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 ?

That would be 10 extinctions per 10,000 species per year, or 1,000 times the background extinction rate.

Bye bye, birdie ... and myriad other creatures humans are wiping out

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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