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Population Ecology

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Campbell Biology CH 53. Population Ecology. Which do you think is the most important in population ecology?. Age Structure Environmental Factors Population Density & Distribution Population Size & Growth Survivorship. All of the following are required to be in a population EXCEPT:.

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which do you think is the most important in population ecology
Which do you think is the most important in population ecology?
  • Age Structure
  • Environmental Factors
  • Population Density & Distribution
  • Population Size & Growth
  • Survivorship
all of the following are required to be in a population except
All of the following are required to be in a population EXCEPT:
  • Interact
  • Interbreed
  • Share Resources
  • Same Environment
  • Same Species
  • Uniform Distribution
population density is the
Population density is the
  • Total # of Individuals
  • # of Individuals per Area
  • # of Individuals per Volume
  • Both 2 & 3
population density can be determined by
Population density can be determined by
  • Mark-Recapture
  • Dispersal
  • Direct Count
  • Both 1 & 2
  • Both 1 & 3
  • Cannot ever be fully determined
population same species resources environment that interact interbreed
Population = same species, resources, environment that interact/interbreed
  • Population Density = how many individuals are living in a specific area or volume.
  • Use density to determine count and vice versa … think back to our yeast lab.
  • General Distribution

U2-5 Describe interactions and factors that affect population size and growth.

bio hac tapping into knowledge
BIO HAC: Tapping Into Knowledge
  • Topic: Population Ecology & Survivorship.
  • Questions:
    • What is the effect of age on survival in human populations?
    • What is the effect of gender on survival in human populations?
  • Hypothesize It!
  • Analyze It! Make 3 Graphs
  • Conclude It!

U2-5 Describe interactions and factors that affect population size and growth.

survivorship how long will you survive
Survivorship = How long will you survive?

U2-5 Describe interactions and factors that affect population size and growth.

exponential population growth assumes
Exponential population growth assumes
  • Short Gestation
  • Long Gestation
  • Unlimited Resources
  • Limited Resources
which of the following limit exponential growth
Which of the following limit exponential growth?
  • Immigration
  • Emigration
  • Deaths
  • Births
  • Both 1 & 3
  • Both 2 & 3
  • Both 2 & 4
exponential population growth
Exponential Population Growth
  • Growth=(New Individuals)–(Loss of Individuals)
  • Equations:
    • Where:
      • r is the per capita growth rate
      • N is the population size
      • ΔN is the change in population
      • Δt is the time interval

U2-5 Describe interactions and factors that affect population size and growth.

exponential population growth1
Exponential Population Growth

U2-5 Describe interactions and factors that affect population size and growth.

population growth example problem
Population Growth Example Problem
  • In 2009, the USA had a population 307 million. If there were 14 births and 8 deaths per 1,000 people, what is the growth rate of US citizens in 2009 (not including Immigration or Emigration)?

U2-5 Describe interactions and factors that affect population size and growth.

logistical growth is more representative of populations because
Logistical growth is more representative of populations because
  • Populations are limited by resources
  • Birth & Death Rates Oscillate
  • Density is independent
logistical population growth
Logistical Population Growth
  • Carrying Capacity (K) = the total number of individuals an ecosystem can support.
  • Equation:

U2-5 Describe interactions and factors that affect population size and growth.

exponential vs logistical growth
Exponential vs. Logistical Growth

U2-5 Describe interactions and factors that affect population size and growth.

logistical growth of organisms
Logistical Growth of Organisms

U2-5 Describe interactions and factors that affect population size and growth.

factors affecting population growth
Factors Affecting Population Growth

Density-independent

Density Dependent

Competition

Predation

Toxic Waste

Intrinsic Factors

Territoriality

Disease

  • Climate/Weather
  • Natural Disasters
  • Etc.

U2-5 Describe interactions and factors that affect population size and growth.

survivorship life history
Survivorship & Life-History

R-Selected Species

K-selected Species

Density-Dependent Selection of Traits

Examples:

Low # of offspring with large investment/energy of care.

  • Density-Independent Selection of Traits
  • Examples:
    • High # of offspring with little investment/energy towards care.

U2-5 Describe interactions and factors that affect population size and growth.

k selection in american kestrels
K-Selection in American Kestrels

U2-5 Describe interactions and factors that affect population size and growth.

population dynamics many factors affect population success
Population Dynamics: Many Factors Affect Population Success

U2-5 Describe interactions and factors that affect population size and growth.

predator prey cycles
Predator-Prey Cycles

U2-5 Describe interactions and factors that affect population size and growth.

human population growth
Human Population Growth
  • http://www.youtube.com/watch?v=4BbkQiQyaYc
human population growth1
Human Population Growth

U2-5 Describe interactions and factors that affect population size and growth.

age structure diagrams
Age Structure Diagrams

U2-5 Describe interactions and factors that affect population size and growth.

comparisons of industrialization
Comparisons of Industrialization

U2-5 Describe interactions and factors that affect population size and growth.

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