Species and populations are probably the two most commonly used ecology terms, but they are often difficult concepts to grasp. Throughout this chapter, they will be discussed in detail, expanding on the definitions from previous chapters and explaining why there are no universally acceptable definitions.
Jefferson County, Arkansas is a county located in the U.S. state of Arkansas in the area known as the Arkansas Delta, that extends west of the Mississippi River. As of the 2010 census, the population was 77,435. Its county seat and largest city is Pine Bluff. Jefferson County is Arkansas's 21st county, formed on November 2, 1829, from portions of Arkansas and Pulaski counties, and named for Thomas Jefferson, third President of the United States.
Benton County, Arkansas (AR) County population in 2014: 242,321 (75% urban, 25% rural); it was 153,406 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 41,797. County owner-occupied free and clear houses and condos in 2010: 14,182.