Eliot, John. L. “Polar Bears: Stalkers of the High Artic.” National Geographic 193.1 (Jan. 1998): 52-71. “Evolution of Polar Bears.” University of Maryland, Department of Geology Site. 17 April 2003 “Field Guide: Polar Bear.” Canadian Wildlife 8.4 (Fall 2002): 10. Milius, Susan.
Wolves are a natural mean of controlling the number of deer, elk, and other large game in an environment. The larger populations of herbivores are a problem for farmers and ranchers. The herd's winter grounds could be the same ranchers use for their cattle. In 1983 the case of Allen Nelson, a rancher in Montana, came to the attention of the Forest Service. Nelson owned land about twenty miles north of Yellowstone National Park.
This picture below exemplifies how the polar bears do this acti... ... middle of paper ... ... (2009). Polar Bear (Ursus maritimus) Life History and Population Dynamics in a Changing Climate. Arctic, 62(4), 491-494. Rode, K. D., Regehr, E. V., Douglas, D. C., Durner, G., Derocher, A. E., Thiemann, G. W., & Budge, S. M. (2014). Variation in the response of an arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations.
Other areas inhabited by polar bears include Alas... ... middle of paper ... ...t of Biological Sciences with the University of Alberta. He has studied polar bears in the Canadian Arctic for over 40 years. His studies have linked the loss of sea ice due to climate change to the decline of the polar bear population. * Other readings of interest about polar bears: - Susan McGrath, July - 2011, National Geographic, "On Thin Ice" http://ngm.nationalgeographic.com/2011/07/polar-bears/mcgrath-text?rptregcta=reg_free_np&rptregcampa... - Ian Stirling, 2011, "Polar Bears, The Natural History of a Threatened Species" - Pagano, A. M., G. M. Durner, S. C. Amstrup, K. S. Simac, and G. S. York. 2012.
Native Rocky Mountain Wolves v. Introduced Canadian Gray Wolves. Black Bear Blog. Retrieved December 15, 2013, from http://www.skinnymoose.com/bbb/2011/01/21/native-rocky-mountain-wolves-v-introduced-canadian-gray-wolves/ Noecker, R. J. (1997, August 1). CRS Report: 97-747 - The Reintroduction of Wolves - NLE.
Recent genetic studies ha... ... middle of paper ... .... Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 1999. Canadian S pecies at Risk: April 1999. Committee on the Status of Endangered Wildlife in Canada, Ottawa, Ontario, Canada. 17 pp.
Return of the Wolf to Yellowstone. Henry Holt and Company. 1997. pgs 41-42. Phillips, Michael K., Smith, Douglas W. The Wolves of Yellowstone. Voyage Press, Inc. 1996, pgs 25-30.
National Review. March 20, 1995: pp 28, 29. Sneed, Paul G. “The feasibility of Gray Wolf Reintroduction to the Grand Canyon Ecoregion”. Endangered Species Update. July-August 2001. v18 i4.
Polar bears and climate change. Retrieved from http://www.defenders.org/polar-bear/climate-change Works Cited National wildlife federation—global warming and polar bears—2014--http://www.nwf.org/Wildlife/Threats-to-Wildlife/Global-Warming/Effects-on-Wildlife-and-Habitat/Polar-Bears.aspx Siegal, K. (2014). One critical reason to cut global warming pollution now: The amazing polar bear. Retrieved from http://www.huffingtonpost.com/kassie-siegel/polar-bears-climate_b_1095121.html WWF. (N.D.).
Given the current status of environmental issues and oil and gas businesses steadily moving towards the homes of polar bears. There is plentiful reason to stabilize the environment, not only the environment but regulating which type of businesses should be allowed. “On the bases of projected loses of their essential sea-ice habitats, a United States Geological Survey research team concluded in 20... ... middle of paper ... ...ghly consequences. Overall, the stop of putting these endangered species out of risk is up to us, and the choices we make because the polar bears are the ones that have to deal with the consequences. Make your choice on creating a better life and save a bear!