Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-03T00:55:43.221Z Has data issue: false hasContentIssue false
  • English
  • Français

Phenology of morphologic change in radiolarian lineages from deep-sea cores: implications for macroevolution

Published online by Cambridge University Press:  08 April 2016

Davida E. Kellogg
Davida E. Kellogg*
Affiliation:
Institute for Quaternary Studies and Department of Geological Sciences, University of Maine at Orono, Orono, Maine 04469
Get access Rights & Permissions [Opens in a new window]

Abstract

One method of increasing the resolving power of paleontological inquiries is to assess the time distribution, or phenology, of perispeciational change. The rationale for this test is that, while concentration of morphologic change around the time of speciation is consistent with both known microevolutionary mechanisms and punctuated equilibria, punctuated equilibrium theory presupposes that most of the change occurs either before or during initial allopatry to produce morphologically static taxa. Considerable change in the initial phases of speciation could also result from known microevolutionary mechanisms, but if significant change occurs in the neosympatric phase, or at any time after the species have become differentiated, then that change is best explained by known microevolutionary mechanisms.

Amount and rate of morphologic change during each phase of the allopatric speciation process were determined for two cognate species of the radiolarian genus Eucyrtidium. In this case, morphologic change accruing to these species during the neosympatric phase was 2-3 times as great as that which occurred during the initial allopatric phase. Morphologic trends in both these species during the allopatric phase differed significantly from a random walk. The size differential that characterized this speciation event was not the product of a single large step early in the process but of a disproportionate number of small steps in one direction during neosympatry. Therefore, the hypothesis of no statistically significant change following the “first stage” of speciation, which is a major tenet of punctuated equilibrium theory, is falsified for this case.

Type
Articles
Information
Paleobiology , Volume 9 , Issue 4 , Fall 1983 , pp. 355 - 362
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Arnold, A. J. 1982. Techniques for biometric analysis of Foraminifera. Proc. 3d No. Am. Paleontol. Conv. 1:13–15.Google Scholar
Bock, W. J. 1970. Microevolutionary sequences as a fundamental concept in macroevolutionary models. Evolution. 24:704–722.Google Scholar
Bock, W. J. 1972. Species interactions and macroevolution. Pp. 1–24. In: Dobzhansky, T., Hecht, M. K., and Steere, W. C., eds. Evolutionary Biology 5. Appleton-Century-Crofts; New York.Google Scholar
Bock, W. J. 1977. Foundations and methods of evolutionary classification. Pp. 851–895. In: Hecht, M., ed. Major Patterns in Vertebrate Evolution. NATO Advanced Study Inst., Ser. A. Vol. 14.Google Scholar
Bock, W. J. 1979. The synthetic explanation of macroevolutionary change—a reductionistic approach. Bull. Carnegie Mus. Nat. Hist. 13:20–69.Google Scholar
Boucot, A. J. 1982. Ecophenotypic or genotypic? Nature. 296:609.Google Scholar
Eldredge, N. 1971. The allopatric model and phylogeny in Paleozoic invertebrates. Evolution. 25:156–167.Google Scholar
Eldredge, N. and Gould, S. J. 1972. Punctuated equilibria: an alternative to phyletic gradualism. Pp. 82–115. In: Schopf, T. J. M., ed. Models in Paleobiology. Freeman, Cooper & Co.; San Francisco.Google Scholar
Gould, S. J. and Eldredge, N. 1977. Punctuated equilibria: the tempo and mode of evolution reconsidered. Paleobiology. 3:115–151.Google Scholar
Hays, J. D. 1970. Stratigraphy and evolutionary trends of Radiolaria in North Pacific deep-sea sediments. In: Hays, J. D., ed. Geological Investigations of the North Pacific. Geol. Soc. Am. Mem. 126:185–218.Google Scholar
Kellogg, D. E. 1976. Character displacement in the radiolarian genus Eucyrtidium. Evolution. 29:736–749.Google Scholar
Lack, D. 1944. Ecological aspects of species formation in passerine birds. Ibis. 86:260–268.Google Scholar
Lack, D. 1947. Darwin's Finches. Cambridge Univ. Press; Cambridge.Google Scholar
Levinton, J. S. 1982. Estimating stasis: can a null hypothesis be too null? Paleobiology. 8:307.Google Scholar
Lindsay, D. W. 1982. Punctuated equilibria and punctuated environments. Nature. 296:611.Google Scholar
Malmgren, B. A. and Kennett, J. P. 1981. Phyletic gradualism in a Late Cenozoic planktonic foraminiferal lineage: DSDP Site 284, southwest Pacific. Paleobiology. 7:230–240.Google Scholar
Raup, D. M. and Crick, R. E. 1981. Evolution of single characters in the Jurassic ammonite Kosmoceras. Paleobiology. 7:200–215.Google Scholar
Raup, D. M. and Schopf, T. J. M. 1978. Stochastic models in paleontology: a primer. 124 pp. Prepared for the workshop, “Species as Particles in Space and Time.”U.S. Natl. Mus. Smithsonian Inst., June 5-16, 1978.Google Scholar
Rightmire, G. P. 1981. Patterns in the evolution of Homo erectus. Paleobiology. 7:241–246.Google Scholar
Scott, G. H. 1982. Tempo and stratigraphic record of speciation in Globorotalia puncticulata. J. Foraminiferal Res. 12:1–12.Google Scholar
Shackleton, N. J. and Opdyke, N. D. 1976. Oxygen isotope and paleomagnetic stratigraphy of Pacific core V28-239: Late Pliocene to Latest Pleistocene. In: Cline, R. M. and Hays, J. D., eds. Investigation of Late Quaternary Paleoceanography and Paleoclimatology. Geol. Soc. Am. Mem. 145:449–464.Google Scholar
Simpson, G. G. 1949. The Meaning of Evolution. Yale Univ. Press; New Haven, Conn.Google Scholar
Williamson, P. G. 1981. Palaeontological documentation of speciation in Cenozoic molluscs from Turkana Basin. Nature. 293:437–443.Google Scholar
Williamson, P. G. 1982a. Molluscan biostratigraphy of the Koobi Fora hominid-bearing deposits. Nature. 295:140–142.Google Scholar
Williamson, P. G. 1982b. Williamson replies. Nature. 296:611–612.Google Scholar