Are reptile and amphibian species younger in the Northern Hemisphere than in the Southern Hemisphere?

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چکیده

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Are reptile and amphibian species younger in the Northern Hemisphere than in the Southern Hemisphere?

A previous analysis of molecular phylogenies suggested that intraspecific diversification had occurred more recently in temperate-zone Northern Hemisphere reptiles and amphibians than in Southern Hemisphere taxa. Here, we test potential explanations for this pattern. We examined published phylogenetic analyses, derived from genetic sequence data, to generate two estimates of the age of species:...

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Geographic variation in the age of temperate-zone reptile and amphibian species: Southern Hemisphere species are older.

Despite controversy over alternative definitions, the species is the fundamental operational unit of biodiversity, and species are the building-blocks of conservation. But is a 'species' from one part of the world the same as a 'species' from elsewhere? Our meta-analysis of molecular phylogenetic data reveals that reptile and amphibian species distributed in temperate-zone areas of the Northern...

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Croll Revisited : 1 Why is the Northern Hemisphere Warmer than 2 the Southern Hemisphere ?

7 The question of why, in the annual-mean, the Northern Hemisphere (NH) is warmer than 8 the Southern Hemisphere (SH) is addressed, revisiting an 1870 paper by James Croll. We 9 first show that ocean is warmer than land in general which, acting alone, would make the 10 SH, with greater ocean fraction, warmer. Croll was aware of this and thought it was caused 11 by greater specific humidity and ...

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ژورنال

عنوان ژورنال: Journal of Evolutionary Biology

سال: 2011

ISSN: 1010-061X

DOI: 10.1111/j.1420-9101.2011.02417.x