Table 1.

List of regression models including various factors that may explain observed taxic diversity

Regression models (combinations of explanatory variables)
Stage duration [null model]
Stage duration+sampling*
Stage duration+shallow marine area
Stage duration+sampling*+shallow marine area
Stage duration+Lagerstätten+sampling*
Stage duration+Lagerstätten+shallow marine area
Stage duration+Lagerstätten+sampling*+shallow marine area
  • *Sampling is measured by a proxy, the number of fossiliferous marine formations.

  • Shallow marine area is measured by one of three proxies described in the text.