Abstract

GARCIA C, ROCÍO  and  CHACON DE ULLOA, PATRICIA. Rove beeties (Coleoptera Staphyiinidae) in dry forest fragments of the Cauca river valley. Rev. Colomb. Entomol. [online]. 2005, vol.31, n.1, pp.43-50. ISSN 0120-0488.

The composition of beeties frorn the family Staphylinidae was studied in ten dry forest fragmenta located in the departrnents of Valle del Cauca and Risaralda Sampling was carried out with a transect system wtth stations spaced every 20 m Three collection methods were used at each station (1) Leaf litter sifting and staphylinid extraction with Winkler sacs, (2) l’itfall traps and (3) Visual searching. A total of 1.463 individuals, grouped in eight subfamilies and 78 morphospecies, were collected in 694 sampling stations This number of morphospecies corresponds to 10 7% of the species reported in Colombia. Subfamilies Paederinae and Staphylininae are the most dominant in the studied forests. At the regional level, the estimators Chao2, Jacknife 2 and ICE indicated that 90,7, 83,0 and 87,7% respectively of the expected species richness was reported in this study The Alejandria forest fragment showed the highest diversity with 51 species, followed in descending order by El Medio and El [latico fragments with 36 staphylinid species each. Cornplementarity indices showed high and similar values, indicating that species composition among the diíferent fragrnents is relativel different.

Keywords : Richness; Fragmentation; lnsects; Beetles; Colombia.

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