Your SlideShare is downloading. ×
Population ecology 2011
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Population ecology 2011

6,069

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
6,069
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
170
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • .
  • 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

    ×