80 percent of San Cristobal’s electricity needs in windy months, halving the need for diesel fuel to power the island. The ship “Jessica,” carrying 160,000 gallons (606,000 liters) of diesel fuel and about 80,000 gallons (300,000 liters) gallons of other liquids, is seen January 21, 2001. A boat carrying fuel to Ecuador’s Galapagos Islands that ran aground four days ago is leaking oil into the ecologically sensitive waters near the famous islands, the government said Saturday. The spill has already affected animals including sea lions and pelicans and volunteers are on standby to clean up and rescue them, an ecologist said. GG

The shift to renewable energy for the islands was spurred after the oil tanker Jessica ran aground with 160,000 gallons of diesel fuel in 2001 — some oil leaked but a catastrophe was narrowly averted thanks to favourable winds and tides.

Bird lovers say that turbines from California to Denmark often kill birds.

But are the turbines a threat — or is it just a case of siting them with care?