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1

Chen, Hsiang-Ling, Erin E. Posthumus, and John L. Koprowski. "Potential of Small Culverts as Wildlife Passages on Forest Roads." Sustainability 13, no. 13 (2021): 7224. http://dx.doi.org/10.3390/su13137224.

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Roads and traffic can cause animal mortality. Specifically, roads serve as barriers by impeding animal movement, resulting in demographic and genetic consequences. Drainage structures, such as culverts, can provide linkages between habitat patches. However, the potential of small culverts with diameters of <60 cm (e.g., wildlife passages that facilitate movement on forest roads) are relatively unknown. In this study, we used trail cameras to monitor the use of 14 small culverts, by mammals, along forest roads on Mt. Graham, home of the critically endangered Mt. Graham red squirrels (Tamiasc
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2

Warshall, Peter. "The Biopolitics of the Mt. Graham Red Squirrel (Tamiasciuris hudsonicus grahamensis)." Conservation Biology 8, no. 4 (1994): 977–88. http://dx.doi.org/10.1046/j.1523-1739.1994.08040977.x.

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3

Robold, Richard B., and Falk Huettmann. "High-resolution prediction of American red squirrel in Interior Alaska: a role model for conservation using open access data, machine learning, GIS and LIDAR." PeerJ 9 (September 14, 2021): e11830. http://dx.doi.org/10.7717/peerj.11830.

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American red squirrels (Tamiasciurus hudsonicus) are small mammals that are abundantly distributed throughout North America. Urbanization in the Anthropocene is now a global process, and squirrels live in affected landscapes. This leads to squirrels adjusting to human developments. Not much is known about the distribution of squirrels and squirrel middens near humans, especially not in the subarctic and sub-urbanized regions. Although this species is hunted, there are no real publicly available distribution and abundance estimates nor management plans and bag limits for squirrels in Alaska or
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4

Watson, Fred. "How Green is the Universe?" Pacific Conservation Biology 17, no. 2 (2011): 89. http://dx.doi.org/10.1071/pc110089.

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IT is not often that astronomers get sucked into bio-politics. But the 1980s saw the start of a bitter feud that still rumbles around today — at least among some of America’s conspiracy theorists. At its heart was a diminutive hero, a 200-g Mount Graham Red Squirrel Tamiasciurus hudsonicus grahamensis unique to the tree-covered Pinaleño Mountains, a small isolated mountain range in southern Arizona, of which Mt Graham is the highest peak. Thought to be extinct in the 1950s, this little survivor reappeared in small numbers on the 3 200 m mountain during the 1970s, and, in 1987, with a populatio
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5

Schauffert, Carol A., John L. Koprowski, Vicki L. Greer, Marit I. Alanen, Kelly A. Hutton, and Paul J. Young. "Interactions between Predators and Mt. Graham Red Squirrels (Tamiasciurus hudsonicus grahamensis)." Southwestern Naturalist 47, no. 3 (2002): 498. http://dx.doi.org/10.2307/3672515.

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6

Pereira Mendes, Calebe, and John Koprowski. "Does caching strategy vary with microclimate in endangered Mt. Graham red squirrels?" PLOS ONE 14, no. 11 (2019): e0224947. http://dx.doi.org/10.1371/journal.pone.0224947.

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7

Koprowski, John L. "ANNUAL CYCLES IN BODY MASS AND REPRODUCTION OF ENDANGERED MT. GRAHAM RED SQUIRRELS." Journal of Mammalogy 86, no. 2 (2005): 309–13. http://dx.doi.org/10.1644/bwg-232.1.

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8

Koprowski, JL, SRB King, and MJ Merrick. "Expanded home ranges in a peripheral population: space use by endangered Mt. Graham red squirrels." Endangered Species Research 4 (January 18, 2008): 227–32. http://dx.doi.org/10.3354/esr00026.

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9

Rushton, S. P., D. J. A. Wood, P. W. W. Lurz, and J. L. Koprowski. "Modelling the population dynamics of the Mt. Graham red squirrel: Can we predict its future in a changing environment with multiple threats?" Biological Conservation 131, no. 1 (2006): 121–31. http://dx.doi.org/10.1016/j.biocon.2006.02.010.

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10

Koprowski, John L., Marit I. Alanen, and Ann M. Lynch. "Nowhere to run and nowhere to hide: Response of endemic Mt. Graham red squirrels to catastrophic forest damage." Biological Conservation 126, no. 4 (2005): 491–98. http://dx.doi.org/10.1016/j.biocon.2005.06.028.

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11

Smith, Andrew A., and R. William Mannan. "Distinguishing Characteristics of Mount Graham Red Squirrel Midden Sites." Journal of Wildlife Management 58, no. 3 (1994): 437. http://dx.doi.org/10.2307/3809314.

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12

Zugmeyer, Claire A., and John L. Koprowski. "AVIAN NESTLING PREDATION BY ENDANGERED MOUNT GRAHAM RED SQUIRREL." Southwestern Naturalist 52, no. 1 (2007): 155–57. http://dx.doi.org/10.1894/0038-4909(2007)52[155:anpbem]2.0.co;2.

