Reassessment of the extinction risk of five species of the genus Polianthes L. (Agavaceae)
Por:
Feria-Arroyo, TP, Solano, E, Garcia-Mendoza, A
Publicada:
1 ene 2010
Resumen:
We reassessed the extinction risk of the species Polianthes densiflora, P. howardii, P. longiflora, P. palustris and P. platyphylla by applying the MER (method of evaluation of extinction risk of wild species for Mexico). These species are listed as rare by the International Union for Conservation of Nature (IUCN) and are considered to be in the category of special protection according to Mexican regulation. MER criterion A (geographic distribution) was assessed with three methods: area of occupancy, extent of ocurrence, and species distribution models. Criteria B (habitat conditions) and D (impact of human activity) were examined by superimposing the human footprint map of Sanderson et al., where values range from 0 to 100. In this map, 0-10 denote pristine areas and 100 indicates that the habitat has been completely transformed. Criterion C (intrinsic biological vulnerability) was assigned based on the geophytic nature of the species. According to our findings, Polianthes densiflora
Filiaciones:
Feria-Arroyo, TP:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Unidad Invest Sistemat Vegetal & Suelo, Herbario FEZA, Iztapalapa 09230, Mexico
Univ Texas Pan Amer, Dept Biol, Lab Landscape Ecol, Edinburg, TX 78541 USA
Solano, E:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Unidad Invest Sistemat Vegetal & Suelo, Herbario FEZA, Iztapalapa 09230, Mexico
Garcia-Mendoza, A:
Univ Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, Mexico
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