Populattion biology handout s2010

Populattion biology handout s2010 - Population Dynamics 1...

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Population Dynamics 1 I. Overview The way that populations grow and the factors that affect their growth are subjects of great importance with regards to our management and conservation of natural resources. Population models are developed to help us predict future abundance. We will introduce key concepts in population dynamics and show how they are employed in simple models. II. Population growth is dependent on birth rate and mortality rate A. Population growth in a time period (∆N / ∆t) is the difference between the number of births (B) and the number of deaths (D) B. Birth and death rates are per-capita values 1. The number of births is the birth rate (b) times the population size 2. The number of deaths is the death rate (d) times the population size 3. ∆N / ∆t = b N – d N III. A population with a constant birth rate and a smaller constant death rate will grow at an accelerating pace and without limit A. Call the difference between a constant b and constant d, “ r” B. ∆N / ∆t = r N
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This note was uploaded on 04/12/2010 for the course BIO 187 taught by Professor Plowes during the Spring '10 term at University of Arizona- Tucson.

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Populattion biology handout s2010 - Population Dynamics 1...

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