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Adaptive differentiation following experimental island colonization in Anolis lizards


If colonizing populations are displaced into an environment that is often very different from that of their source1, they are particularly likely to diverge evolutionarily, the more so because they are usually small and thus likely to change by genetic restructuring or drift2,3. Despite its fundamental importance, the consequence of colonization for traits of founding populations have primarily been surmised from static present-day distributions1,2,4,5, laboratory experiments6 and the outcomes of haphazard human introductions7–9, rather than from replicated field experiments. Here we report long-term results of just such an experimental study. Populations of the lizard Anolis sagrei, introduced onto small islands from a nearby source, differentiated from each other rapidly over a 10–14-year period. The more different the recipient island's vegetation from that of the source, the greater the magnitude of differentiation. Further, the direction of differentiation followed an expectation based on the evolutionary diversification of insular Anolis over its entire geographic range. In addition to providing a glimpse of adaptive dynamics in one of the most extensive generic radiations on earth, the results lend support to the general argument that environment determines the evolution of morphology.

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  1. Carlquist, S. Island Biology (Columbia Univ. Press, New York, 1974).

    Book  Google Scholar 

  2. Carson, H. L. & Templeton, A. R. Genetic revolutions in relation to speciation phenomena: the founding of new populations. Ann. Rev. Ecol. Syst. 15, 97–131 (1984).

    Article  Google Scholar 

  3. Templeton, A. R. The theory of speciation via the founder principle. Genetics 94, 1011–1038 (1980).

    CAS  PubMed  PubMed Central  Google Scholar 

  4. Darlington, P. J. Zoogeography: the Geographical Distribution of Animals (Wiley, New York, 1957).

    Google Scholar 

  5. Williams, E. E. The ecology of colonization as seen in the zoogeography of anoline lizards on small islands. Q. Rev. Biol. 44, 345–389 (1969).

    Article  Google Scholar 

  6. Templeton, A. R. Experimental evidence for the genetic-transilience model of speciation. Evolution 50, 909–915 (1996).

    Article  PubMed  Google Scholar 

  7. Baker, A. J. Genetic and morphometric divergence in ancestral European and descendant New Zealand populations of chaffinches (Fringilla coelebs). Evolution 46, 1794–1800 (1992).

    Google Scholar 

  8. St Louis, V. L. & Barlow, J. C. Morphornetric analyses of introduced and ancestral populations of the Eurasian tree sparrow. Wilson Bull. 103, 1–12 (1991).

    Google Scholar 

  9. Johnston, R. F. & Selander, R. K. Evolution in the house sparrow II. Adaptive differentiation in North American populations. Evolution 25, 1–28 (1971).

    Article  PubMed  Google Scholar 

  10. Schoener, T. W. & Schoener, A. The time to extinction of a colonizing propagule of lizards increases with island area. Nature 302, 332–334 (1983).

    Article  ADS  Google Scholar 

  11. Coker, W. C. in The Bahatua Islands (ed. Shattuck, G. B.) 185–270 (MacMillan, New York,1905).

  12. Losos, J. B., Irschick, D. J. & Schoener, T. W. Adaptation and constraint in the evolution of specialization of Bahamian Anolis lizards. Evolution 48, 1786–1798 (1994).

    Article  PubMed  Google Scholar 

  13. Losos, J. B. & Irschick, D. J. The effect of perch diameter on escape behaviour of Anolis lizards: laboratory predictions and field tests. Anim. Behav. 51, 593–602 (1996).

    Article  Google Scholar 

  14. Gingerich, P. D. Rates of evolution: effects of time and temporal scaling. Science 222, 159–161 (1983).

    Article  ADS  CAS  PubMed  Google Scholar 

  15. Williams, E. E. in Lizard Ecology: Studies of a Model Organism (eds Huey, R. B., Pianka, E. R. & Schoener, T. W.) 326–370 (Harvard Univ. Press. Cambridge, MA, 1983).

    Google Scholar 

  16. Patton, J. L. & Brylski, P. V. Pocket gophers in alfalfa fields: causes and consequences of habitat- related body size variation. Am. Nat. 130, 493–506 (1988).

    Article  Google Scholar 

  17. Robinson, B. W. & Wilson, D. S. Experimentally induced morphological diversity in Trinidadian guppies (Poecilia reticulata). Copeia 1995, 294–305 (1995).

    Article  Google Scholar 

  18. Woo, S. L. -Y. et al. The effect of prolonged physical training on the properties of long bone: a study of Wolff's Law. J. Bone Joint Surg. 63-A, 780–786 (1981).

    Article  Google Scholar 

  19. Loitz, B. J. & Zernicke, R. F. Strenuous exercise-induced remodelling of mature bone: relationships between in vivo strains and bone mechanics. J. Exp. Biol. 170, 1–18 (1992).

    CAS  PubMed  Google Scholar 

  20. Kiiskinen, A. Physical training and connective tissues in young mice: physical properties of achilles tendons and long bones. Growth 41, 123–137 (1977).

    CAS  PubMed  Google Scholar 

  21. Schmalhausen, I. I. Factors of Evolution (Blakiston, Philadelphia, PA, 1949).

    Google Scholar 

  22. Huxley, J. Evolution: the Modern Synthesis (Harper, New York, 1942).

    Google Scholar 

  23. Waddington, C. H. The Evolution of an Evolutionist (Columbia Univ. Press, New York, 1975).

    Google Scholar 

  24. West-Eberhard, M. J. Phenotypic plasticity and the origins of diversity, Ann. Rev. Ecol. Syst. 20, 249–278 (1989).

    Article  Google Scholar 

  25. Schoener, T. W. in Community Ecology (eds Diamond, J. & Case, T. J.) 556–586 (Harper and Row, New York, 1986).

    Google Scholar 

  26. Bookstein, F. L. "Size and shape": a comment on semantics. Syst. Zool. 38, 173–180 (1989).

    Article  Google Scholar 

  27. Bookstein, F. L. et al.(eds) Morphornetrics in Evolutionary Biology (Acad. Natl Sci., Philadelphia, PA, 1985).

    Google Scholar 

  28. Rohlf, F.J & Bookstein, F. L. A comment on shearing as a method of "size correction". Syst. Zool. 36, 356–367 (1987).

    Article  Google Scholar 

  29. Stamps, J. A., Krishnan, V. V. & Andrews, R. M. Analyses of sexual size dimorphism using null growthbased models. Copeia 1994, 598–613 (1994).

    Article  Google Scholar 

  30. Burnaby, T. P. Growth-invariant discriminant functions and generalized distances. Biometrics 22, 96–110 (1966).

    Article  MathSciNet  Google Scholar 

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Losos, J., Warheitt, K. & Schoener, T. Adaptive differentiation following experimental island colonization in Anolis lizards. Nature 387, 70–73 (1997).

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