Chapter Learning Objectives Chapter 26: Population Growth and Regulation • Define ecology and population o Ecology- the study of interrelationships among living things and their nonliving environment o Population- members of a particular species within an ecosystem 26.1 How does population size change? • Distinguish between biotic potential and environmental resistance o Biotic Potential- maximal growth rate given ideal conditions; it produces exponential growth if not restrained o Environmental resistance- factors that limit population growth such as food availability, space, access to mates, and environmental factors • Describe the variables involved in the exponential model of population growth o Population growth= biotic potential – environmental resistance o Population change=( births- deaths) + (immigrants-emigrants) • Draw the growth curve of a population before it encounters significant environmental resistance. What is the name of this type of growth and what are its distinguishing characteristics? 26.2 How is population growth regulated?
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