Introduction to Populations
Monarch butterflies.
Courtesy of Bugwood.org\Harry O. Yates III.
What are the characteristics that define populations? What causes populations to grow or decline? A population is a group of individuals of the same species living within a designated area at one time. Three important structural aspects of a population are: dispersion pattern, population density and growth rate.
Companion slide set to the video, "Introduction to Populations."