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HOW POPULATIONS GROW

In this chapter on population dynamics, we explore critical characteristics of populations, including geographic distribution, density, and growth rates. We examine how population size is influenced by birth and death rates, alongside immigration and emigration. The chapter defines and contrasts exponential growth, occurring under ideal conditions, with logistic growth, which accounts for environmental limits through carrying capacity. Understanding these principles is essential for studying the interrelationships among organisms and their biotic and abiotic environments.

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HOW POPULATIONS GROW

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  1. HOW POPULATIONS GROW CHAPTER5 SECTION 1 SC B-6: The student will demonstrate understanding of the interrelationships among different organisms & the biotic & abiotic components of their environment

  2. 3 Important Populastion Characteristics Geographic Distribution Density Growth Rate

  3. Geographic Distribution of Opossum

  4. Population Density • # of individuals / unit area • varies depending on species and ecosystem

  5. 3 Factors Affect Population Size # of births # of deaths #s that immigrate & emigrate

  6. Exponential Growth occurs when the individuals in a population reproduce at a constant rate *under ideal conditions with unlimited resources, a population will grow exponentially see J-shaped curve

  7. LOGISTIC GROWTH • growth pattern in which a population’s growth rate slows or stops following a period of exponential growth • carrying capacity: largest # of individuals of a population that a given environment can support

  8. Carrying Capacity Graph

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