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Quaternary palaeoclimatology, neotropical diversity and potential effects of global warming

Rull, Valenti; Vegas-Vilarrúbia, Teresa; Nogué Bosch, Sandra; Montoya Romo, Encarnación; Cañellas, N. and Lara, A. (2007). Quaternary palaeoclimatology, neotropical diversity and potential effects of global warming. Contributions to Science, 3(3) pp. 405–413.

URL: http://revistes.iec.cat/index.php/CtS/article/view...
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Abstract

The Quaternary paleoclimatic trends documented for the Northern Hemisphere also affected the neotropical region, and contributed to the shaping of its present-day biodiversity patterns. DNA molecular-clock studies on extant neotropical species have recorded a significant acceleration of speciation rates in the last 5 million years (my), coinciding with a marked Plio-Pleistocene global cooling. Furthermore, around half of the species studied originated during the last 2.6 my, in the frame of Pleistocene glaciations. The refuge hypothesis is considered inadequate for the Neotropics, and alternative diversification mechanisms linked to climate change are discussed herein. Among them, recurrent vertical migrations controlled by alternating glacial/interglacial climates, and the resulting connection and disconnection of lowland and highland biotas, have been considered important speciation factors. A significant number of endemic taxa from the neotropical highlands is potentially threatened of extinction by habitat loss/fragmentation, due to the global warming predicted by the end of the present century.

Item Type: Journal Item
Copyright Holders: 2007 Institut d'Estudis Catalans
ISSN: 2013-410X
Extra Information: Paleoclimatology research in Catalonia : special issue / A. Rosell-Melé, guest editor
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
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Item ID: 35720
Depositing User: Encarnacion Montoya Romo
Date Deposited: 05 Jun 2013 13:53
Last Modified: 07 Dec 2018 10:11
URI: http://oro.open.ac.uk/id/eprint/35720
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