Fossil Biodiversity: Red Noise Plus Signal
| dc.creator | Melott, Adrian L. | |
| dc.creator | Lieberman, Bruce S. | |
| dc.date | 2006-06-13 | |
| dc.date | 2006-06-14 | |
| dc.date.accessioned | 2026-07-07T07:12:11Z | |
| dc.date.available | 2026-07-07T07:12:11Z | |
| dc.description | We have examined the Fourier power spectrum as well as the Hurst exponent of extinction, origination, and total biodiversity in the marine fossil record, using a recently improved geologic timescale. We find all of them strongly inconsistent with past claims of self-similarity as well as inconsistent with random walk behavior. Instead, they are dominated by low-frequency power, with approximate f^-2 power over one decade in frequency. The spectrum turns over at about 10^8 y, lending plausibility to connections with galactic dynamics. Even in the background of this low-frequency dominance, a previously noted 62 My biodiversity cycle stands out with better than 99% confidence above the noise level, accounting for about 35% of the total variance in the fossil biodiversity record. | |
| dc.description | 3 page comment including one figure. corrected typo in abstract & figure caption | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0606325 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0606325 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/111998 | |
| dc.subject | Astrophysics | |
| dc.subject | Populations and Evolution | |
| dc.title | Fossil Biodiversity: Red Noise Plus Signal | |
| dc.type | text |