Unit 1: Population Growth and Resource Availability Flashcards
Population size is denoted as what?
N
Population density
The number of individuals per unit area at a given time.
Population distribution
How individuals are distributed with respect to one another.
Define density dependent factors
A factor that influences an individual’s probability of survival and reproduction in a manner that depends on the size of the population.
Density dependent factors
Competition, space, resources, predation, and disease.
Define density independent factors
A factor that has the same affect on an individual’s probability of survival and reproduction at any population size.
Density independent factors
Fire, drought, hurricanes, and pest spraying.
Define dynamic
Constantly changing
The characteristics of populations changing
Age structure, density, distribution, sex ratio, and size.
Population density determines what?
Whether a species is abundant or rare in an area.
Uniform distribution
When individuals are spaced out evenly, common for territorial animals that protect similar sizes of area.
Clumped distribution
What animals are in groups, common were living in groups provide safety and feeding opportunities.
What are the three types of distribution?
Clumped, random, and uniform.
