Ecology (ch 5 & 6)
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
586
On Slideshare
575
From Embeds
11
Number of Embeds
1

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 11

http://biology-i-hon-a-semester-1-7-c.avon-hs.schoolfusion.us 11

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

Transcript

  • 1. Ecology (Ch 5 & 6)
  • 2. Populations
    • Group of the same species living in the same area
    • Important Features
      • Geographic Distribution
      • Density
      • Growth Rate
      • Age Structure
  • 3. Geographic Distribution
    • Range of Locations that the species is found in
    • Controlled by tolerances for the species
    • Also controlled by geographical barriers
  • 4. Population Density
    • # of individuals of a species within a unit area
    • Different in different species and ecosystems
    • Based on biotic and abiotic factors
  • 5. Population Growth
    • Change in size of a population
    • Factors that affect growth
      • Birth rate- # of births in a population over a period of time
      • Death rate- # of deaths in a population over a period of time
      • Immigration (moving in) and Emigration (moving out)
  • 6. Job Offer
    • Job #1
      • Starting salary= $10,000
      • Raise= increased $10,000/day
    • Job #2
      • Starting salary= $0.01
      • Raise= Salary doubled every day
  • 7. Exponential Growth
    • Seen in populations with unlimited resources
  • 8. Logistic Growth
    • Population shows exponential growth until a resource becomes limited
    • Growth is slowed or stopped when population size reaches carrying capacity
    • Carrying capacity (k)- amount of individuals of a population that an area that support
  • 9. Limiting Factors
    • Factor that limits growth
    • Density-dependent factors
      • Affect of factor increases with increasing population density
      • Competition
      • Predation
      • Parasitism and Disease
    • Density-independent factors
      • Affect of factor does not depend of population density
      • Climate changes, natural disasters, and human disturbances
  • 10. Demography
    • Study of the size of human populations
    • Growth rates are controlled by the same factors
      • Birth Rate
      • Death Rate
      • Immigration and Emigration
      • Age Structure
  • 11. Historical Demography
    • Human population used to be low and relatively stable
      • Limited by resources and disease
    • Past 500 years
      • Exponential growth as limits have been removed
  • 12. Age Structures
    • Histogram depicting the number of people in each age category within a population
    • Can be used to predict future growth
  • 13. Biodiversity
    • Variety of Life
    • Important because
      • Provides varied resources
        • Food
        • Products
        • Medicines
      • Creates stability
    • Species Diversity- number of different species
  • 14. Geographic Distribution of Biodiversity
  • 15. Threats to Biodiversity
    • Habitat Loss
      • Deforestation
    • Habitat Fragmentation
    • Pollution
    • Introduction of Invasive species
  • 16. Habitat Loss
  • 17. Resourses
    • Non-renewable - cannot be remade (or only can be remade over a long time period)
    • Renewable- can be remade
    • Sustainable Development- use of renewable resources in a way that does not deplete future supplies
  • 18. Habitat Fragmentation
  • 19. Pollution
    • Water
      • Chemicals, Trash, Temperatures, Noise
    • Land
      • Chemicals, Trash
    • Air
      • Chemicals and Noise
  • 20. Effects of Pollution: Acid Rain
  • 21. Effects of Pollution: Ozone Depletion
  • 22. Effect of Pollution: Biomagnification
    • Chemical pollutant becomes more concentrated as it moves up the trophic levels within a food chain or web
    • Very dangerous for top level predators
  • 23. Invasive Species
    • Also called non-native species
    • Introduced to new habitat
    • Often grows without check because of lack of natural predators or disease in the area
  • 24. Losing Biodiversity
    • Species experiences a decline in growth
    • Threatened
      • Canadian lynx
      • Prairie dog
    • Endangered
      • Bald Eagle
      • Many Marine Mammals
    • Extinct
      • Dodo
      • Passenger Pigeon