Studied by 6 people
Population
The smallest unit that can show how evolution works
Dispersion
The pattern of spacing of a population
Mortality
Death rate
Natality
Birth rate
Immigration
The organisms moving into a population
Emigration
The organism moving out of a population
Population density
The number of organisms in a given area
Limiting factor
Things that might slow the growth of a population
Demography
The study of a human population
Carrying Capacity
The maximum number of individuals that an environment can support for the long term
Age Structure
A method of charting population according to gender & specific years of birth.
4 Population Rates
Immigration
Emigration
Mortality
Natality
Environment affect on Population
It gives the resources and the land for the population to survive on
Closed Population
No immigration or emigration, not a typical population. It grows, stabilizes and then die out
Open Population
Natural and typical of most populations where immigration and emigration fluctuates
Exponential Growth
Populations that increase slowly and then rapidly
Represents the ideal conditions available for an organism's growth Rapid increase in population
The larger the population gets the faster it grows
Example: World population
Linear Growth
Growth that is steadily increasing throughout time
Example: USA
Logistic Growth
Growth is steadily increasing and eventually stables off, also called zero population
This occurs when a population stabilizes
The population of the area is not growing but also isn’t declining
Example: Italy
Uniform Dispersion
Organisms are evenly spread out throughout the area
Example: Black bears
Clumped Dispersion
Organisms that live in groups or herds
Example: Buffalo, cattle, gease
Random Dispersion
Organisms spread out without a set pattern, usually wherever the resources are available
Example: Deer
Populations need these factors to survive
What is a limiting factor? How do these affect a population?
Carrying capacity is reached
When the population starts going down rapidly because there aren’t enough resources for the population.
Population growth problems
Clean water will be limited
Lack of space to live
Lack of wildlife
Lack of food
Lack of opportunities for solitude
More polluted air
More noise
More acid rain
More oil spills
More poverty
The more dense an area is, the more crowded it is. The less dense a area is the less crowded
How does population density relate to crowdedness?
Note 
Flashcard (25)