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Descripción taxonómica y funcional de un ensamblaje de epífitas vasculares en la Cordillera Occidental Colombiana
Taxonomic and functional description of an assemblage of vascular epiphytes in the Western Colombian Andes
DOI:
https://doi.org/10.15446/caldasia.v46n2.106005Keywords:
Bosques húmedos, composición funcional, composición taxonómica, diversidad taxonómica, diversidad funcional (es)Wet forest, functional composition, taxonomic composition, taxonomic diversity, functional diversity (en)
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Las epífitas vasculares son componentes taxonómicos y funcionales relevantes en los ecosistemas húmedos, por lo que explorar su diversidad cobra relevancia en los bosques montanos del Valle del Cauca, donde se considera que existe submuestreo de estas plantas. Con el objetivo de caracterizar la diversidad taxonómica y funcional del ensamblaje de epífitas vasculares de un bosque muy húmedo montano bajo, se colectaron y censaron las especies de epífitas vasculares. Se estimó la composición, riqueza y diversidad taxonómica; y se caracterizó funcionalmente el ensamblaje empleando como rasgos funcionales el tipo de hábito, clonalidad, tipo de metabolismo, toma de nutrientes, y síndrome de dispersión; y estimando la riqueza funcional (FRic), la uniformidad funcional (FEve) y la divergencia funcional (FDiv). Se registraron 210 especies, en 26 familias, siendo Orchidaceae la de mayor riqueza. El ensamblaje se caracterizó por la prevalencia de epífitas verdaderas, presencia de estructuras de clonación, presencia de rasgos que facilitan la toma de nutrientes, y por la dominancia del metabolismo C3. Se obtuvo un FRic de 0,52, un FEve de 0,57, y un FDiv de 0,74. Los resultados nutren el conocimiento de las especies de epífitas vasculares de los ecosistemas andinos y permitieron postular dinámicas de ocupación, que pueden contribuir en la comprensión integral de la ecología de estas plantas en los bosques húmedos montanos.
Vascular epiphytes are a relevant taxonomic and functional component in wet ecosystems, which is why the epiphyte diversity is important in Valle del Cauca montane forests, where it is considered that there is subsampling of these plants. To characterize the taxonomic and functional diversity of a vascular epiphytes assemblage in a lower montane wet forest; the species of vascular epiphytes were collected and counted. We estimated the composition, richness, and taxonomic diversity; and the assembly was characterized functionally by using as functional traits the habit of life, clonality, metabolic type, spinescence, nutrient taking, dispersal syndrome; and we estimated functional richness (FRic), functional evenness (FEve), and functional divergence (Fdiv). We recorded 210 species, in 26 families: with Orchidaceae as the richest family. The assembly was characterized by the prevalence of true epiphyte, presence of structure of clonality, presence of traits for nutrient taking, and dominance of C3 metabolism. We recorded an FRic of 0.52, an FEve of 0.57, and a FDiv of 0.74. The results complement the knowledge of the vascular epiphyte species of the Andean ecosystems and allow us to postulate occupation dynamics, which can contribute to the comprehensive understanding of the ecology of these plants in montane humid forests.
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