Campbell biology ch 53
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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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Population Ecology

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Campbell biology ch 53

Campbell Biology CH 53

Population Ecology


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.


Once a population reaches carrying capacity it cannot grow anymore

Once a population reaches carrying capacity it cannot grow anymore.

  • True

  • False


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.


Population ecology

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


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