, Volume 18, Issue 2, pp 133–139 | Cite as

How many species?

  • Iberall A. S. 


Simpson's query (Evol., 1952) as to the number of species during earth's history is addressed once again. Some possible mechanistic contraints are put on the problem to distinguish the effects on species evolution from punctuate forces (geological selection pressure generated by buoyancy and tectonic processes) and from near continuous point mutation forces (selection pressure put on the gene pool from the local environment). That is, the long time scaling rate for the life process (its appearance and disappearance) perhaps can be accounted for feasibly by rather straightforward geophysical-geochemical processes.


Environmental Management Point Mutation Selection Pressure Gene Pool Local Environment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1).
    Raup, D.: Biological extinction in earth history. Science 231, 1528–1533 (1986)Google Scholar
  2. 2).
    Vail, P. et al.: Seismic stratigraphy and global changes of sea level. AAPG Memoir 26, 49–212 (1977)Google Scholar
  3. 2a).
    Vail, P.; Mitchum, R.: Global cycles of relative changes of sea level from seismic stratigraphy. AAPG Memoir 29, 467–472 (1979)Google Scholar
  4. 3).
    Simpson, G.: How many species? Evol. 6, 342 (1952)Google Scholar
  5. 4).
    Hart, M.: The evolution of the atmosphere of the earth. Icarus 33, 23 (1978)Google Scholar
  6. 5).
    Margulis, L.: Origin of Eukaryotic Cells. Yale Univ. Press, New Haven 1970.Google Scholar
  7. 5a).
    Margulis, L.: Symbiosis in Cell Evolution. Freeman and Co., San Francisco 1981.Google Scholar
  8. 6).
    Iberall, A.; Cardon, S.: Contributions to a thermodynamic model of earth systems — linking lithosphere, atmosphere, hydrosphere, geochemical field, biochemical field, civilization. NASA Contractors Reports, Contract NASW-3378, prepared by Gen. Tech. Serv. Inc. Upper Darby Pa.; May, Aug., Nov. 1980 Jan. 1981 for NASA-Washington.Google Scholar
  9. 7).
    Wood, R. M.: The fight between land and sea. New Sci. 87, 512–515 (1980)Google Scholar
  10. 8).
    Iberall, A.: Possible correlation between species extinction, evolution, and plate adjustment to continental erosion. GeoJournal 15, 4 (1987)Google Scholar
  11. 9).
    Gass, I.; Wright, J.: Continents old and new Nature 284, 217–218 (1980)Google Scholar
  12. 10).
    Iberall, A.; Soodak, H.: A physics for complex systems. In: Yates, F. E. (ed.), Self-Organizing Systems. Plenum Press, New York 1987.Google Scholar
  13. 11).
    Margulis, L.; Schwartz, K.: Five Kingdoms. Freeman and Co., San Francisco 1982.Google Scholar
  14. 12).
    Cailleux, A.: How many species? Evol. 8, 83–84 (1954)Google Scholar
  15. 13).
    Schopf, T.: A critical assessment of punctuated evolution. 1. Duration of taxa. Evol. 36, 1144–1147 (1982)Google Scholar
  16. 14).
    Simpson, G.: The Meaning of Evolution. Yale Univ. Press, New Haven, Conn 1967.Google Scholar
  17. 15).
    Rensch, B.: Evolution Above the Species Level. Columbia Univ. Press, New York 1960.Google Scholar
  18. 16).
    Robbins, E.; La Berge, G.; Schmidt, R.: Evidence for iron-stripping and silica-stripping micro Organismus in Precrambrian granular and banded iron formations. U.S. Geol. Survey Circ. 995, 58–59, 1981.Google Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Iberall A. S. 
    • 1
  1. 1.UCLALos AngelesUSA

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