Rolshausen, G. Contemporary evolution of reproductive divergence in sympatry along a migratory divide. Current Biology. News articles: A summary of the blackcap research from Science News A summary of the finch research from Wired Understanding Evolution resources: A tutorial on the process of speciation A news story on speciation in cichlid fish A review of the process of natural selection Discussion and extension questions What evidence suggests that the Central European blackcap lineage is beginning to split?
What evidence suggests that the immigrant finch lineage may be on its way to forming a new species? Review the process of natural selection. Use the four steps described on that page to explain how the blackcaps migrating to Britain might have evolved rounder wings.
Read about the biological species concept and three other species concepts. For each concept, explain whether you think the two parts of the blackcap population constitute separate species by that definition. For each concept, explain whether you think the immigrant finch's lineage and the Daphne Major ground finches constitute separate species by that definition. Related lessons and teaching resources Teach about divergence and speciation : In this version of the bird beak activity for grades , students learn about how variation, habitat differences, and natural selection, can lead to adaptation and divergence.
Teach about speciation and biogeography : In this activity for grades , students "take a trip" to the Greater Antilles to figure out how the Anolis lizards on the islands might have evolved.
Teach about finch evolution : This news brief, for grades , celebrates Darwin's bicentennial by examining what we've learned about the evolution of the Galapagos finches since Darwin's time. References Grant, P. Huber, S. Proceedings of the Royal Society B. Lamichhaney, S. DOI: Milius, S. Some birds prefer northern winter. Science News. Meyer, P. Nosil, and J. View at: Google Scholar P. Sidos, M. Raymond, and T. Kawecki, N. Barton, and J.
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Dubois, P. Cheptou, C. Petit et al. Grahame, C. Wilding, and R. Coyne, H. Orr et al. Lande and D. Charlesworth, M. Morgan, and B. Uyenoyama and D. Kirkpatrick and M. Otto, M. Servedio, and S. Servedio and M. View at: Google Scholar H. Rundle and M. Otto and D.
Jiggins, R. Naisbit, R. Coe, and J. Kirkpatrick and S. Karlin and R. Wiener and M. View at: Google Scholar O. Roze and F. Hamiltion and R. Otto and T. Khan, D. Dinh, D. Schneider, R. Lenski, and T. Chou, H. Chiu, N. Delaney, D. Rokyta, P. Joyce, S. For example, genes associated with reproductive barriers may not pass species limits, whereas those that are neutral or confer adaptive benefits could.
Understanding the effects of gene flow and the patterns of divergence across different portions of the genome in recently diverged taxa is therefore directly relevant to elucidating the genetic basis of phenotypes relevant to speciation. Many of the current projects in our lab aim to understand avian diversification in the context of recent radiations, incipient species, hybrid zone dynamics and the maintenance of reproductive isolation.
Artificial selection works the same way as natural selection, except that with natural selection it is nature, not human interference, that makes these decisions. Charles Darwin and Alfred Wallace developed the idea of evolution through natural selection. But this idea was not accepted by scientists until more evidence came along.
Use this infographic to explore how Darwinism and genetics came together to explain what we know today about evolution. Join our community of educators and receive the latest information on National Geographic's resources for you and your students. Skip to content. Photograph by Ian Forsyth via Getty Images. Twitter Facebook Pinterest Google Classroom. Encyclopedic Entry Vocabulary. Media Credits The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.
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