Ecology and Environmental Systems

An organism that lives on or inside another organism and benefits at its expense.

A symbiotic relationship in which one species benefits while the other is harmed.

The process by which plants use sunlight to produce food.

A group of individuals of the same species living in the same area.

The study of how and why populations change over time.

The number of individuals in a population.

An interaction in which one organism hunts, kills, and eats another.

An organism that hunts and eats other organisms.

An organism that is hunted and eaten by a predator.

A consumer that feeds directly on producers.