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Geographic variation, speciation, and clines

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Published by Princeton University Press in Princeton, N.J .
Written in English

Subjects:

  • Clines,
  • Evolution (Biology)

Book details:

Edition Notes

StatementJohn A. Endler.
SeriesMonographs in population biology ;, 10
Classifications
LC ClassificationsQH409 .E5
The Physical Object
Paginationix, 246 p. :
Number of Pages246
ID Numbers
Open LibraryOL4901323M
ISBN 100691081875, 0691081921
LC Control Number76045896

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Geographic Variation, Speciation and Clines explores the origins and development of geographic variation, divergence, and speciation. In particular it is concerned with genetic divergence as it is usually found on continents, among groups of populations isolated only by distance. Although earlier writers on this topic considered the effects of geography and dispersal, intense geographic. Sep 21,  · Geographic Variation, Speciation and Clines explores the origins and development of geographic variation, divergence, and speciation. In particular it is concerned with genetic divergence as it is usually found on continents, among groups of populations isolated only by distance/5(2). Get this from a library! Geographic variation, speciation, and clines. [John A Endler] -- This book explores the origins and development of geographic variation, divergence, and speciation. In particular it is concerned with genetic divergence as it is usually found on continents, among. Jul 29,  · Geographic Variation, Speciation and Clines. (MPB) (Monographs in Population Biology) by John A. Endler () [John A. Endler] on 5/5(1).

Horizontally stepped clines, where intra-group variation is very small or non-existent and the geographic space separating groups shows a sharp change in character; Obliquely stepped clines, where there is some intra-group gradation, but this is less than the gradation in the character between populations; Clines and speciation. Speciation is the evolutionary process by which populations evolve to become distinct tonyasgaapartments.com biologist Orator F. Cook coined the term in for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his book On the Origin of Species. History of speciation. Jump to navigation Jump to search Moritz Wagner was the first to propose the concept of geographic speciation this extended to plants as well as animals with G. Ledyard Stebbins’s book, Variation and Evolution in Plants and the much later, book. Geographic Variation, Speciation and Clines explores the origins and development of geographic variation, divergence, and speciation. In particular it is concerned with genetic divergence as it is usually found on continents, among groups of populations isolated only by distance.

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. True speciation or splitting (cladogenetic; new RIM must evolve) Geographic speciation: Most speciation occurs geographically. Stages of geographic speciation: A species develops geographic variation over its range. Geographic barriers prevent contact between populations. Reproductive isolation may now evolve. Clines can arise for different reasons: • Natural selection favors a slightly different form along the gradient. • It can also arise if two forms are adapted to different environments separated in space and migration (gene flow) takes place between them. Geographic variation normally exists in the formof a continuous cline. _____ Geographic Clines in Genetic Variation Workshop Proceedings: Quantitative Techniques for Deriving National Scale Data The cline is steepest for the warmest climate and flattens out in the coldest climates. One can then describe clines like this on with regression models.