Population unit 3 Flashcards
Four factors used to determine population growth? What is the equation?
Crude, death rate, crude, birth rate, immigration, emigration
(CBR + immigration) - (CDR + emigration)/10
From the population, growth rate equation, what factors add organisms to a population? Which ones remove organisms from a population?
Add: CBR and immigration
Remove: CDR and emigration
Six characteristics of r selected species
Short lifespan
Short, maturity time
Many offspring
Small offspring
No parental care
Fast population growth rate
Six characteristics of an K selected species
Long life span
Long maturity time
Few offspring
Large offspring
Parental care
Slow population growth rate
Carrying capacity
Max number of individuals in a population that an ecosystem can support
Density dependent factors
Factors that influence population growth based on size
Density independent factor
Factors that influence population growth independent of their size
Example of density dependent factors
Competition for limited food among members of a population, competition for habitat, water, light, and diseases
Example of density independent factors
Natural, disasters, floods, hurricane, tornado, fire
Is risking heart diseases high in developed countries or less developed countries
Developed countries
Total fertility rate
The number of children who would be born per woman
Replacement level, fertility
The level of fertility, at which a population exactly replaces itself from one generation to the next
Infant mortality rate
The number of deaths per 1000 life births of children, under one year of age
Crude birth rate
The number of live births occurring among the population of a given geographical area during a given year, per 1000
Crude death rate
The number of deaths occur among the population of a given geographical area during a given year per 1000
