An organism that can produce its own organic nutrients from carbon dioxide using energy from the sun

An organism that can produce its own organic nutrients from carbon dioxide using energy from chemicals

An organism that cannot produce its own food and therefore must consume other organisms to gain nutrients and energy

An animal that feeds on plants

An animal that eats other animals

An animal that eats both plants and animals

an animal that feeds on dead organic material

Different species compete for the same limited resource. (-/-)

Competition between members of the same species for the same limited resource (-/-)

An interaction in which one organism kills another for food (+/-).

An interaction in which an organism eats parts of a plant or alga (+/-)

An interaction in which one organism lives on or in a host and harms it (+/-)

An interaction between two species in which both species benefit (+/+)

A local population of organisms that have similar genes, interbreed, and produce offspring

A change in the relative numbers of the different groups of individuals making up a population

A specific role of a species within an ecosystem, including its use of resources, and relationships with other species.

A long period of dry weather

An extreme shortage of food

A group of spatially separated populations of one species that interact through immigration and emigration.

Short-term regular variations related to the time of year

The movement of individuals away from centres of high population density or their area of origin.

The genetic differences in every individual

The ability to produce offspring

The ratio of live births in an area to the population of that area (birth rate)

The ratio of deaths in an area to the population of that area (death rate)

The movement of individuals into a population from another population

The movement of individuals out of a population into another population

The damage that is done to a habitat that results in the loss of resources