BIO LAB QUIZ SPATIAL

Learning objectives:

1. Population growth factors

2. Types of growth

3. Factors controlling population growth rate

4. Carrying capacity

5. Demography

6. Human population growth

1. Factors influencing population growth

1. Births

2. Deaths

3. Immigration (individuals moving INTO the population)

4. Emigration (individuals moving OUT of the population)

How do I calculate change in the population size?

population change= (births + immigrants) - (deaths + emigration)

Exponential Population growth

Occurs under IDEAL conditions

1. resources are UNLIMITED

2. NO migration

How to calculate exponential growth

Density- dependent factors

1. Biotic Factors that slow population growth as density increases

2. These LIMIT POPULATION GROWTH by causing a DROP in birth rates and an INCREASE in death rates

3. Eventually, births=deaths and growth=0 a. The population size stabilizes b. This is the carrying capacity (K)!!

Logistic population growth

Examples of density-dependent factors

1. INTRAspecific: WITHIN a species, competition for limited resources (low food supply, limited space)

2. Predation

3. Disease

Demography

The statistical study of HUMAN populations

1. Population size (N)

2. Birth rate (b)

3. Death rate (d)

4. Age structure

Population Age structure

the distribution of age groups within a population