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Old 03-01-2009   #3 (permalink)
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M.C. Grillmeister



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Re: American Pika

Quote:
Originally Posted by Cedars View Post
To confront widespread global warming alarmist propaganda:
American Pika
...
Nuff said.
Regardless of whatever current conservation status they have, the scientific data speaks for itself and always comes before any protection.

Quote:
Global warming represents the gravest threat to the long-term survival of the American pika. In the western United States, temperatures have already increased by 1.1*2.8°C (2.0-5.0°F) during the past century (Smith et al. 2001). Beever et al. (2003) documented the extirpation of six of twenty-five pika populations in the Great Basin range of Nevada and Oregon over 55-86 years and found significant evidence that global warming has caused or contributed to these extirpations. Between 2003-2007 Beever resurveyed Great Basin pika populations and found additional population extirpations and an increased pace of population loss since the 1990s (Erik Beever, personal communication, 8/10/07). Overall, in the past century, at least 9 of 25 (36%) of documented Great Basin pika populations have been extirpated and the pika range has
shifted upslope by 900 feet. In parallel with trends in the Great Basin, the Grinnell Resurvey
Project in the Sierra Nevada Mountains of Yosemite National Park, California, detected the loss of the lowest-elevation pika population in the ~90 years between the historic Grinnell survey and modern resurvey (Moritz 2007), suggesting an upslope range shift of 500 feet. Temperatures in Yosemite National Park have increased by 3°C (5.4°C) over 100 years, more than the mean increase in California or western United States temperatures over the same period (Moritz 2007). Moritz (2007) concludes that the most likely factor underlying the range shift in the pika and other high elevation species is temperature increases.
http://www.biologicaldiversity.org/s...10-01-2007.pdf


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