1 / 13

KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy. Population density is the number of individuals that live in a defined area. Population density is a measurement of the number of individuals living in a defined space.

acochran
Download Presentation

KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

  2. Population density is the number of individuals that live in a defined area. • Population density is a measurement of the number of individuals living in a defined space. • Scientists can calculate population density.

  3. Clumped dispersion Uniform dispersion Random dispersion 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.

  4. clumped • There are three types of dispersion.

  5. uniform • There are three types of dispersion.

  6. random • There are three types of dispersion.

  7. 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.

  8. 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 birdsand reptiles • Survivorship curves can be type I, II or III. • Type III—very high birth rate, very high infant mortality • common to invertebrates and plants

  9. Which of the following describes the density of a population? • 5 sloths dispersed randomly • 100 people in the area • 100 wolves per square mile • 1 acre per family

  10. The way in which individuals of a population are spread out is called • Population density • Population dispersion • Survivorship • Predation

  11. Zebra herds that live and move together are an example of what type of dispersion? • Clumped dispersion • Uniform dispersion • Random dispersion • Territorial dispersion

  12. What does a survivorship curve show? • The number of births and deaths each year. • The number of predators that fed on a species’ eggs • The number of offspring born in a particular year • The number of offspring still alive over time

  13. Most mammals have type 1 survivorship curves, which means they have • low infant mortality rate • Roughly equal survivorship rates at all ages • High numbers of offspring so that a few will survive • High levels of predation and uniform dispersion

More Related