emery_Lecture_12-1 - Lecture12Densityindependentgrowth

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Lecture 12 – Density-independent growth Intro to population growth models - because interested in spread dynamics, impact of human growth, etc. - why math models? 1. generates testable predictions 2. allows us to make generalizations 3. exam mechanisms underlying patterns in nature - if take predator out of system, what happens? - response variable - population  – group of individuals of the same species in the same area that  have a high  probability of interacting - sexual: interbreeding individuals and their offspring   vs. asexual: in the same area - entire population of humans is global - populations aren’t well defined - 4 factors that can change population size 1. births 2. death 3. immigration 4. emigration - 2 types of populations 1. continuously breeding - ex: humans 2. discrete intervals - ex: migratory birds, deer, flowering plants Density-independent population growth: discrete time
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This note was uploaded on 04/11/2011 for the course BIO 585 taught by Professor R.howard during the Winter '08 term at Purdue.

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emery_Lecture_12-1 - Lecture12Densityindependentgrowth

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