BOULDER, Colo., Nov. 8 (UPI) -- Wind turbines killed at least 600,000 -- and possibly as many as 900,000 -- bats in the United States in 2012, researchers say.
Writing in the journal BioScience, the researchers said they used sophisticated statistical techniques to infer the probable number of bat deaths at wind energy facilities from the number of dead bats found at 21 locations.
Bats, which play an important role in the ecosystem as insect-eaters, are killed at wind turbines not only by collisions with moving turbine blades but also by the trauma resulting from sudden changes in air pressure that occur near a fast-moving blade, the study said.
Study author Mark Hayes of the University of Colorado notes that 600,000 is a conservative estimate -- the true number could be 50 percent higher than that -- and some areas of the country might experience much higher bat fatality rates at wind energy facilities than others.
Hayes said the Appalachian Mountains have the highest estimated fatality rates in his analysis.
With bats already under stress because of climate change and disease, in particular white-nose syndrome, the estimate of wind turbine deaths is worrisome, he said -- especially as bat populations grow only very slowly, with most species producing only one young per year.
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Apr 14, 2021 1:41:25 GMT -6
Susan George: Thank You for your support!
Dec 21, 2020 17:18:51 GMT -6
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Nov 29, 2020 17:15:41 GMT -6
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Nov 13, 2019 16:18:54 GMT -6
ConGM: Please direct me to the full article by Susan George. Or email to email@example.com.The provided link is broken. I'd like to read it in preperation for a course. Much appreciated.
Nov 13, 2017 15:19:23 GMT -6
ace comando: Well, it took me several days and a lot of code writing to sift through the millions of achieved pages on the Wayback Machine achieves. Was about to give up when a colleague gave me mining script to look at all archived pages whether displayed or not. And
Feb 24, 2017 19:44:10 GMT -6
unlawflcombatnt: I've now changed the colors on the board to something more readable. At least now readers can find the sign-in tab.
Jul 6, 2014 22:58:23 GMT -6
unlawflcombatnt: OldUser-the sign-in area is in the dark area immediately under the red section that says Economic Populist Forum. It's almost impossible to see, unless you know where to look. This was ProBoards idea, not mine.
Jun 12, 2014 11:52:53 GMT -6
OldUser: There's no link on here to sign on or login. Where'd it go?
May 29, 2014 8:44:44 GMT -6
jeffolie: One might short a bull ETF to gain the decay but this requires a margin position subject to changes imposed by the exchanges & brokers
Oct 26, 2013 13:26:07 GMT -6
jeffolie: Holding a stop loss in these algo dominated markets almost always means the algos will hit your stops
Oct 26, 2013 13:20:09 GMT -6
jeffolie: Even so, these leveraged ETFs do not create margin calls nor expiration dates thus allowing one to hold indefinitely
Oct 26, 2013 13:17:52 GMT -6
jeffolie: Yes, the ETF features fading/leveraged decay because the futures and/or options used decay plus the administrative costs rise the decay, declining value ... I accept this as a cost and feature of all ETFs that purchase futures/options to maintain price
Oct 26, 2013 13:15:38 GMT -6
mimzy: jeffolie ~ I've been reading/lurking you for a year or three now and was wondering if your could you explain how you overcome quantum fading/leveraged decay in your ETF short position of the DJIA?
Oct 25, 2013 20:46:26 GMT -6