Bio171-F08-lec15 - Biology 171 Lecture 16 Monday October 6...

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Lecture 16: Monday, October 6, 2008 Biology 171 Today’s Topic: Population Ecology Announcements This Week in Discussion: Human Genetic Disease Text Reading: Lec 15: 2 nd ed: Chapter 52 (1192-1211) 3 rd ed: Chapter 52 (1173-1193) Lec 16: 2 nd ed: Chapter 11 (227-245); Chap 12 (260-263) 3 rd ed: Chapter 11 (222-240); Chap 12 (258-260) Population Dynamics Exponential Growth Model Logistic Growth Model Metapopulations Human Population Growth
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Population Ecology A population is a group of individuals from the same species that live in the same area at the same time. Population ecology is the study of how and why the number of individuals in a population changes over time, i.e. , the dynamics of population change.
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Population dynamics. Lacerta vivipara
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Life Tables A life table summarizes the probability that an individual will survive and reproduce in any given year over its entire lifetime. Fecundity is the average number of female offspring produced by each female .
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Survivorship is the proportion of offspring produced that survive to a particular age. A survivorship curve is a plot of the logarithm of the number of survivors versus age. This figure shows the three general types of survivorship curves (see Fig 52.2).
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The Role of Life History An organism’s life history consists of how the organism allocates resources to growth, reproduction, and activities related to survival. There is a trade-off between survival and reproduction because every individual has a limited amount of resources and energy at its disposal.
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Experimental demonstration of trade-off between fecundity and longevity in a bird of prey
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A population's growth rate is the change in the number of individuals in the population ( Δ N ) per unit time ( Δ t ). If no immigration or emigration is occurring, the per-capita rate of increase ( r ) is the difference between the birth rate per individual ( b ) and the death rate per individual ( d ). When
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This note was uploaded on 01/30/2012 for the course BIO 171 taught by Professor Josephinekurdziel during the Fall '08 term at University of Michigan.

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Bio171-F08-lec15 - Biology 171 Lecture 16 Monday October 6...

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