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3 resultados encontrados para: AUTOR: Búrquez, Alberto
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High proportion of cactus species threatened with extinction
Goettsch, Bárbara ; Hilton Taylor, Craig (coaut.) ; Cruz Piñón, Gabriela (coaut.) ; Duffy, James P. (coaut.) ; Frances, Anne (coaut.) ; Hernández, Héctor M. (coaut.) ; Inger, Richard (coaut.) ; Pollock, Caroline (coaut.) ; Schipper, Jan (coaut.) ; Superina, Mariella (coaut.) ; Taylor, Nigel P. (coaut.) ; Tognelli, Marcelo (coaut.) ; Abba, Agustín M. (coaut.) ; Arias, Salvador (coaut.) ; Arreola Nava, Hilda J. (coaut.) ; Baker, Marc A. (coaut.) ; Bárcenas, Rolando T. (coaut.) ; Barrios, Duniel (coaut.) ; Braun, Pierre (coaut.) ; Butterworth, Charles A. (coaut.) ; Búrquez, Alberto (coaut.) ; Caceres, Fátima (coaut.) ; Cházaro Basáñez, Miguel de Jesús (coaut.) ; Corral Díaz, Rafael (coaut.) ; Valle Perea, Mario del (coaut.) ; Demaio, Pablo H. (coaut.) ; Duarte de Barros, Williams A. (coaut.) ; Durán García, Rafael (coaut.) ; Faúndez Yancas, Luis (coaut.) ; Felger, Richard S. (coaut.) ; Fitz Maurice, Betty (coaut.) ; Fitz Maurice, Walter A. (coaut.) ; Gann, George (coaut.) ; Gómez Hinostrosa, Carlos (coaut.) ; Gonzales Torres, Luis R. (coaut.) ; Griffith, M. Patrick (coaut.) ; Guerrero, Pablo C. (coaut.) ; Hammel, Barry (coaut.) ; Heil, Kenneth D. (coaut.) ; Hernández Oria, José Guadalupe (coaut.) ; Hoffmann, Michael (coaut.) ; Ishiki Ishihara, Mario (coaut.) ; Kiesling, Roberto (coaut.) ; Larocca, João (coaut.) ; León de la Luz, José Luis (coaut.) ; Loaiza S., Christian R. (coaut.) ;
Contenido en: Nature Plants No. 15142 (October 2015) ISSN: 2055-0278
Resumen en: Inglés |
Resumen en inglés

A high proportion of plant species is predicted to be threatened with extinction in the near future. However, the threat status of only a small number has been evaluated compared with key animal groups, rendering the magnitude and nature of the risks plants face unclear. Here we report the results of a global species assessment for the largest plant taxon evaluated to date under the International Union for Conservation of Nature (IUCN) Red List Categories and Criteria, the iconic Cactaceae (cacti). We show that cacti are among the most threatened taxonomic groups assessed to date, with 31% of the 1,478 evaluated species threatened, demonstrating the high anthropogenic pressures on biodiversity in arid lands. The distribution of threatened species and the predominant threatening processes and drivers are different to those described for other taxa. The most significant threat processes comprise land conversion to agriculture and aquaculture, collection as biological resources, and residential and commercial development. The dominant drivers of extinction risk are the unscrupulous collection of live plants and seeds for horticultural trade and private ornamental collections, smallholder livestock ranching and smallholder annual agriculture. Our findings demonstrate that global species assessments are readily achievable for major groups of plants with relatively moderate resources, and highlight different conservation priorities and actions to those derived from species assessments of key animal groups.

Resumen en: Inglés |
Resumen en inglés

Mexico harbors more than 10% of the planet’s endemic species. However, the integrity and biodiversity of many ecosystems is experiencing rapid transformation under the influence of a wide array of human and natural disturbances. In order to disentangle the effects of human and natural disturbance regimes at different spatial and temporal scales, we selected six terrestrial (temperate montane forests, montane cloud forests, tropical rain forests, tropical semi-deciduous forests, tropical dry forests, and deserts) and four aquatic (coral reefs, mangrove forests, kelp forests and saline lakes) ecosystems. We used semi-quantitative statistical methods to assess (1) the most important agents of disturbance affecting the ecosystems, (2) the vulnerability of each ecosystem to anthropogenic and natural disturbance, and (3) the differences in ecosystem disturbance regimes and their resilience. Our analysis indicates a significant variation in ecological responses, recovery capacity, and resilience among ecosystems. The constant and widespread presence of human impacts on both terrestrial and aquatic ecosystems is reflected either in reduced area coverage for most systems, or reduced productivity and biodiversity, particularly in the case of fragile ecosystems (e.g., rain forests, coral reefs). In all cases, the interaction between historical human impacts and episodic high intensity natural disturbance (e.g., hurricanes, fires) has triggered a reduction in species diversity and induced significant changes in habitat distribution or species dominance. The lack of monitoring programs assessing before/after effects of major disturbances in Mexico is one of the major limitations to quantifying the commonalities and differences of disturbance effects on ecosystem properties.

Guías botánicas de excursiones en México: volumen IV / José Miguel Medina, Jerzy Rzedowski, Miguel Franco y Alberto Búrquez
Medina, José Miguel ; Rzedowski, Jerzy (coaut.) ; Franco, Miguel (coaut.) ; Búrquez, Alberto (coaut.) ;
Distrito Federal, México : Sociedad Botánica de México , 1981
Clasificación: F/581.972 / G8
Bibliotecas: Campeche
SIBE Campeche
ECO040004549 (Disponible)
Disponibles para prestamo: 1

Guía botánico forestal de la parte alta de la Sierra de Pachuca
Guía botánico ecológica del Parque Nacional Zoquiapan