Module 55 - Community Ecology Flashcards

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1
Q

Simpson’s diversity index

A

A way to quantify a community’s diversity.
1 - Σ(n/N)^2
n = the total number of organisms of a particular species
N = the total number of organisms of all species

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2
Q

Predation

A

An interaction that involves one species killing another and consuming it

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3
Q

Parasitism

A

An interaction in which one species lives in or on another organism, which we call the host (ones that cause diseases are called pathogens)

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4
Q

Competition

A

An interaction between species that require the same limited resource

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5
Q

Niche partitioning

A

When two species compete over long periods of time, evolution favors individuals with phenotypes that reduce the amount of competition for the limited resource

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6
Q

Mutualism

A

A special type of symbiosis in which both species benefit in regard to their growth or reproduction

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7
Q

Commensalism

A

An interaction in which one species receives a benefit while the other species is neither harmed nor helped

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8
Q

Keystone species

A

A species that has a disproportionate impact on other species even though it may not be very abundant.

An example of a keystone species is a beaver

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