9 Flashcards

1
Q

Alpha diversity?

A

of species or diversity within a local habitat

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2
Q

Beta diversity?

A

Change in the species composition between localities across space or environmental gradient (proportion of shared species across sites).

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3
Q

Gamma diversity?

A

of species or diversity within a larger region; a function of both alpha and beta diversity.

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4
Q

Equation of beta diversity?

A

Gamma diversity - alpha diversity

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5
Q

If alpha diversity =~ gamma diversity?

A

Low beta diversity

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6
Q

If alpha diversity < gamma diversity?

A

High beta diversity

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7
Q

One way to calculate beta diversity?

A

Gamma - mean (alpha diversity across all the sites)

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8
Q

Species turnover?

A

Beta diversity that is measured along the axis of variation in the environment (e.g. abiotic gradient)

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9
Q

Edge points?

A

The peripheral of a study site

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10
Q

If you have high overlap between different compositions, how will that affect beta diversity?

A

Beta diversity will be lowered.

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11
Q

The higher the species turnover, the ______ beta diversity?

A

Higher

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12
Q

Factors that contribute to species diversity in order of levels?

A

Global scale -> Geographic barriers to dispersal (regional scale) -> Habitat partitioning within ecoregions (landscape scale) -> microhabitat niche partitioning (e.g. understory vs canopy) (local scale) -> biotic interactions

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13
Q

Spatial scales can tell us in terms of species diversity?

A

The patterns of species diversity and the abiotic factors that limits their range.

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14
Q

If there is a limit in species richness in the global scale, then the limit must apply to?

A

Local scales

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15
Q

Local species richness can be determined by what type of niche?

A

Realized niche

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