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WIND DAILY
Marine life thrives around offshore wind farms
by Brooks Hays
Edinburgh, Scotland (UPI) Jul 21, 2013


disclaimer: image is for illustration purposes only

Like it does around so many other manmade structures, (even floating heaps of trash), marine life thrives on and about the structures that comprise offshore wind farms.

Fish, crustaceans and other aquatic life make their homes on and near the giant columns that stretch from the sea's surface to the ocean floor.

Naturally, larger sea creatures have flocked to these structures in search of prey, and new research shows that some of the most frequent visitors are seals.

Anecdotally, scientists have known of this interesting yet perfectly logical phenomenon, but now there's hard evidence.

"As far as we know this is the first study that's shown marine mammals feeding at wind farms," explained Deborah Russell, a researcher from the University of St. Andrews in Scotland.

As detailed in the latest edition of the journal Current Biology, marine biologists tracking a group of 11 seals found the pack routinely visited two wind farms, one off the coast of Germany and the other near the southeastern coast of England. When visiting, the seals' movements showed they traveled from turbine to turbine, looking for vulnerable prey that had made a home of the artificial reefs.

"I was shocked when I first saw the stunning grid pattern of a seal track around Sheringham Shoal," she said of the offshore wind farm in Norfolk. "You could see that the seal appeared to travel in straight lines between turbines, as if he was checking them out for potential prey and then stopping to forage at certain ones.

While offshore wind farms have struggled to establish themselves in the U.S. -- where they are routinely fought by coastal homeowners who don't want their view ruined -- Europe has led the way in terms of renewable energy projects along its shores.

For humans, these farms mean cheaper, environmentally friendly energy. But, as Russell and her research colleagues found out, for seals it means additional hunting grounds.

"There are some issues of course with having animals more in the vicinity of anthropogenic activities, because you've got maintenance vessels in the area, you've got some noise from the wind turbines, so that could be negative," explained Russell. "But on the other hand it's obviously quite successful in terms of foraging for these individuals, because they're choosing to go back to these anthropogenic reefs time after time."

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