background extinction

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background extinction

[′bak‚grau̇nd ik‚stiŋk·shən]

(evolution)

Intervals of lower extinction intensity between mass extinctions.

References in periodicals archive ?

The team purposefully used a lower estimate for the values to see if even the lowest difference between current and background extinction rates affirmed an advancing mass extinction.

A Sixth Mass Extinction?

Even this five-fold increase in background extinction rates, however, vastly understates the magnitude of the current extinction event because it is derived only from extinction of species known to science.

Conservation Genetics: Case Histories from Nature

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