Resumen

ESTRADA M, Catalina  y  FERNANDEZ C., Fernando. Diversidad de hormigas (Hymenoptera: Formicidae) en un gradiente sucesional del bosque nublado (Nariño, Colombia). Rev. biol. trop [online]. 1999, vol.47, n.1-2, pp.189-201. ISSN 0034-7744.

We evaluate the potential use of ants as indicator taxa of cloud forest recovery in La Planada Reserve, at southwestern Andine slope in Nariño, Colombia. The ants were sampled from February through August 1995, using pitfall traps, tuna baits and manual collection, in seven localities representing forest successional stages: cattle ground, grassland (three year old), two ten year old forests and 20 year old, exploit and primary forests. We found 63 species (29 genera) with a 20-26 species richness per locality, with the exception of the ten year old forest (12 species). There were no any statistical differences in species richness and diversity among samples and study sites. Nevertheless taxonomic composition was associated with the successional stage (Simple Matching Coefficient). Ants can be used as indicators of forest recovery at La Planada.

Palabras clave : Colombia; ants; indicator species; successional stages; disturbance; cloud forest.