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Biology –9 th Grade. CHAPTER 5 NOTES. CHARACTERISTICS OF A POPULATION. DENSITY GROWTH RATE GEOGRAPHIC DISTRIBUTION. 3 FACTORS THAT AFFECT POPULATION. # OF BIRTHS # OF DEATHS # OF IND. THAT ENTER AND LEAVE A POPULATION. 2 TYPES OF POPULATION GROWTH. EXPONENTIAL GROWTH.

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Presentation Transcript
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
exponential growth
EXPONENTIAL GROWTH

POPULATION GROWS EXTREMELY RAPID AND AT A CONSTANT RATE

logistic growth
LOGISTICGROWTH

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?
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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.

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