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13

WOOD, DAVID J. A., SAM DRAKE, STEVE P. RUSHTON, DOUG RAUTENKRANZ, PETER W. W. LURZ, and JOHN L. KOPROWSKI. "Fine-Scale Analysis of Mount Graham Red Squirrel Habitat Following Disturbance." Journal of Wildlife Management 71, no. 7 (2007): 2357. http://dx.doi.org/10.2193/2006-511.

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14

MERRICK, MELISSA J., SADIE R. BERTELSEN, and JOHN L. KOPROWSKI. "Characteristics of Mount Graham Red Squirrel Nest Sites in a Mixed Conifer Forest." Journal of Wildlife Management 71, no. 6 (2007): 1958–63. http://dx.doi.org/10.2193/2006-260.

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15

Merrick, Melissa J., R. Nathan Gwinn, Rebecca L. Minor, et al. "Endangered Mount Graham Red Squirrel (Tamiasciurus hudsonicus grahamensis) Uses Nest Following Lightning Strike." Southwestern Naturalist 55, no. 1 (2010): 123–24. http://dx.doi.org/10.1894/clg-18.1.

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16

Hatten, James R. "Mapping and monitoring Mount Graham red squirrel habitat with Lidar and Landsat imagery." Ecological Modelling 289 (October 2014): 106–23. http://dx.doi.org/10.1016/j.ecolmodel.2014.07.004.

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17

Blount, Seafha J., and John L. Koprowski. "Response of the Mount Graham Red Squirrel (Tamiasciurus hudsonicus grahamensis) to Postfire Conditions." Southwestern Naturalist 57, no. 1 (2012): 8–15. http://dx.doi.org/10.1894/0038-4909-57.1.8.

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18

Elkins, Eric K., Daniel B. Tyers, Michael R. Frisina, Joao L. Rossi, and Bok Sowell. "Red Squirrel (Tamiasciurus hudsonicus) Midden Site Selection and Conifer Species Composition." Environmental Management and Sustainable Development 7, no. 2 (2018): 15. http://dx.doi.org/10.5296/emsd.v7i2.12674.

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Reductions in whitebark pine (Pinus albicaulis) due to blister rust (Cronartium ribicola) and mountain pine beetle (Dendroctonus ponderosae) have prompted some forest managers to consider selective thinning and prescribed fire to reduce competition of whitebark pine with other conifer species. Whitebark pine is an important food source for grizzly bears (Ursus arctos horribilis) in the Greater Yellowstone Ecosystem, but most of the seeds are obtained by raiding red squirrel (Tamiasciurus hudsonicus) middens. Therefore, it is important to understand which attributes maximize red squirrel midden
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19

Fitak, Robert R., John L. Koprowski, and Melanie Culver. "Severe reduction in genetic variation in a montane isolate: the endangered Mount Graham red squirrel (Tamiasciurus hudsonicus grahamensis)." Conservation Genetics 14, no. 6 (2013): 1233–41. http://dx.doi.org/10.1007/s10592-013-0511-x.

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20

Merrick, Melissa J., and John L. Koprowski. "Evidence of natal habitat preference induction within one habitat type." Proceedings of the Royal Society B: Biological Sciences 283, no. 1842 (2016): 20162106. http://dx.doi.org/10.1098/rspb.2016.2106.

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Natal habitat preference induction (NHPI) is a mechanism for habitat selection by individuals during natal dispersal. NHPI occurs in wild animal populations, and evidence suggests it may be a common, although little studied, mechanism for post-dispersal habitat selection. Most tests of NHPI examine the influence of distinct, contrasting natal habitat types on post-dispersal habitat selection. We test the hypothesis that NHPI can occur within a single habitat type, an important consideration for habitat specialists. The Mount Graham red squirrel ( Tamiasciurus hudsonicus grahamensis ) is an end
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21

"The biopolitics of the Mt Graham red squirrel Tamiasciuris hudsonicus grahamensis." Biological Conservation 76, no. 2 (1996): 213. http://dx.doi.org/10.1016/0006-3207(96)83243-5.

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22

Conklin, Jamie L. "The Last Refuge of the Mt. Graham Red Squirrel: Ecology of Endangerment." Electronic Green Journal 1, no. 33 (2012). http://dx.doi.org/10.5070/g313312622.

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23

"The Last refuge of the Mt. Graham red squirrel: ecology of endangerment." Choice Reviews Online 47, no. 04 (2009): 47–2000. http://dx.doi.org/10.5860/choice.47-2000.

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24

"GIS-based habitat modeling using logistic multiple regression: a study of the Mt Graham red squirrel." Biological Conservation 64, no. 1 (1993): 99. http://dx.doi.org/10.1016/0006-3207(93)90421-v.

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25

Merrick, Melissa J., Marina Morandini, Vicki L. Greer, and John L. Koprowski. "Endemic Population Response to Increasingly Severe Fire: A Cascade of Endangerment for the Mt. Graham Red Squirrel." BioScience, January 6, 2021. http://dx.doi.org/10.1093/biosci/biaa153.

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Abstract Drought, past fire suppression, insect invasion, and high-severity fire represent a disturbance cascade characteristic of forests in the western United States. The result is altered forest ecosystems diminished in their function and capacity to support biodiversity. Small habitat specialists are particularly vulnerable to the impacts of disturbances because of their limited movement capacity and high site fidelity. Research suggests that small mammals suffer limited direct mortality from fire but are increasingly vulnerable to local extirpation because of secondary impacts that includ
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