Los cloroplastos y el parénquima no lignificado en dos especies arbóreas pioneras del bosque tropical (Urticaceae).

Bryophyte diversity patterns in flooded and tierra firme forests in the Araracuara Region, Colombian Amazonia

We investigated patterns of bryophyte species richness and composition in two forest types of Colombian Amazonia, non-flooded tierra firme forest and floodplain forest of the Caquetá River. A total of 109 bryophyte species were recorded from 14 0.2 ha plots. Bryophyte life forms and habitats were analyzed, including the canopy and epiphylls. Bryophyte species did not show significant difference...

Importancia del lenguaje coloquial y de los símbolos de puntuación en el perfilado de autores

In recent years, author profiling (AP) has become a very relevant task for natural language processing (NLP). The main goal of 43 Research in Computing Science 115 (2016) pp. 43–56; rec. 2016-04-22; acc. 2016-05-15 AP is automatically determine demographic aspects from an author, for example, genre and age. In this paper we present a method for author profiling; particularly, we are interested ...

Especies en Peligro y Patrones de Desarrollo en los Estados Unidos

Conservation biologists and others hypothesize that humankind’s “ecological footprint” is affected not only by the sheer intensity of human activity but also by its spatial arrangement. We used a multivariate statistical model and state-level data to evaluate correlations between species imperilment and the level and spatial distribution of human settlement and infrastructure development in the...

El infarto del miocardio y los trastornos de conducción intraventricular

Molecular Phylogenetics of a clade of lowland tanagers: iMPlications for avian ParticiPation in the great aMerican interchange

Resumen.—La importancia de la formación del puente terrestre de Panamá para la diversificación de los mamíferos en el Nuevo Mundo ha sido bien documentada. Sin embargo, sólo recientemente se han presentado estudios que investigan el rol de este puente de tierra en la diversificación de las aves. Empleamos datos de ADN mitocondrial para reconstruir la filogenia del grupo de las tángaras (Thraupi...