A kinetic model of Phanerozoic taxonomic diversity. III. Post-Paleozoic families and mass extinctions

  title={A kinetic model of Phanerozoic taxonomic diversity. III. Post-Paleozoic families and mass extinctions},
  author={J John . Sepkoski},
  pages={246 - 267}
  • J. Sepkoski
  • Published 1 April 1984
  • Environmental Science, Geography
  • Paleobiology
A three-phase kinetic model with time-specific perturbations is used to describe large-scale patterns in the diversification of Phanerozoic marine families. The basic model assumes that the Cambrian, Paleozoic, and Modern evolutionary faunas each diversified logistically as a consequence of early exponential growth and of later slowing of growth as the ecosystems became filled; it also assumes interaction among the evolutionary faunas such that expansion of the combined diversities of all three… 

Post-extinction recovery of the Phanerozoic oceans and biodiversity hotspots

The fossil record of marine invertebrates has long fuelled the debate as to whether or not there are limits to global diversity in the sea1–5. Ecological theory states that, as diversity grows and

Evolutionary rates of a rapid radiation: The Paleogene planktic foraminifera

Population growth models of taxonomic radiations of clades from their origins have rarely been tested at the species level on an evolutionary time scale. The diversification of Paleogene planktic

Post-extinction recovery of the Phanerozoic oceans and the rise of biodiversity hotspots

The fossil record of marine invertebrates has long fueled the debate on whether or not there are limits to global diversity in the sea1–4⁠. Ecological theory states that as diversity grows and

The causes of Phanerozoic extinctions

Taxonomic Level as a Determinant of the Shape of the Phanerozoic Marine Biodiversity Curve

A species‐level model of global Phanerozoic marine diversification, constructed by extrapolation of the trends from familial to generic level, suggests growth in numbers of marine species was broadly exponential.

Modeling bivalve diversification: the effect of interaction on a macroevolutionary system

Results of this analysis suggest that interactions with other taxa have substantially affected bivalve global diversity through the Phanerozoic, particularly during the initial Ordovician radiation and following the Late Permian and Late Cretaceous mass extinctions.

Competitive displacement among post-Paleozoic cyclostome and cheilostome bryozoans

The microecological record of preserved competitive interactions between cyclostome and cheilostome bryozoans and the macroevolutionary record of global diversity are consistent in regard to competition as a significant influence on diversity histories of post-Paleozoic brysozoans.

Disparity Changes in 370 Ma Devonian Fossils: The Signature of Ecological Dynamics?

The present study aims at transferring a typical macro-evolutionary approach, namely disparity analysis, to the study of fine-scale evolutionary variations in order to decipher what processes actually drove the dynamics of diversity at a micro-evolved level.

Taxonomic evolution of Neogene planktonic foraminifera and paleoceanographic relations

The taxonomic evolution of Neogene (24 Ma to present day) planktonic foraminiferal species are described using four indices: rate of speciation, rate of extinction, rate of diversification, and rate

The Ordovician Radiation: A Follow-up to the Cambrian Explosion?1

Local and regional studies of Ordovician faunas reveal sharp transitions with timing and magnitudes that vary geographically, which suggest a more episodic and complex history than that revealed through synoptic global studies alone.



A kinetic model of Phanerozoic taxonomic diversity II. Early Phanerozoic families and multiple equilibria

  • J. Sepkoski
  • Environmental Science, Geography
  • 1979
The kinetic model of taxonomic diversity predicts that the long-term diversification of taxa within any large and essentially closed ecological system should approximate a logistic process controlled

A kinetic model of Phanerozoic taxonomic diversity I. Analysis of marine orders

  • J. Sepkoski
  • Environmental Science, Geography
  • 1978
This model appears to describe adequately the “explosive” diversification of known metazoan orders across the Precambrian-Cambrian Boundary, suggesting that no special event, other than the initial appearance of Metazoa, is necessary to explain this phenomenon.

Diversification, Faunal Change, and Community Replacement during the Ordovician Radiations

The Ordovician evolutionary radiations represent a major pivotal point in the history of life on earth. During the few tens of million years between the ends of the Cambrian and Ordovician Periods,

A factor analytic description of the Phanerozoic marine fossil record

  • J. Sepkoski
  • Geography, Environmental Science
  • 1981
Data on numbers of marine families within 91 metazoan classes known from the Phanerozoic fossil record are analyzed. The distribution of the 2800 fossil families among the classes is very uneven,

The end-Triassic bivalve extinction event

  • A. Hallam
  • Environmental Science, Geography
  • 1981

Dynamics of taxonomic diversity

It is proposed, although not assumed, that perturbation may include a degree of selectivity related to the dispersal abilities of organisms, thereby enhancing the observed asymmetry of the diversity response.

Species diversity in the Phanerozoic: an interpretation

  • D. Raup
  • Geology, Environmental Science
  • 1976
Species diversity among fossil invertebrates of the Phanerozoic is highly correlated with volume and area of sedimentary rocks. The correlations are statistically significant at the 1% level. The

Permo-Triassic extinction

  • F. Rhodes
  • Environmental Science, Geography
    Geological Society, London, Special Publications
  • 1967
The Permo-Triassic extinction of many fossil groups is one of the most striking events in the history of life: a ‘crisis in earth history’ which marked the end of an era. Major groups of organisms,