1. Objective: What are the factors that affect population size?

2.  Take the page and divide it into 6 equal boxes  Number the boxes Notes: Populations12 34 56

3.  Geographic distribution: the area the population lives in  Population Density: number of individuals per unit area  Growth rate: how quickly a population increases or decreases

4.  # of births  #deaths  # of individuals that enter or leave the  Immigration: enter into an area  Emigration: leave an area

5.  J-shaped graph  Under ideal conditions: unlimited resources TIME POPULATION SIZE

6.  Quick growth in beginning  As resources become limited growth slows or stops  Carrying Capacity: max # of individuals an environment can support Carrying capacity Time Population Size

7.  Anything that’s causes population growth to decrease  Examples:  Competition  Disease  Natural Disaster

8. Talk it Over: 1) A food chain 2) Name 3 abiotic factors in this ecosystem 3) Identify 3 different limiting factors

9. Copy down and fill in with:, or = Population increase = birth rate _____ death rate Population decrease = birth rate _____ death rate Population stable = birth rate _____ death rate > < =