Chapter 33

Chapter 33 - Chapter 33 1. Compare clumped, uniform, and...

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Chapter 33 1. Compare clumped, uniform, and random distribution patterns. CLUMPED : individuals aggregate in patches (fish, humans) UNIFORM : individuals are evenly spaced (penguins) RANDOM : the position of each individual is independent of the others (forests) 2. Identify factors that increase and decrease populations. Increase Population: o Immigration o arrival of new residents from other populations o Births o Offspring of original population Decrease Population: o Emigration o Population members permanently move to different population o Deaths o Loss of individuals within the original population 3. Define biotic potential, limiting factor, and carrying capacity. Biotic potential is the highest per capita rate of increase for a population o Factors that influence biotic potential: Average number of offspring per reproduction Chances of survival until age of reproduction Age at first reproduction How often each individual reproduces o In nature, biotic potential is rarely reached, Limiting Factors have large effect on this Limiting Factor is any essential resource that is in short supply (ex. Food, water) Carrying Capacity is the number of individuals of a species that a particular environment
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can support 4. Compare J-shaped and S-shaped growth curves and give examples of organisms that display each type. J-shaped Curve o Lag phase : Growth is small, population is small o Exponential growth phase : Growth is accelerating, population exhibiting its biotic potential S-shaped Curve o Lag phase : Growth is small. population is small o Exponential growth phase : Growth is accelerating, and the population is exhibiting its biotic potential o Deceleration phase : The rate of population growth slows down o Stable equilibrium phase : Little if any growth takes place because births and deaths are about equal 5. Compare Type I, II, III survivorship curves and give examples of organisms that display each type. Type I most individuals survive until old age Example : humans Type II decreases consistently over time Example : songbirds) Type III most individuals die early Example : oysters 6. Compare population growth and age structure among more developed and less developed countries. Developed
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Chapter 33 - Chapter 33 1. Compare clumped, uniform, and...

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