Producethanks to wind turbines, it limits the of . But is it really so ” green “ only that ? Researchers keep asking the question. In Germany, in particular, where many wind turbines have recently been installed. And where the counts seem to show that each year, about ten bats die for each wind turbine in operation.
A dozen bats, it is not much, one could oppose. Certainly. But multiplied by the ever-increasing number of wind turbines installed – some 30,000 for the time being – it starts to count. Especially today (Germany) argue that the disappearance of these has potentially significant consequences for the rest of the .
Wind turbines shut down
To reach this conclusion, the researchers studied the stomach contents of noctule specimens – Nyctalus noctulaabig-eared – killed by wind turbines. Gold 20% of of – like the weevil – that the hunters had eaten shortly before are considered harmful to the and forestry. Scientists conclude that the loss of bats disrupts existing. So as to potentially increase the number of pests. And even make you want to resort to chemical control.
“Further scientific work is neededconcedes Christian Voigt, head of the Evolutionary Ecology department at the Leibniz Institute for Zoo and Wildlife Researchin a . In the meantime, to preserve bats and their functional role in their habitats, we are asking for a mandatory shutdown of wind turbines during periods of high activity of these . » This is already the case for the most recently installed wind turbines. But 75% of the fleet is still running continuously.
Green energy: wind power does not protect biodiversity
Wind power is part of the production of renewable energy and as such, contributes to the protection of the environment. Really ? Wind turbines are the cause of the death of many birds and bats every year, and the recent death of six golden eagles in the United States is causing debate.
Article by Bruno Scala published on 08/17/2011
For a long time, theare accused of being harmful to birds and bats, which collide with the gigantic blades whose length can now reach 70 meters.
Numerous counting campaigns, in Canada, France and Belgium in particular, have made it possible to decide on the had estimated between 0 and 60 the number of victims per wind turbine and per year). The conclusion is clear: the supposed to contribute to the , in reality undermines the maintenance of biodiversity. Bad news for this booming industry.of the problem (the
For the supporters of wind power, who do not seem to dispute the figures, the problem is not that serious: the number ofby wind turbines is much less important than that of birds victimized by towers skyscrapers, lines to , etc. But that these humans do not pride themselves on wanting to protect the environment…
The wind power has lead in the wing
Indeed, the United States is not spared by this problem. According to thean organization of every megawatt of wind power kills 14 birds per year, for a total of approximately 440,000 victims each year.
This past year, six golden eagles fell victim to the hugeof the Pine Tree Park, which line the floor of the of Mojane, a hundred kilometers from Los Angeles in California. And in the United States, golden eagles are protected by two laws (protective acts).
The case could well thwart the plans of the American megalopolis which had set the rate of electricity supply through wind energy at 35% by 2020. According to Jerome Ford, director of the program on the migration of birds at the FWS, the goal is to find a way to produce renewable energy while respecting theand more particularly the one that is in danger. Placing wind farms out of migration flows is one solution, but environmentalists say it could lead to a which is also harmful for the animal populations concerned.
Bats also under threat
Moreover, birds are not the only victims of wind turbines. Thealso suffer from this . If it is easier for bats to avoid the blades, since they navigate through the and can therefore locate the blades at night (unlike birds), it is on the other hand impossible for them to anticipate the strong differences in caused by the passage of the blades, the ends of which spin at close to 300 km/h. This pressure difference causes tissue damage, symptomatic of what is called a .
A 2008 study, published in the journal highlighted the wind turbines on bats. All individuals whose had been examined showed lesions, suggesting that the bats had suffered a . Dark episode for green energies.