The document discusses how paleobiodiversity patterns have been analyzed over time by compiling data from various studies. Early studies in the 1800s generated simple diversity curves over geologic time. In the 1970s, David Raup recognized potential biases in these curves from uneven sampling. Recent work has addressed this using two approaches: 1) subsampling large datasets to compensate for uneven sampling, and 2) building models to estimate diversity based on various proxies. A diversity of studies on specific fossil groups like dinosaurs, coccolithophores, and fishes are summarized, showing how analyses have progressed from simple global curves to more rigorous examinations of biases by compiling extensive fossil occurrence data.
5. How did life get so diverse?
Last
Universal
Common
Ancestor
?
6. How did life get so diverse?
Last
Universal
Common
Ancestor
7. Extant vs. fossil record
Red – lineage through time plot based
on extant data only
Navy – lineage through time plot
based on fossil data
Ezard et al. 2011
14. The consensus paper
Median trace fossil Dolf Seilacher
assemblage richness
Species richness David Raup
(Zoological record data)
Median open-marine Richard Bambach
community species richness
David Raup
Genus diversity
Jack Sepkoski
Family diversity
Sepkoski et al. 1981
15. 2000s: a the data –early solutions
Collating return to Raup’s curves
Alroy et al. 2001 Peters and Foote 2001
16. 2000s: a the data –early solutions
Collating return to Raup’s curves
Alroy et al. 2001 Peters and Foote 2001
58. Acknowledgements
Collating the data –early curves
Michael Steve Katie Matt Dave Rachel
Benton Brusatte Davis Friedman Hone Jennings
Davide Paul Marcello Manabu Andrew James Jeremy
Pisani Pearson Ruta Sakamot Smith Tarver Young
o
59. Fishes – the data –early curves
Collating bone vs. cartilage
Lloyd and Friedman, submitted