population ecology
Download
Skip this Video
Download Presentation
Population ecology

Loading in 2 Seconds...

play fullscreen
1 / 8

Population ecology - PowerPoint PPT Presentation


  • 122 Views
  • Uploaded on

Population ecology. Tabitha Walton and Heath Edwards. Population Ecology. Studies the dynamics of a species’ population and how these populations interact with their environment. Terms and vocabulary. Density : The number of individuals in a given area

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Population ecology' - ojal


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
population ecology

Population ecology

Tabitha Walton and Heath Edwards

slide2
Population EcologyStudies the dynamics of a species’ population and how these populations interact with their environment
terms and vocabulary
Terms and vocabulary
  • Density: The number of individuals in a given area
  • Sex Ratio: The number of males to females
  • Density Dependent: Survival of the population depends on the number of species
  • Density Independent: No relation to population; Ex: natural disasters and disease
  • Limiting Resources: What limits a population; Ex: amount of food/water/predators
  • Carrying Capacity: The number of organisms an area can support
  • Overshoot: When a population becomes larger than the carrying capacity
  • Die-off: Results after an overshoot, because there are not enough resources to support the population
slide4
K- Selected

R- Selected

High survival rates, but die out with older age, mature slowly, tend to be both predator and prey, mostly endangered, tend to be larger.

Ex: Humans, elephants, and sharks.

Have a lot of offspring, but very few make it to adulthood, mature rapidly, tend to be prey, not really endangered, tend to be smaller

Ex: Insects, bacteria, and rodents

survivorship
survivorship

Type I

Type II

Type III

Have great number of offspring and reproduce for most of their lifetime.

Ex: Sea turtles, fish, and oysters

Reproduction occurs pretty early in life, low mortality rate at birth, high rate of surviving to adulthood, death rates increase at old age.

Ex: Humans, elephants, and sheep

Death rate is pretty uniform throughout all variety of ages, typically reach adult stages quickly.

Ex: Rodents and songbirds

survivorship1
survivorship

Type I

Type II

Type III

questions
questions
  • 1.) What environmental factors affects carrying capacity?
  • 2.) R-Selected species tend to have more offspring, how does this affect their survival rate?
  • 3.) That factors have extended the survival rate of humans?
  • 4.) What occurs to a J-shaped curved graph when it reaches an overshoot?
  • 5.) Explain the relationship between limiting resources and a carrying capacity.
population ecology video and sites
Population ecology video and sites
  • http://www.youtube.com/watch?v=RBOsqmBQBQk
  • http://home.comcast.net/~sharov/PopEcol/lec1/whatis.html
  • http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookpopecol.html
  • http://www.eoearth.org/article/Population_ecology
ad