| Título: | Is geographical rarity frequent among the cacti of the Chihuahuan Desert? |
| Autores: |
Hernández,Héctor M. Gómez-Hinostrosa,Carlos Hoffmann,Gibrán |
| Fecha: | 2010-04-01 |
| Publicador: | SCIELO |
| Fuente: |
 |
| Tipo: | journal article |
| Tema: |
areas of occupancy cacti Chihuahuan Desert distribution size Mexico IUCN Red List |
| Descripción: | With the aim of assessing the extent of geographical rarity of Mexican Cactaceae, we calculated the distribution size (area of occupancy) of 142 species from the Chihuahuan Desert. In addition, using 2 variables (number of localities and range size), we preliminarily assessed their conservation status using the current IUCN Red List criteria. The results showed enormous variation in the areas of occupancy, although from the biogeographic and conservation perspective the most exceptional group comprises the extremely narrow endemics (42 species), whose range is restricted to areas smaller than 10 km2. Our results reinforce the reputation of this plant family as exceptionally rare geographically. We suggest that geographical rarity of Cactaceae in the Chihuahuan Desert is a natural phenomenon; however, we propose that the range of several species has been influenced by human activities. Regarding the conservation status of the species, 75 of them are categorized as Least concern. The remaining 67 species (47.2%) fall in 1 of the 3 categories of threat (27 Vulnerable, 11 Endangered, and 29 Critically endangered). These figures confirm the critical conservation status of Mexican Cactaceae. |
| Idioma: | Inglés |
1 | 6 Fracturas maxilofaciales y factores asociados en derechohabientes del IMSS Campeche, México: Análisis retrospectivo 1994-1999 por Medina-Solis,Cario Eduardo,Córdova-González,José Luis,Casanova-Rosado,Alejandro José,Zazueta-Hernández,Maria Alejandra |
2 | 7 Factores de riesgo de mortalidad en el hijo de madre toxémica por Gómez-Gómez,Manuel,Danglot-Banck,Cecilia,García-de la Torre,Guadalupe Silvia,Antonio-Ocampo,Abdiel,Fajardo-Gutiérrez,Arturo,Sánchez-García,Maria Luisa,Ahumada-Ramírez,Elias |
3 Cerámicas mexicanas para cicatrización de piel por Piña-Barba,María Cristina,Tejeda-Cruz,Adriana,Regalado-Hernández,Miguel Ángel,Arenas-Reyes,María Isabel,Martín-Mandujano,Salvador,Montalvo,César | 8 I. De la enseñanza tutoral al aprendizaje a distancia por Cravioto,Alejandro |
4 Seguimiento de egresados de un diplomado en enseñanza de la Medicina por Ponce de León-Castañeda,Ma. Eugenia,Ruíz-Alcocer,Ma. del Carmen,Lozano-Sánchez,J. Rogelio | 9 II. La vocación científica: compromisos con el cambio permanente y la educación continua por Kretschmer,Roberto |
5 Primer estudio de teledermatología en México: Una nueva herramienta de salud pública por Lepe,Verónica,Moneada,Benjamín,Castanedo-Cázares,Juan Pablo,Martínez-Rodríguez,Alejandra,Mercado-Ceja,Sergio M,Gordillo-Moscoso,Antonio | 10 |