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Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
Population ecology 2011
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Population ecology 2011

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  • .
  • Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.
  • Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.
  • Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.
  • Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.
  • Ok so
  • Transcript

    • 1. POPULATION ECOLOGY
    • 2.
      • POPULATION ECOLOGY
      Population: all the individuals of a species that live together in an area Demography: the statistical study of populations, make predictions about how a population will change
    • 3.
      • Population Dynamics
      • Three Key Features of Populations
        • Size
        • Density
        • Dispersion
          • (clumped, even/uniform, random)
    • 4.
      • Three Key Features of Populations
      1. Size: number of individuals in an area
    • 5.
      • Growth Rate = Birth Rate - Death Rate
      • (# individuals born - # individuals die)
      • Age Distribution
      • Number of individuals in different age groups of a population
      • Indicates the potential of a population to increase, decrease or remain stable in size over time
      RATE OF GROWTH & AGE DISTRIBUTION
    • 6. PRE-REPRODUCTIVE REPRODUCTIVE POST-REPRODUCTIVE
    • 7. Population of a Stable Country   
    • 8. THREE TYPES OF POPULATIONS
    • 9. Which is growing faster? You decide!
    • 10.
      • Three Key Features of Populations
      2. Density: measurement of population per unit area or unit volume Pop. Density = # of individuals ÷ unit of space
    • 11.  
    • 12.
      • 1. Immigration- movement of individuals into a population
      • 2. Emigration- movement of individuals out of a population
      4 Factors that affect density
    • 13. 4 Factors that affect density
      • 3. Density-dependent factors- Biotic factors in the environment that have a greater limiting effect as population size increases
      •   Examples: disease
      • competition
      • parasites
    • 14.
      • 4. Density-independent factors- Abiotic factors in the environment that affect populations regardless of their density
      •   Examples: temperature
      • storms
      • habitat destruction
      • drought
      4 Factors that affect density
    • 15. Immigration Emigration Births Deaths Population Change + + - - Factors That Affect Future Population Growth
    • 16.
      • Three Key Features of Populations
      • 3. Dispersion: describes the spacing or organisms relative to each other
        • clumped
        • even or uniform
        • random
    • 17. clumped even (uniform) random THREE TYPES OF DISPERSION
    • 18. Population Dispersion
    • 19. OTHER FACTORS THAT AFFECT POPULATION GROWTH
      • Limiting factor - any biotic or abiotic factor that restricts the existence of organisms in a specific environment
        • Examples: Amount of water
          • Amount of food
          • Competition
          • Predation
          • Amount of living space
          • Disease
          • Parasitism
        • Can be density dependent or independent
    • 20. OTHER FACTORS THAT AFFECT POPULATION GROWTH
      • Carrying Capacity- the maximum population size that can be supported by the available space and environmental resources
      • Carrying capacity can change as limiting factors become more or less severe for a given population
    • 21.
      • TWO BASIC PATTERNS OF POPULATION GROWTH
      Carrying Capacity (k) Nu m b e r Time J-shaped curve (exponential growth) S-shaped curve (logistic growth)
    • 22.  
    • 23. CARRYING CAPACITY -------------------------------------------------- CARRYING CAPACITY
    • 24. 2 Life History Patterns
      • 1. R Strategists
        • short life span
        • small body size
        • reproduce quickly
        • have many young
        • little parental care
        • Examples: cockroaches, weeds, bacteria
    • 25. 2 Life History Patterns
      • 2. K Strategists
        • long life span
        • large body size
        • reproduce slowly
        • have few young
        • provides parental care
        • Examples: humans, elephants
    • 26. HUMAN POPULATION THROUGH THE AGES
    • 27. HUMAN POPULATION THROUGH THE AGES
    • 28. Human Population Growth

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