Lecture 26 Flashcards

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1
Q

Biological community

A

Populations of organisms in a prescribed area or habitat

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2
Q

Species richness

A

Number or species in a community

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3
Q

Species evenness

A

Relative abundance or species

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4
Q

Diversity Index- Shannon Wiener Index

A

H=-£pílnpí

Pí=proportion of species í in total sample

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5
Q

Keystone species

A

Species with disproportionate effect on diversity relative to biomass

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6
Q

Succession

A

Replacement of populations of habitat through a stable state

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7
Q

Primary succession

A

Creation of new habitat

Ex) lava flow, glaciation, sand dunes

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8
Q

Intermediate disturbance hypothesis

A

Species diversity will be highest at intermediate levels of disturbance

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9
Q

Food web

A

Community portrait based on feeding relationships

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10
Q

Tropic level

A

Feeding position within food web

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11
Q

Primary produce-herbivore-primary consumer- 3°consumer

A

J

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12
Q

Indirect effects

A

Interaction between 2 species altered by 3rd species

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