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Unit 4 Vocabulary

Ecosystems

TermDefinition
abiotic factor the ethe effects on the ecosystem that are a result of the nonliving parts of that ecosystem
biotic factor a living thing in an ecosystem, such as a plant, an animal, or a bacterium
water cycle the continuous movement of water between Earth’s surface and the air, changing from liquid into gas into liquid
food web the overlapping food chains in an ecosystem
food chain the path that energy and nutrients follow in an ecosystem
niche the role of an organism in an ecosystem
producer an organism that can make its own food
consumer an organism that cannot produce its own food and must eat other organisms (plants or animals) to obtain energy
decomposer an organism that breaks down dead plant and animal matter, releasing nutrients back into the environment for other organisms to use
invasive species a specific classification of a plant or animal that is not native to an ecosystem
limiting factor anything that controls the growth or survival of a population
symbiosis a relationship between two kinds of organisms over time
commensalism a relationship between two kinds of organisms that benefit one without harming the other
parasitism a relationship in which one organism lives in or on another organism and benefits from that relationship while the host organism is harmed by it
mutualism a relationship between two kinds of organisms that benefits both
Created by: jkimball
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