Question: What university, located in Oxford, Mississippi, replaced its old mascot, Colonel Reb, by the new anthropormorphic mascot Rebel The Black Bear?

Context paragraphs:
Cinnamon bear: The cinnamon bear ("Ursus americanus cinnamomum") is both a color phase and subspecies of the American black bear, native to central and western areas of the United States and Canada.  Established populations are found in Colorado, New Mexico, Utah, Idaho, Montana, Washington, Manitoba Minnesota, Wisconsin, Wyoming, California, Alberta, and British Columbia.  They also have been seen in Pennsylvania and New York.  The most striking difference between a cinnamon bear and any other black bear is its brown or red-brown fur, reminiscent of cinnamon.  The subspecies was given the designation because the lighter color phase is more common there than in other areas.

Black Bear Resort: Black Bear Resort is located in the South Eastern Corner of Idaho in Bear Lake County, about 140 mi north of Salt Lake City, UT and about 136 mi south of Jackson Hole, WY.  The project originally began in 2002 with an initial plan to develop land adjacent to the Caribou Targhee forest service boundary into 20 acre parcels with individual wells.  In 2004 the Idaho Department of Water Resources adopted a water mitigation plan allowing the transfer of water rights from one property in a county to another.  This single act provided the opportunity to secure ample water for a high density housing project like Black Bear Resort.  However, on January 31, 2011, the Idaho Department of Water Resources denied Black Bear Resort's application for water use (see reference in "History" section, below).

Rebel Black Bear: Rebel, The Black Bear is the mascot of the Ole Miss Rebels, the collegiate athletic teams of the University of Mississippi.  The anthropomorphic black bear replaced Colonel Reb as the official mascot in 2010.

Hey Reb!: Hey Reb!  is the mascot for the UNLV Rebels, the athletic teams of the University of Nevada, Las Vegas in Paradise, Nevada, USA.  He performs live at all UNLV athletic events.  The campus community is divided over the contention that the mascot, looking like a confederate soldier, appears to be a symbol of racism.  The mascot was first created in 1983 to depict the embodiment of an independent, rebel spirit at UNLV athletic events.  As race discrimination issues dominated national events, community members voiced concerns that Beauregard glorified the Confederacy and had little to do with the community's history.  In the early 1970s, students voted to banish Beauregard but retained the Rebels name (rejecting alternatives such as Big Horn Rams, Nuggets, A-Bombs, and Sand Burners).  Replacing Beau was a musket-toting Minuteman, but that Revolutionary War figure didn't resonate in the West either.  So UNLV essentially went without an official mascot.

Florida black bear: The Florida black bear ("Ursus americanus floridanus") is a subspecies of the American black bear that has historically ranged throughout most of Florida and southern portions of Alabama, Georgia, and Mississippi.  The large black-furred bears live mainly in forested areas and have seen recent habitat reduction throughout the state.

Touchdown (mascot): Touchdown, or the "Big Red Bear", is the unofficial mascot of Cornell University.  The first mascot was a black bear introduced in 1915 by the Cornell University Athletic Association.  Three more live bears over the course of approximately two decades also made appearances at Cornell until the live bear was replaced by costumed students some years later.  Touchdown appears on the logo for Cornell Athletics.

Plantation High School: Plantation High School (commonly referred to as PHS) is a high school located in Plantation, Florida.  The school serves 2,301 students in grades 9 through 12, and is a part of the Broward County Public Schools district.  It was originally located on the Fort Lauderdale airport grounds Naval Air Station Fort Lauderdale base, This was used as a temporary location until the new building was ready to open at its present location.  Students at Plantation High are called "Colonels".  The original school logo was a graphic of a traditional Southern colonel—the equivalent of Colonel Reb, mascot of the University of Mississippi.  In the early 1990s, amidst concerns of racial insensitivity, the logo was changed to a large red letter "C," similar to the Chicago Bears logo.

Black Bear Sports Network: Black Bear Sports Network is the radio and television name for University of Maine sports.  The radio affiliates broadcast football, men's and women's basketball, men's ice hockey and select baseball and softball games.  The current network formed in the summer of 2007 when Learfield Sports took over the marketing for the Maine Black Bears.  Previous to this the radio network was known as "The Sports Zone Black Bear Network" and was heard on Bangor, Maine ESPN Radio affiliate WZON, at times including WLOB and WEGP.

Colonel Reb: Colonel Reb was the mascot of Ole Miss Rebels, the collegiate athletic teams of the University of Mississippi ("Ole Miss") in Oxford, Mississippi.  Designed in 1936, the Colonel served as the teams' official sideline mascot from 1979 until 2003.  The university replaced him in 2010 with a new on-field mascot, the Black Bear.

Louisiana black bear: The Louisiana black bear ("Ursus americanus luteolus"), one of 16 subspecies of the American black bear, is found in parts of Louisiana, mainly along the Mississippi River Valley and the Atchafalaya River Basin.  It was classified as 'threatened' under the U.S. Endangered Species Act from 1992-2016.

Supporting paragraphs: Rebel Black Bear Colonel Reb
Answer: University of Mississippi