Biology Chapter 52 Objectives

# Biology Chapter 52 Objectives - Chapter 52 Objectives 1...

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Chapter 52 Objectives 1. Density of a population is the number of individuals per unit area, or volume. Dispersion of a population is the pattern of spacing among individuals within the boundaries of the population. 2. There are many ways for ecologists to estimate the density of a population. Ecologists can count all the individuals in a population. Or they can count the number of individuals in randomly located plots, calculate the average density in the samples, and then extrapolate to estimate the entire population in the entire area. 3. Clumping may occur in plants from soil conditions or in animals where humidity is higher or may be the result of mating behavior or groups living. Unifrom dispersion may result from direct interactions between individuals or because of territoriality. Random dispersion may result from direct interactions between individuals in a population only occurs in the absence of strong attractions or repulsions among individuals of a population or where key physical or chemical factors are relatively homogeneous. 4. Life tables are tables of data summarizing mortality in a population. To make a life table you follow the fate of a cohort and determine the number of individuals that die in each age group and calculate the proportion of the cohort surviving from one age to the next. 5. A life table is a table of data summarizing mortality in a population. A reproductive table is an age-specific summary of the reproductive rates in a population. 6. Characteristics of populations that exhibit Type I, II, III survivorship curves: A Type I

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## This note was uploaded on 08/29/2009 for the course BIOL 101 taught by Professor Sakji during the Fall '08 term at Linn Tech.

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Biology Chapter 52 Objectives - Chapter 52 Objectives 1...

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