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Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Rules and Regulations Oregcm
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Figure I-Approximate current range of the Sierra Nevada DPS of Sierra Nevada red fox. The range follows the Sierra crest the north-to-south ridgeline of the Sierra Nevada mountain range, and includes known sighting locations and nearby high-quality habitat Cleve et al. 2011, entire; Eyes 2016, attachments; Hiatt 2017, attachment; Quinn 2018a, attachments; Quinn 2018a, attachments; Stermer 2018, p. 1.
Sierra Nevada DPS sightings have consistently occurred in subalpine habitat and high-elevation conifer areas at elevations ranging from 2,469 to 3,538
meters m 8,100 to 11,608 feet ft Sacks et al. 2015, pp. 3, 11;
Dunkelberger 2020, p. 3. Four detections out of more than 750 scat or hair samples that have been obtained since 2011 have occurred at lower elevations from 6,805 to 7,059 ft 2,074
to 2,152 m, but these outliers appear
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to be from three individuals that were in the process of dispersing Quinn 2020, p. 1. In the Sonora Pass area used by the Sierra Nevada DPS, subalpine habitat is characterized by a mosaic of high-elevation meadows, rocky areas, scrub vegetation, and woodlands largely mountain hemlock Tsuga mertensiana, whitebark pine Pinus albicaulus, and lodgepole pine Pinus contorta Fites-Kaufman et al. 2007, p.
475; Sacks et al. 2015, p. 11; Quinn
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2017, p. 3. Snow cover is typically heavy, and the growing season lasts only 7 to 9 weeks Verner and Purcell 1988, p. 3. Forested areas are typically relatively open and patchy Verner and Purcell 1988, p. 1; Lowden 2015, p. 1, and trees may be stunted and bent krumholtzed by the wind and low temperatures Verner and Purcell 1988, p. 3; Sacks et al. 2015, p. 11.

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