This research was done at the oil extraction field of Urucu River in Coari, Amazonas, during the months of April, June and October of 2007, in 16 areas, 12 of them forest clearings and four forests, arranged in four environments (C1,C2,C3 and MT) according to type of forest cover. The objective was to study the composition, abundance, wealth, and
diversity of Calliphoridae e Sarcophagidae (Insecta, Diptera) and also assess the possibility of these taxons to be used as parameters for evaluation of the
condition of vegetal recuperation in clearing areas. The number of calliphorid collected were 7.215 (three subfamilies, eight genera and 16 species), being
Chloroprocta idioidea (Robineau-Desvoidy,1830) (88,06%) and Paralucilia adespota Dear,1985 (4,35%) the most abundant species. The patterns of calliphorid abundance did not differ among the environments, however the e distinctive in relation to the estimated richness and diversity, forming two groups (C1-C2) and (C3-MT). The ordination analysis (non-metric multidimensional scaling) showed that the environment differed among themselves, as well as a greater similarity between C1-C2 and C3-MT, in relation to the structure of calliphorid communities. From the Sarcophagidae family 3.547 species were collected, distributed in 10 genera, six subgenera
and 23 species , being Sarcodexia lambens (Wiedemann,1830) (47,05%) and Peckia (Peckia) chrysostoma (Wiedemann,1830) (19,11%), the most abundant species. The patterns of abundance, estimated richness and diversity for this
family differed among environments and separated them into two groups, one from the clearings (C1,C2 and C3) and the other from the forest (MT). The
ordination analysis (non-metric multidimensional scaling) showed a separation
between sarcophagid fauna from clearings and those from the forests. The canopy cover influenced the pattern of abundance of Eumesembrinella randa
Sarcophagidae family, only the abundance of Peckia (Pattonella) intermutans
species (Walker,1861) was greater on environments with higher rates of forest
canopy. The abundance of Oxysarcodexia amorosa (Schiner,1868), O.
fringidea (Curran & Walley,1934), O. thornax (Walker,1849), P. (P.)
chrysostoma and S. lambens species presented a negative linear relation with
the forest canopy. These results indicate the possibility for use of these patterns
as parameters to assess change in the vegetation structure.
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