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      RAPID EVOLUTION OF AN INVASIVE PLANT

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      Ecological Monographs

      Wiley-Blackwell

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          Most cited references 43

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          Evolutionary genetics of invasive species

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            Evaluation of the Rate of Evolution in Natural Populations of Guppies (Poecilia reticulata)

            Natural populations of guppies were subjected to an episode of directional selection that mimicked natural processes. The resulting rate of evolution of age and size at maturity was similar to rates typically obtained for traits subjected to artificial selection in laboratory settings and up to seven orders of magnitude greater than rates inferred from the paleontological record. Male traits evolved more rapidly than female traits largely because males had more genetic variation upon which natural selection could act. These results are considered in light of the ongoing debate about the importance of natural selection versus other processes in the paleontological record of evolution.
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              Rapid evolution of a geographic cline in size in an introduced fly.

              The introduction and rapid spread of Drosophila subobscura in the New World two decades ago provide an opportunity to determine the predictability and rate of evolution of a geographic cline. In ancestral Old World populations, wing length increases clinally with latitude. In North American populations, no wing length cline was detected one decade after the introduction. After two decades, however, a cline has evolved and largely converged on the ancestral cline. The rate of morphological evolution on a continental scale is very fast, relative even to rates measured within local populations. Nevertheless, different wing sections dominate the New versus Old World clines. Thus, the evolution of geographic variation in wing length has been predictable, but the means by which the cline is achieved is contingent.
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                Author and article information

                Journal
                Ecological Monographs
                Ecological Monographs
                Wiley-Blackwell
                0012-9615
                May 2004
                May 2004
                : 74
                : 2
                : 261-280
                Article
                10.1890/03-4027
                © 2004
                Product
                Self URI (article page): http://doi.wiley.com/10.1890/03-4027

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