18 terms

Ecosystems

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Ecosystem
All of the living and nonliving things that interact in an area
Biotic factors
Living things (organisms) in an ecosystem.
Abiotic factors
Nonliving things in an ecosystem.
Habitat
The specific environment that supplies all the organism's needs
Species
A group of similar organisms that can mate with one another and produce fertile offspring.
Niche
The role an organism has in its environment.
Producer
An organism that can make its own food.
Consumer
An organism that obtains energy by feeding on other organisms.
Herbivore
Consumers that eat only plants.
Omnivore
Consumers that eat both plants and animals.
Carnivore
Consumers that eat only animals.
Detritivore - Scavenger
Consumer that feeds on the bodies (remains) of dead organisms.
Decomposers
Organisms that break down wastes and dead organisms and return the raw materials to the environment.
Food chain
A series of events in which one organism eats another and obtains energy.
Food web
Overlapping food chains in an ecosystem.
Energy pyramid
A diagram that shows the amount of energy available in each step (trophic level) of a food chain.
Photosynthesis
The process in which producers use light energy to make food.
Chemosynthesis
The process in which producers use chemical energy (rather than light energy) to make food.