Chapter 4: Population Ecology Flashcards
Population density is…
The number of organisms per unit area.
Dispersion is…
The pattern of a population within an area.
Density-independent factor is…
Any factor in the environment that doesn’t depend on the number of members in a population per unit area.
Density-dependent factor is…
Any factor in the environment that depends on the number of members in a population per unit area.
Population growth rate is…
Explains how fast a population grows.
Emigration is…
The number of individuals moving away from a population.
Immigration is…
The number of individuals moving into a population.
Logistic Growth Model
Goes in a S-shape
Exponential Growth Model
Goes up. Goes before Logistic Growth.
Carrying Capacity is…
The maximum number of individuals in a species that an environment can support for the long term.
Demography is…
The study of human population size, density, distribution, movement and birth and death rates.
Demographic Transition is…
The change in a population from high birthrate and death rate to low birthrate and death rate.
Age Structure is…
The number of males and females in each of three groups.
Zero Population Growth is…
When the birthrate equals the death rate.
