Abstract

GIL-LEGUIZAMON, PABLO ANDRÉS; MORALES-PUENTES, MARÍA EUGENIA  and  DIAZ-PEREZ, CARLOS NELSON. Population Assessment and Degree of Threat of Chalybea macrocarpa(Melastomataceae) Endemic Species from Colombia. Acta biol.Colomb. [online]. 2014, vol.19, n.2, pp.261-270. ISSN 0120-548X.  https://doi.org/10.15446/abc.v19n2.40691.

Population assessment results from Chalybea macrocarpaare shown, the specie is considerate ENDANGERED (EN) by its restricted area, threatened is generated by crops and extensive cattle farming. The study was conducted in the Boyacá department (Colombia), municipality of Arcabuco, in three established localities using herbarium and literature information; field work made possible identified distribution, density and phenology like sub criteria, allowing identify the presence extension and occupancy area. We took structural data (height, coverage and DBH) to determinate the population age's classes. Whit the gathered information and the associated vegetation, the specie is re-categorized with the B IUCN criteria. It is distributed to the northwest and southern in Arcabuco, in an area of 59.9 km2, 4 km2 of occupancy and a population density of 50 individual/km2. Flowering and fruiting is continuous through the year, however, most of the flowering is from March to August and fruiting from September to February. Age structure allows identified ten species between seedlings, juveniles and adults. Population is represented by few seedling individuals (10.6 %) and juveniles (20.9 %) versus adults (68.5 %). Finally, C. macrocarpais upgraded to Critical Risk (CR B1ab (iii)).

Keywords : distribution; endangered species; phenology; population.

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