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REFUGIO DE FITODIVERSIDAD EN LA CIUDAD DE MÉXICO, EL CASO DE LA CUENCA DEL RÍO MAGDALENA

V. Ávila-Akerberg, B. González-Hidalgo, M. Nava-López and L. Almeida-Leñero
Journal of the Botanical Research Institute of Texas
Vol. 2, No. 1 (24 JULY 2008), pp. 605-619
Stable URL: http://www.jstor.org/stable/41971679
Page Count: 15
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REFUGIO DE FITODIVERSIDAD EN LA CIUDAD DE MÉXICO, EL CASO DE LA CUENCA DEL RÍO MAGDALENA
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Abstract

La cuenca del río Magdalena, reconocida por contener uno de los últimos ríos vivos en el Distrito Federal, registra una fitodiversidad de 87 familias con 251 géneros y 487 especies. Las familias más importantes por número de géneros y especies son: Asteraceae, Poaceae, Lamiaceae, Caryophyllaceae y Rosaceae. Los géneros con mayor número de especies son Salvia (13), Ageratina (10), Pinas (8) y Quercus (7). Se registraron diez especies incluidas en la NOM-059-SEMARNAT-2001, siendo tres además endémicas: Acer negundo var. mexicanum, Furcraea bedinghausii, Dahlia scapigera y como indicadoras de perturbación Acaena elongata y Achillea millefolium. La riqueza de plantas de esta área, abarca ca. del 25% de la diversidad florística de la cuenca del valle de México, o el 2.2% del total de la flora del país. Por esto, la cuenca del río Magdalena debe ser considerada un refugio para la conservación de la biodiversidad, ya que es la base para el mantenimiento de los servicios ecosistémicos más importantes de la zona. The Magdalena River watershed, having one of the last living rivers of Mexico City, has a floristic diversity of 87 families, 251 genera, and 487 species. The most important plant families in terms of species and genera numbers are: Asteraceae, Poaceae, Lamiaceae, Caryophyllaceae, and Rosaceae. The genera with the most species are Salvia (13), Ageratina (10), Pinus (8), and Quercus (7). Ten plants included in the NOM-059-SEMARNAT-2001, the Mexican classification for endangered plant species, were recorded including three endemic species: Acer negundo var. mexicanum, Furcraea bedinghausii, Dahlia scapigera. Two species were recorded as disturbance indicators, Acaena elongata and Achillea millefolium. The plant species richness of this area represents ca. 25% of the total flora in the Valley of Mexico, and ca. 2.2% of the country's flora. Because of this, the Magdalena River watershed should be considered a conservation area of rich biodiversity. The watershed serves as the basis and the maintenance of the most important ecosystem services provided to the area.

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