An ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity

Details An ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity An ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity

2010-01-20

arxiv.org/abs/1001.3449v1

Biology

Quantitative Biology

Populations and Evolution

Summry of comments presented at the North American Paleontological Convention, June 25, 2009

Scientific paper

A 62 Myr periodicity is superimposed on other longer-term trends in fossil biodiversity. This cycle can be discerned in marine data based on the Sepkoski compendium, the Paleobiology Database, and the Fossil Record 2. The signal also exists in changes in sea level/sediment, but is much weaker than in biodiversity itself. A significant excess of 19 previously identified Phanerozoic mass extinctions occur on the declining phase of the 62 Myr cycle. appearance of the signal in sampling-standardized biodiversity data, it is likely not to be a sampling artifact, but either a consequence of sea-level changes or an additional effect of some common cause for them both. In either case, it is intriguing why both changes would have a regular pattern.

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