Comunidades de arañas (Arachnida: Araneae) en microhabitats de dosel en bosques inundables y no inundables de la Amazonía colombiana

With the aim of exploring aspects of abundance, diversity and composition of the spider community in different canopy microhabitats, collections of this group were made during four months in 20 trees of Igapó and upland forests of the Colombian Amazon. The simple rope technique was used to access the canopy, and the spiders were collected from foliage, using a sweeping net and from epiphytes and dead organic matter by manual extraction. Eight-hundred and fifty spiders were sorted into 182 morphospecies and 40 families. Although the abundance in both forests was similar, the composition at the family and species levels was different within forests, showing that each of them is con- tributing to the total diversity estimates. Branch sweeping was the most extrac- tive technique; nevertheless, in the epiphytes and dead organic matter, species and families were found that were absent in the foliage. The important role that this stratum plays in the Colombian tropical forests is evidenced by the fact that 83% of the total number of families registered to Colombia was found