High Abundance of Neotropical Drosophilids (Diptera: Drosophilidae) in Four Cultivated Areas of Central Brazil

High Abundance of Neotropical Drosophilids (Diptera: Drosophilidae) in Four Cultivated Areas of Central Brazil

The drosophilid assemblages of four cultivated areas (soy, bean, corn, and orange plantations) grown in the core of the Neotropical region were analyzed by comparing their abundances and compositions. The collections, which were gathered using 38 banana traps, captured 12,560 drosophilids, including...

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Bibliographic Details
Published in:Neotropical entomology Vol. 41; no. 2; pp. 83 - 88
Main Authors: Emerich, PP, Valadão, H, Silva, JRVP, Tidon, R
Format: Journal Article
Language:English
Published: New York Springer-Verlag 01-04-2012
Subjects:
Agriculture
Animals
Behavior and Bionomics
Biomedical and Life Sciences
Brazil
Citrus sinensis
Drosophilidae
Ecology
Entomology
Fabaceae
Glycine max
Life Sciences
Population Density
Zea mays
Brazil
Brazilian savanna
orange orchard
crop field
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Summary:The drosophilid assemblages of four cultivated areas (soy, bean, corn, and orange plantations) grown in the core of the Neotropical region were analyzed by comparing their abundances and compositions. The collections, which were gathered using 38 banana traps, captured 12,560 drosophilids, including nine Neotropical and six exotic species. Most of the flies were collected in the bean (43%) and soy (42%) fields. The composition and relative abundance of species also varied among cultivated areas, with orange orchards presenting the highest relative abundance of exotics due to the dominance of the Afrotropical Zaprionus indianus (Gupta). Crop plantations were dominated by a Neotropical species, Drosophila cardini (Sturtevant), which has been shown to be well adapted to dry and disturbed environments. We discuss the drosophilid assemblages of the cultivated areas, comparing them with assemblages from neighbor urban and natural environments. The low drosophilid richness found in this study is similar to the richness found in urban environments and lower than the drosophilid richness of forests, supporting a pattern already known for other taxa. The high abundance of drosophilids in cultivated areas, as well as the dominance of a Neotropical species ( D. cardini ) in the crop assemblages, was a surprising result.
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ISSN:1519-566X
1678-8052
DOI:10.1007/s13744-011-0004-x