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Bio ch14 3 slide show
 

Bio ch14 3 slide show

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    Bio ch14 3 slide show Bio ch14 3 slide show Presentation Transcript

    • 14.3 Population Density And Distribution Warm-Up 14.3 • List 3 open ended questions and 2 closed ones. • Place an asterisk next to your most important quest.
    • 14.3 Population Density And Distribution KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.
    • 14.3 Population Density And Distribution Population density is the number of individuals that live in a defined area. • Scientists can calculate population density.
    • 14.3 Population Density And Distribution Geographic dispersion of a population shows how individuals in a population are spaced. • Population dispersion refers to how a population is spread in an area. Clumped dispersion • Populations Distribution Uniform dispersion Random dispersion
    • 14.3 Population Density And Distribution • There are three types of dispersion. – clumped
    • 14.3 Population Density And Distribution – uniform
    • 14.3 Population Density And Distribution – random
    • 14.3 Population Density And Distribution Survivorship curves help to describe the reproductive strategy of a species. • A survivorship curve is a diagram showing the number of surviving members over time from a measured set of births.
    • 14.3 Population Density And Distribution • Survivorship curves can be type I, II or III. – Type I—low level of infant mortality and an older population – common to large mammals and humans – Type II—survivorship rate is equal at all stages of life – common to birds and reptiles – Type III—very high birth rate, very high infant mortality – common to invertebrates and plants
    • 14.3 Population Density And Distribution HW: Ch 14.4 P. 440-444 5 Facts/Page• Study Guide 14.31. What is the formula for population density?2. What might cause the density of deer to increase?3. Sketch three boxes and in each one draw and label the three types of population dispersion patterns.4. Give two reasons why a population might live in a clumped dispersion.5. Give two reasons why a popn. might live in a uniform dispersion.6. What is meant by the term reproductive strategy? What makes reproductive strategies different?7. What is the difference between population dispersion and popn. Density?
    • 14.3 Population Density And Distribution HW: Ch 14.4 5 Facts/Page • Reader 14.3 • Study Guide 14.3 P. 149-150
    • 14.3 Population Density And Distribution Quiz is next I don’t think I’m ready