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Chapter 52

Chapter 52 – Population Ecology.docx

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Department
Biology
Course
BIOLOGY 1M03
Professor
Jurek Kolasa
Semester
Fall

Description
Chapter 52 – Population Ecology  • Population ecology – the study of how and why the number of individuals in a population change  over time • Populations grow due to birth and immigration, and decline due to death and emigration  • Predicting future state of a population: o How many individuals of each age are alive o How likely individuals of different ages are to survive the next year  o How many offspring are produces by females of different ages (fecundity) o How many individuals of different ages are immigrating or emigrating  • Life table – summarizes the probability that an individual will survive and reproduce in any given  time interval over the course of its lifetime  • Survivorship – proportion of offspring produced that survive on average to a particular age o Type I – survivorship throughout life is high (humans) o Type II – constant mortality through life (birds) o Type III – extremely high death rates at young age (plants) • Fecundity – the number of female offspring produced by each female in a population  • Fitness trade­offs – when an organism’s resources are limited, they must
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