Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Population ecology is the study of how populations — groups of individuals of the same species living in a specific area — interact with their environment and change over time.
This refers to the number of individuals per unit area or volume. It's like counting the number of people living in each apartment building in our city analogy.
This is the maximum population size that an environment can sustain indefinitely. It's similar to knowing how many people can comfortably live in our imaginary city without exhausting resources.
Demography: The statistical study of populations, especially human beings. In our city analogy, this would be like studying who lives in the city - their ages, occupations, etc.