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2 resultados encontrados para: AUTOR: Martínez Salas, Esteban
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1.
Artículo
*En hemeroteca, SIBE-Chetumal
Protecting a single endangered species and meeting multiple conservation goals: an approach with Guaiacum sanctum in Yucatan Peninsula, Mexico
López Toledo, Leonel ; Ibarra Manríquez, Guillermo (coaut.) ; Burslem, David F. R. P. (coaut.) ; Martínez Salas, Esteban (coaut.) ; Pineda García, Fernando (coaut.) ; Martínez Ramos, Miguel (coaut.) ;
Contenido en: Diversity and Distributions Vol. 18, no. 5-6 (May-June 2012), p. 575-587 ISSN: 1366-9516
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
51645-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal
Resumen en: Inglés |
Resumen en inglés

Aim new protected areas should consider safeguarding high conservation value sites based on multiple criteria and not just the presence of a single endangered or charismatic species. However, the extent to which complementary criteria coincide is usually unknown. We use the case of Guaiacum sanctum (Zygopyllaceae), an endangered timber tree species, to explore whether the protection of forests where this species is most abundant would meet other complementary conservation goals, such as capturing regional plant biodiversity, protecting other threatened endemic species or safeguarding ecosystem services.


2.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Forest fragmentation reduces recruitment of large-seeded tree species in a semi-deciduous tropical forest of southern Mexico
Melo, Felipe P. L. ; Martínez Salas, Esteban (coaut.) ; Benítez Malvido, Julieta (coaut.) ; Ceballos, Gerardo (coaut.) ;
Contenido en: Journal of Tropical Ecology Vol. 26, part 1 (January 2010), p. 35-43 ISSN: 0266-4674
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
49286-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en: Inglés |
Resumen en inglés

This study tested whether the reduction in the number of large-bodied seed dispersers is correlated with shifts in the taxonomic and functional (e.g. dispersal mode and seed size) traits of the seeding communities within small fragments of semi-deciduous forest, southern Mexico. In five fragments (2.3–640 ha) and one continuous forest site we sampled tree and seedling species in 40 (20 × 20 m) and 120 (3 × 3 m) plots respectively, and recorded the incidence (presence/absence) of the disperser fauna (three common large-birds and >500-g mammals). Tree and seedling species were categorized according to dispersal mode, seed size and whether they originated from local (i.e. from dropped) or immigrant (i.e. from actively dispersed) seeds. Fragment size negatively correlated with number of species of medium to large vertebrate seed-dispersers and number of seedlings of large-seeded species, but had no influence on functional traits of the adult-tree community. Between 41% and 61% of all seedlings were considered as immigrants and the proportion of immigrant seedlings of large-seeded tree species was negatively correlated with forest size. The results suggest that biased defaunation in small forest fragments may seriously reduce recruitment of large-seeded tree species (>1.4 cm length) dispersed by vertebrates, negatively affecting successional trajectories of small forest fragments.