Population Dynamics Flashcards
Add individuals to populations
Birth and immigration
Remove individuals from populations
Deaths and emigration
Is concerned with the factors influencing the expansion, decline, or maintenance of populations
Population dynamics
An important aspect of population dynamics
Dispersal
Can increase or decrease local population densities
Dispersal
Dispersed by winds, water or transported by a variety of mammals
Plant seeds
May spend their lives attach to rocks
Barnacle
Often disperse from the area where they are born
Young mammals and birds
Are changes in the density of predator populations in response to increased prey density
Numerical responses
Moving from place to place in response to changing vole densities
Nomadic
Is a part of a larger population, with which it sustains a limited exchange of individuals through immigration and emigration
Subpopulation
A group of subpopulations living on such patches connected by exchange of individuals among patches makeup of
Metapopulation
Rocky mountain parmesan butterfly
Parnassius smintheus
Summarizes the pattern of survival in a population
Survivorship curve
Population biologist have invented bookkeeping devices that list both of the survivorship and the deaths in a populations
Life tables
A group born during the same time period
Cohort
Consists of the proportion of individuals of different ages within a population
Age distribution
Three types of survivorship curve
Type one survivorship
Type 2 survivorship
Type 3 survivorship
Survival is high and most mortality occurs among older individuals
Type 1 survivorship
Constant rates of survival throughout life produced straight line pattern survival
Type 2 survivorship
Extremely high rates of mortality among young and followed by a relatively high rate of survival
Type 3 survivorship
Reflects it’s history of survival, reproduction, and potential for future growth
Age distribution
Indicate periods of successful reproduction, periods of high and low survival
Age distribution
Means the number of young born per female in a period of time
Birthrate
Refers to any other processes that produce new individuals in the population
Birth
The tabulation of birthrates for females of different ages in a population is called
Fecundity schedule
