the study of interactions between different organisms and their environment

organisms that can reproduce and have fertile offspring

a group of the same species in the same area

2 or more populations in the same area

all of the organisms and their physical environment

A group of ecosystems with similar climates and organisms

Earth

non-living factors in an ecosystem

liviing factors in an ecosystem

aka producers (make their own food)

A consumer that eats only plants.

organism that obtains energy by eating both plants and animals

A consumer that eats only animals.

An organism that breaks down wastes and dead organisms

organism that feeds on plant and animal remains and other dead matter

amount of energy that is passed to the next trophic level

amount of energy that used for life processes or lost as heat

accumulation of pollutants, toxins, or pesticides at successive trophic levels

total amount of living tissue within a given trophic level

producers make this "food" using sunlight or chemicals

A series of steps in which organisms transfer energy by eating and being eaten (1-way path)

network of complex feeding interactions of organisms in an ecosystem

Place where an organism lives

Full range of what an organism does to survive and reproduce where it lives

all cycles that go through the air

cycle that does not go through the air; uses the weathering of rocks

Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time

A relationship between two species in which both species benefit

A relationship between two organisms in which one organism benefits and the other is unaffected

A relationship between two organisms of different species where one benefits and the other is harmed