1. Populations chapter 5 in text

2. 3 factors affecting population size
Births
Deaths
Immigration and Emigration

3. Growth without limiting factors

4. Growth without limiting factors
Under ideal conditions a population will show exponential growth
What are ideal conditions?

5. Limiting factors can be density-dependent or density-independent
Density-dependent factors are limiting factors that depend on population size
Examples of density-dependent factors:
Examples of density-independent factors:

6. Density-dependent or Density-independent?

7. Density-dependent or Density-independent?

8. Density-dependent or Density-independent?

9. Growth with limiting factors
Under such circumstances a population show an s-shaped curve, indicating logistic growth

10. What is “K”?

11. What is “K”?
“K” stands for a concept called carrying capacity, which is the largest number of individuals with in a species that the environment can support.

12. What is shape of global human growth?

13. What is shape of global human growth?

14. What is shape of global human growth?

16. r-selected vs. K-selected species

21. Characteristics of r- and K-selected organisms
r-organisms
K-organisms
short-lived
long-lived
small
large
weak
strong or well-protected
waste a lot of enrgey
energy efficient
less intelligent
more intelligent
have large litters
have small litters
reproduce at an early age
reproduce at a late age
fast maturation
slow maturation
little care for offspring
much care for offspring
strong sex drive
weak sex drive
small size at birth
large size at birth

22. What are your demographics?
Demographics: the statistical data of a population, especially those showing average age, income, education, etc.

23. Age-structure diagrams predict future population size, looking at age, gender
Match the countries: US, Germany, Kenya, Italy

24. Age-structure diagrams predict future population size
Match the countries: US, Germany, Kenya, Italy