Resumo

MEJIA ROSERO, HEIDY  e  PINO BENITEZ, NAYIVE. Diversity of Orchids Epiphytes in a Tropical Rain Forest (Bh-T)of Departament Chocó, Colombia. Acta biol.Colomb. [online]. 2010, vol.15, n.2, pp.37-46. ISSN 0120-548X.

The diversity of epiphytes orchids in a tropical humid forest of the municipality of Tutunendo (Quibdó) was evaluated. According to its level of intervention, it was established three zones in the forest: low (300 m²), medium (400 m²) and highly intervened (300 m²); 66 forófitos with a DAP ≥20 cm were recorded, in which orchids guests were sampled giving a total record of 1348 specimens, distributed in 49 species and 20 genera. In terms of number of species, the most representative genera were Maxillaria (11) and Dichaea (5). According to the Shannon-Weiner index a high diversity of epiphytes orchids can be observed in the area of study (H‘= 3.30). Regarding to areas according to the level of intervention, the low and medium intervened forest showed the highest diversity, however, the highly intervened, where tomb cultivation, sowing logging is constant, presented the lowest results. According to the Kruskal-Wallis test, these areas showed significant differences (P <0.05) in terms of richness and abundance of recorded species. Evidently, the high diversity of this group of plants may be due to certain climatic conditions (precipitation, humidity and light intensity), facilitating their establishment in the area.

Palavras-chave : Diversity; Epiphytes Orchids; Intervened forest; Tutunendo.

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