1. POPULATION ECOLOGY Tabitha Walton and Heath Edwards

2. STUDIES THE DYNAMICS OF A SPECIES’ POPULATION AND HOW THESE POPULATIONS INTERACT WITH THEIR ENVIRONMENT Population Ecology

3. 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

4. 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

5. SURVIVORSHIP Type IType IIType III 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 Have great number of offspring and reproduce for most of their lifetime. Ex: Sea turtles, fish, and oysters

6. SURVIVORSHIP Type I Type II Type III

7. 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.

8. POPULATION ECOLOGY VIDEO AND SITES  http://www.youtube.com/watch?v=RBOsqmBQBQk http://www.youtube.com/watch?v=RBOsqmBQBQk  http://home.comcast.net/~sharov/PopEcol/lec1/whatis.html http://home.comcast.net/~sharov/PopEcol/lec1/whatis.html  http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookpopecol.ht ml http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookpopecol.ht ml  http://www.eoearth.org/article/Population_ecology http://www.eoearth.org/article/Population_ecology