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Evolutionary consequences of changes in species geographical distributions driven by Milankovitch climate oscillations
Umeå University, Faculty of Science and Technology, Ecology and Environmental Science.
Umeå University, Faculty of Science and Technology, Ecology and Environmental Science.
2000 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 97, 9115-9120 p.Article in journal (Refereed) Published
Abstract [en]

We suggest Milankovitch climate oscillations as a common cause for geographical patterns in species diversity, species' range sizes, polyploidy, and the degree of specialization and dispersability of organisms. Periodical changes in the orbit of the Earth cause climatic changes termed Milankovitch oscillations, leading to large changes in the size and location of species' geographical distributions. We name these recurrent changes ‘‘orbitally forced species' range dynamics'' (ORD). The magnitude of ORD varies in space and time. ORD decreases gradual speciation (attained by gradual changes over many generations), increases range sizes and the proportions of species formed by polyploidy and other ‘‘abrupt'' mechanisms, selects against specialization, and favor dispersability. Large ORD produces species prone neither to extinction nor gradual speciation. ORD increases with latitude. This produces latitudinal patterns, among them the gradient in species diversity and species' range sizes (Rapoport's rule). Differential ORD and its evolutionary consequences call for new conservation strategies on the regional to global scale.

Place, publisher, year, edition, pages
2000. Vol. 97, 9115-9120 p.
Identifiers
URN: urn:nbn:se:umu:diva-20824OAI: oai:DiVA.org:umu-20824DiVA: diva2:209674
Available from: 2009-03-26 Created: 2009-03-26 Last updated: 2017-12-13

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http://www.pnas.org/cgi/content/abstract/97/16/9115

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