Lect 12 Population Dynamics I PP outline

Lect 12 Population Dynamics I PP outline - Population...

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Population Ecology A POPULATION is a group of individuals of the same species that occur together in space and time. When we discuss populations, there are a number of population characteristics of interest. Population Ecology… Size Density The number of individuals per unit area Dispersion The pattern of spacing of individuals within the geographical boundaries of the population. Age distribution % of the population within particular age categories Population Change Populations change over time. Globally, this occurs in two ways: Births Deaths We define a birth rate as the number of births per 1,000 individuals of the population per year We define a death rate as the number of deaths per 1,000 individuals of the population per year. Population Change… If b > d the population will increase If b < d the population will decline If b = d the population remains stable Population Change… Then, the intrinsic rate of increase or growth rate is: Birth rate minus death rate
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This note was uploaded on 04/26/2008 for the course BIOLOGY 118 taught by Professor Richardson during the Spring '08 term at Winona.

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Lect 12 Population Dynamics I PP outline - Population...

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