gcmd_keyword : PALEOCLIMATE INDICATORS>MASS EXTINCTIONS

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parent	CLIMATE INDICATORS>PALEOCLIMATE INDICATORS
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definition	mass extinction is a sharp decrease in the diversity and abundance of macroscopic life. They occur when the rate of extinction increases with respect to the rate of speciation. Because the majority of diversity and biomass on Earth is microbial, and thus difficult to measure, recorded extinction events affect the easily observed, biologically complex component of the biosphere rather than the total diversity and abundance of life.[1]
identifier	703d0c14-1978-4e7f-a51a-233c695823b9
label	MASS EXTINCTIONS
parent_identifier	c9a5b3eb-7556-41a8-a2b8-c015db80e5b2
GCMD Metadata	703d0c14-1978-4e7f-a51a-233c695823b9
Ancestors	MASS EXTINCTIONS < PALEOCLIMATE INDICATORS < CLIMATE INDICATORS < EARTH SCIENCE < Science Keywords