Terms in this set (30)
Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere.
Describes living factors in the environment.
An individual living thing
A group of similar organisms that can breed and produce fertile offspring.
A group of individuals that belong to the same species and live in the same area
All the different populations that live together in an area
A community of organisms and their abiotic environment
the variety of life in the world or in a particular habitat or ecosystem.
A term that typically describes a species that no longer has any known living individuals.
series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
An organism that makes its own food
organism that obtains energy from the foods it consumes; also called a consumer
An organism that can make its own food.
An organism that obtains energy by feeding on other organisms
A consumer that obtains energy by eating only plants.
A consumer that eats both plants and animals
A consumer that eats only animals.
An organism that breaks down wastes and dead organisms
the number of deaths each year
the number of live births each year
movement of individuals into a population
movement of individuals out of an area
Rate of increase or decrease of a population
Largest number of individuals of a population that a environment can support
plants and animals that have migrated to places where they are not native
An ecological succession that begins in an area where no biotic community previously existed
Succession following a disturbance that destroys a community without destroying the soil
a stable community that no longer goes through major ecological changes