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Ecol-2

Ecological Interactions

TermDefinition
competition both species (or organisms within one species) need to use the same, limited resource. Negative-Negative
predation one species (predator) hunts and kills another (prey) for food. Positive-Negative
herbivory one species eats part or all of a plant species. Positive-Negative
parasitism one species makes its living off of another species. Positive-Negative
commensalism One species benefits from the interaction, but the other species is not affected Positive-Neutral
mutualism both species benefit from the interaction. Positive-positive
niche an organism's "job" in the environment: what it eats, where it lives, what it does, how it interacts, etc.
schooling behavior by some animals in which a large group moves together; thought to distract predators
primary succession sequence of communities that develops in an area starting as bare rock, with no soil yet.
secondary succession sequence of communities that develops after a disturbance wipes out part of the ecosystem, but some soil and other traces remain
exotic species a species that is not native to the area, but has been introduced from another area
invasive species a non-native species that does harm to the ecosystem
Created by: Jennifer_Clough