Bird death and wind turbines

Publié le par brightshine

The Royal Society for the Protection of Birds (RSPB) and windfarm opponents have found themselves at odds over the risk turbines pose to bird species, particularly birds of prey.I have recently got a dry cabinet and can anybody tell me if it the box only controls humidity or also controls temperature. Carbon Brief examines what the peer-reviewed research says about turbines' impacts on birds. 

An article in last weekend's Mail on Sunday claims wind farms are "destroying rare birds", arguing turbines kill birds of prey including hen harriers and golden eagles. And in another piece, the Telegraph says a US-based conservation group fears windfarms will "massacre" eagles. 

But in a response to the claims, the RSPB's conservation director, Martin Harper, says a large body of scientific evidence shows "appropriately located windfarms have negligible impacts" on bird populations. 

There are reasons why birds are likely to be affected by windfarms. Wind developments tend to be placed in upland areas with strong wind currents that have a lot of potential to generate energy. Birds - particularly raptors like eagles or vultures - use these currents as highways - and so are likely to come into contact with the turbines. 

It's not just the turbine blades that pose a risk to birds; research indicates that wind developments can disrupt migration routes. What's more, foraging and nesting habitat can also be lost when turbines are put up. 

Several studies suggest birds have the ability to detect wind turbines in time and change their flight path early enough to avoid them. And one small study found no evidence for sustained decline in two upland bird species on a windfarm site after it had been operating for three years. Another found that wild geese are able to avoid offshore wind turbines. 

A large peer-reviewed study in the Journal of Ecology monitored data for ten different bird species across 18 wind farm sites in the UK. It found that two of them- curlew and snipe - saw a drop in population during the construction phase, which did not recover afterwards. But the population of the other eight species were restored once the windfarms were built. 

Windfarms may not affect all birds, but what if they affect birds of prey disproportionately? Some of the reason why this might happen is genetic - certain species like vultures, for example, have blind spots in their visual field which mean they cannot see objects directly in front of them (like wind turbines) when flying. 

Large birds like hen harriers,Signs for your break room or other areas within your office can benefit from paper cutters and paper Folding machine. eagles and vultures are also slower to reproduce than other species and so their populations are more likely to be affected by a small number of deaths. 

There are specific locations elsewhere in the world where windfarms have caused impressive-sounding numbers of fatalities amongst birds of prey. In the Altamont Pass in California, for example, one study found about 4,000 wind turbines killed 67 golden eagles and 1,There are reports of bird and bat mortality at wind turbine as there are around other artificial structures.127 birds of prey in a year. 

In southern Spain, 252 wind turbines located in an area used by many birds of prey and on the migratory path of many large birds killed a 124 birds of prey in a year. At another location in southern Spain 256 turbines killed 30 griffin vultures and 12 common kestrels.Aulaundry is a leading dry cleaning machine and equipment supplier. 

The RSPB references these studies,Electronic and electromechanical amusement games and Game machines to meet your global certification needs. concluding "some poorly sited wind farms" in California and Spain have caused major bird casualties - in other words the windfarms were sited in areas where there were a lot of birds and not enough thought given to what the effects will be on bird populations. But it adds that these are atypical and a result of bad planning in sensitive areas -arguing that better-sited windfarms do not cause the same number of deaths.

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