Pablo Ortega-Baes

Learn More
Sexual and asexual reproduction may occur simultaneously in some plant species. Under certain environmental conditions asexual reproduction is predominant, which generates ecological consequences on sexual fecundity. In this context, we studied the reproductive ecology of the creeping clonal cactus Echinopsis thelegona in La Bodega (Salta, Argentina), where(More)
The considerable floral diversity present in the cactus family has often been associated with the specificity of its pollinators. However, many cactus pollination systems are generalized as their flowers are pollinated by a wide spectrum of animals. For example, cactus species with white flowers, nocturnal anthesis and extended floral cycles would present(More)
A model was developed to assess how the seed rain and fire regime affect seed bank dynamics and seedling establishment of three native shrub species (Acanthostyles buniifolius, Baccharis pingraea and Baccharis dracunculifolia) with different regeneration strategies, in temperate South American savanna. Seed bank and seed rain were quantified for each(More)
The journal Cactáceas y Suculentas Mexicanas is a publication of the Mexican Society of Cactology, published since 1955. The articles are under the Creative Commons license. The journal Cactáceas y Suculentas Mexicanas is registered in the following indices: cab Abstracts, Periodica and Latindex. El costo de suscripción a la revista es de $400.00 para(More)
The journal Cactáceas y Suculentas Mexicanas is a publication of the Mexican Society of Cactology, published since 1955. The articles are under the Creative Commons license. The journal Cactáceas y Suculentas Mexicanas is registered in the following indices: cab Abstracts, Periodica and Latindex. El costo de suscripción a la revista es de $400.00 para(More)
North western Argentina, the southernmost portion of the tropical Andes, contains one of the main areas of endemism within the Southern Cone, as well as one of the main diversity hotspots of the country. Historically its reserve area systems have been located in the richest ecoregion of the area; the Southern Andean Yungas. We evaluated the effectiveness of(More)
In the papilionaceous flowers with explosive pollination mechanism, the androecium and the gynoecium are subjected to great pressure in the keel. It has been suggested that at the first visit nearly all pollen grains are released and that the floral parts do not return to their original positions; this would be a cue for pollinators to avoid activated(More)
  • 1