Population Density
Number of individuals per unit of area
Population Density
Organisms that do not seem to have a specific arrangement in their population demonstrate this type of dispersion.
Random dispersion
What are the four factors that contribute to population change?
Birth, Immigration, Death, Emmigration
Define abiotic
Non living
What letter is used to symbolize population size?
N
If there are 100 flies in a room that is 20 square feet. What is the density?
5 flies per squared foot
The three specific patterns of dispersion we learned in class.
random, clumped, uniform
Things such as light, water, nutrients, minerals and oxygen that can affect a populations ability to grow.
Limiting Factor
The movement of organisms into an environment or area.
immigration
The unit that should be placed on the X axis when plotting a population graph.
Time
What is the formula for population density?
Number of Individuals/Unit of Area
The type of dispersion that is best for protection, hunting, and/or surrounding a resource.
Clumped Dispersion
Type of growth where the growth rate decreases as the population reaches carrying capacity.
Logistic Growth
Define biotic
Living
What letter is used to symbolize carrying capacity?
K
What is the difference between the density and distribution of a population?
Density = number of individuals/unit of area
Distribution = how members of a population arrange themselves
Type of dispersion demonstrated by humans.
Clumped Dispersion.
Things such as weather, natural disasters, pollution, sudden climate change that can affect populations.
density independent limiting factors
The movement of organisms out of an area or population.
Emmigration
Organisms like zebras run in herds to avoid predators, this is a pattern called:
clumped dispersion
Population Density of a herd of deer that includes 50 individuals in a 2km^2 area.
25
The type of population dispersion that most flowers and plants adhere to.
Random dispersion
Two factors that might cause a population to reach carrying capacity in an ecosystem.
Answers will vary (Examples include: food, water, ecological conditions, space, shelter)
The maximum number of individuals an environment can support.
Carrying Capacity
Which type of population growth is realistic over a long period of time?
Logistic Growth