Flashcards in science: chpt. 4 big quiz Deck (10)
When birthrate equals death rate
Zero population growth (ZPG)
The study of human population size, density, distribution, movement, and birth and death rates
The maximum number of individuals in a species that an environment can support
Use to describe the number of individuals moving away
Use to describe the number of people coming into a population
What are some density–independent factors?
Abiotic factors such as flooding, extreme heat or cold, tornadoes, hurricanes.
What are density–dependent factors?
Biotic factors such as predation, disease, parasites, and competition.
Number of organisms per unit area
The pattern of spacing in a population with in an area