Resumo

DIAZ-PEREZ, CARLOS NELSON; PUERTO-HURTADO, MIGUEL ANTONIO  e  FERNANDEZ-ALONSO, JOSÉ LUIS. Habitat evaluation, population and conservation status of the "Barrigón" (Cavanillesia chicamochae, Malvaceae - Bombacoideae). Caldasia [online]. 2011, vol.33, n.1, pp.105-119. ISSN 0366-5232.

We estimated the degree of threat of the recently described Malvaceae-Bombacoideae Cavanillesia chicamochae Fern. Alonso, species considered endemic of the Chicamocha River Canyon and areas along the Sogamoso River Canyon (Santander-Colombia). We determined the geographical distribution and habitat of this species based on local historical information and the recognition of the area. The population's state, age structure, and phenology were diagnosed. Alongside, the vegetation was characterized by analyzing the disruption and / or threat factors that affect them. A total of 256 individuals were recorded at different altitudes (between 230 - 1100 m) and grouped into five age classes. The best represented were the seedlings with 118 individuals (46.1%), followed by adults 1 with 70 (27.34%). The reproductive period is annual, from late November to early March. The surrounding vegetation is represented by 100 species, 86 genera, and 40 families. The conservation status was determined according to the IUCN criteria (2001) as endangered (EN) because it has a potential range of 972 km2 and has an actual occupation area of 251 km2. The area has four main agents of disturbance: goat rearing, crop establishment, land instability, and an increasing removal of plants by collectors.

Palavras-chave : Bombacoideae; Categorization IUCN; Cavanillesia chicamochae; Colombia; Conservation; Malvaceae.

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