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Historical relationships of the Mexican cloud forests: a preliminary vicariance model applying Parsimony Analysis of Endemicity to vascular plant taxa

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Abstract:

Summary

Mexican cloud forests, situated between 600 and 3000 m of elevation, exhibit a remarkable high biotic diversity. They follow a fragmented pattern, similar to that of an archipelago, that makes them suitable to vicariance modelling. A Parsimony Analysis of Endemicity (PAE) was applied to the presence/absence of 1267 species of vascular plants (gymnosperms, angiosperms, and pteridophytes) from twenty-four patches of Mexican cloud forests, in order to postulate a preliminary hypothesis of relationships. The single cladogram obtained grouped the twenty-four cloud forests into five clades. These results indicate that the Sierra Madre Oriental, Sierra Madre del Sur, and Serranías Meridionales floristic provinces do not represent natural units. A preliminary vicariance model is presented to explain the sequence of fragmentation of the Mexican cloud forests.

Keywords: Bosques mesófilos de montaña; Cloud forests; Mexico; México; biogeografía; biogeography; endemicity; endemismos; plantas vasculares; vascular plants

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1365-2699.1999.00361.x

Affiliations: 1: Herbario FCME, Departamento de Biología, Facultad de Ciencias, UNAM, Apartado Postal 70–399, México 04510, D.F., México, Email:, Email: ilv@hp.fciencias.unam.mx 2: Herbario de la Facultad de Estudios Superiores Zaragoza, UNAM, Av. Guelatao 66, Col. Ejército de Oriente, Iztapalapa, México 09230, D.F., México 3: Museo de Zoología ‘Alfonso L. Herrera’, Facultad de Ciencias, UNAM, Apartado Postal 70–399, México 04510, D.F., México

Publication date: November 1, 1999

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