Biology –9th Grade : Biology –9th Grade Visit www.worldofteaching.com
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CHAPTER 5 NOTES : CHAPTER 5 NOTES
CHARACTERISTICS OF A POPULATION : CHARACTERISTICS OF A POPULATION DENSITY
GROWTH RATE
GEOGRAPHIC DISTRIBUTION
3 FACTORS THAT AFFECT POPULATION : 3 FACTORS THAT AFFECT POPULATION # OF BIRTHS
# OF DEATHS
# OF IND. THAT ENTER AND LEAVE A POPULATION
2 TYPES OF POPULATION GROWTH : 2 TYPES OF POPULATION GROWTH
EXPONENTIAL GROWTH : EXPONENTIAL GROWTH POPULATION GROWS EXTREMELY RAPID AND AT A CONSTANT RATE
LOGISTIC GROWTH : LOGISTIC GROWTH DOES HAVE A PERIOD OF EXP. GROWTH, BUT WILL STOP OR SLOW DOWN. GOES THROUGH A # OF PHASES.
*Carrying capacity – total # of individuals a pop. can support
LIMITING FACTOR : LIMITING FACTOR FACTOR THAT CAUSES THE POPULATION TO DECREASE
Density-Dependent Limiting Factors : Density-Dependent Limiting Factors Factors that depend on the size of a population
Examples – Competition, predation,
disease, parasitism
Density-Independent Limiting Factors : Density-Independent Limiting Factors Affect all pop. regardless of pop. size.
Examples –
Natural disasters,
Weather, and human activities
Slide11 : QUIZ – CH. 5
List 3 factors that affect population growth.
What are 3 characteristics of a population?
What type of growth goes through a period of rapid growth, and slows down or stops?
Slide12 : 4. What is the term for the largest # of individuals a population can hold?
5. What type of growth grows at a constant rate?
6. List some density-dependent limiting factors.
7. List some density-independent limiting factors.