1. Populations of Organisms
Page 106

2. Key Vocabulary
Population – a group of individuals of the same species.
Habitat- All biotic and abiotic factors in an area, where a species lives, feeds, reproduces.
Niche - It’s HOW a species LIVES within a habitat

3. Population dispersion – the way the individuals of a population are spread out.
Clumped dispersion - in groups
Uniformed dispersion - spread out evenly
Random dispersion – no order

5. Survivorship Curve
Shows the population relationship between the survivors and organisms life span.

6. Type 1: low level infant mortality rate, most of the population survive until an old age.
Ex: human

7. Type 2: Death rate is equal at all ages .
Ex. Birds & small mammals

8. Type 3: High birth rate and high infant mortality rate
Type 3: High birth rate and high infant mortality rate. Those that survive early years survive until old age.
Ex. Fish, plants, amphibians, insects

9. Page 107
Draw 3 boxes that represent the three different dispersion methods.
Draw a graph that represents the three different types of survivorship.

10. Population Changes The size of a population is always changing
Page 108
The size of a population is always changing
If resources are abundant, population size may increase.
If resources are short in supply, population size may decrease.

11. Factors that effect the size of a population?
Immigration – into another population
Emigration- out of another population
Births – making babies
Deaths- predation, disease, starvation

12. How much Life can exist?
Carrying Capacity- The maximum number of individuals an environment can sustain.
Controlled by some limiting factor.
Ex. Food, water, shelter, and space.

15. How do we count a population?
Transect sampling
 quadrant sampling