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age-and-area hypothesis
age-and-area hypothesis J. C. Willis suggested in 1922 that, all other things being equal, the area occupied by a taxon is directly proportional to the age of that taxon. Thus in a polytypic genus, the species with the smallest area of distribution would be the youngest in the genus. However, things are rarely ever equal, and Willis's ideas, though much discussed, have never gained acceptance as a law or rule.
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MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O7-ageandareahypothesis.html MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Plant Sciences. 1998. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-ageandareahypothesis.html |
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age-and-area hypothesis
age-and-area hypothesis The idea (suggested by J. C. Willis in 1922) that, all other things being equal, the area occupied by a taxon is directly proportional to the age of that taxon. Thus in a polytypic genus, the species with the smallest area of distribution would be the youngest in the genus. However, other things rarely are equal, and the idea has never gained acceptance as a law or rule.
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MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-ageandareahypothesis.html MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-ageandareahypothesis.html |
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age-and-area hypothesis
age-and-area hypothesis The idea that, all other things being equal, the area occupied by a taxon is directly proportional to the age of that taxon. Thus in a polytypic genus, the species with the smallest area of distribution would be the youngest in the genus. However, other things rarely are equal, and the idea has never gained acceptance as a law or rule.
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Cite this article
MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Zoology. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Zoology. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O8-ageandareahypothesis.html MICHAEL ALLABY. "age-and-area hypothesis." A Dictionary of Zoology. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-ageandareahypothesis.html |
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