Navegando por Assunto "Drosophilidae"

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Acesso aberto (Open Access)
Efeito da fragmentação florestal sobre a estrutura da comunidade de drosofilídeos (Diptera) no extremo sul da Amazônia
(Universidade Federal do Pará, 2005-02-28) SANTOS, Ronildon Miranda dos; MARTINS, Marlúcia Bonifácio; http://lattes.cnpq.br/8882047165338427
Ambient disturbances frequently produce changes in the structure of landscape and fauna diversity. Data about degradation's history, ambient structure and species have been collected in 30 forest fragments of different sizes in Alta Floresta and Apiacás towns, south of the Amazonia, to verify how Drosophilidae community answers to forest fragmentation. The results showed great heterogeneity between forest fragments; however diversity was similar between larger and best conserved and small with high degree of degradation. A total of 10.692 individuals of Drosophilidae, divided in 62 taxons, were collected. Relation between forest fragments size and species diversity was not observed. However, e opening of sub-forest was one of ambient variables that contributed the more to reduction of species diversity. Estimate of species richness for the region was around 100. The structure of abundance of communities was more similar between the forest fragments than species composition. About 34% of total richness was restricted to de forest edge and 19% to the center of the remnants; 47% of the species was common to both habitats. Some species of drosophilids answered to a distance gradient forest matrix-center. D. malerkoffiana, S. latifasciaefonnis and Z. indianus decreased their frequencies with the proximity of the center. On the other hand, the group willistoni increased in abundance. The main effect of the forest spalling on the community of drosophílids is the drastic alteration in species composition, with the matrix of the habitat being determinative in species composition of forest fragments.
Acesso aberto (Open Access)
A new Amazonian species from the Drosophila annulimana species group (Diptera, Drosophilidae)
(Universidade Federal do Pará, 2012-12) GOTTSCHALK, Marco Silva; MARTINS, Marlucia Bonifacio; PRAXEDES, Catarina de Lurdes Bezerra; MEDEIROS, Hermes Fonseca de
Drosophila caxiuana sp. nov., Drosophila subgenus, is described and illustrated. This new species was collected in the Amazonian Biome (Caquajó river, Portel, Pará, Brazil) and is an atypical species to the group due the unusual morphology of the male terminalia.
Acesso aberto (Open Access)
Riqueza e distribuição das espécies da guilda de drosofilídeos frugívoros (Diptera), em resposta às variações ambientais pela estratificação da floresta e topografia
(Universidade Federal do Pará, 2018-06-07) SILVA, Sâmia Luzia Sena da; MARTINS, Marlúcia Bonifácio; http://lattes.cnpq.br/8882047165338427
Among the factors that may influence the distribution of the species are the climate, the topography and the strata of the vegetation. Diptera that make up the Drosophilidae family are insects closely adapted to the physical conditions of their environment, and responses to environmental conditions are reflected in community structure, population size and local species composition. The variation effect of the climatic elements and topography in microscale on the richness, composition and distribution of abundance of frugivorous Drosophilidae was tested, in an area of dense ombrophilous of “terra firme” forest. The collections were conducted in April / 2016, September / 2016 and September-October / 2017 in the Amazonian Biodiversity Research Program (PPBio) in the Amapá National Forest (0 ° 40 "N, 51 ° 10" W; 50 °, 52 ° 30 ° W). The insects were collected using traps with fermented banana bait in 100g portions. There were 2.028 insects belonging to the family Drosophilidae, with 674 males distributed in 19 species. The species were distributed selectively between the vertical strata of vegetation and topographic profiles, with greater richness found in the understorey and lower topographic levels of the forest. The environmental heterogeneity was demonstrated by the variations of canopy opening, temperature and relative humidity of the air. Independently of the expedition, the species, except D. sturtevanti, demonstrated constancy in the occupation of the strata. The different microclimatic conditions between the forest strata and topographic profiles were determinant for the community structure of drosophilids. However, observed differences between expeditions indicate that other factors may also interfere with the behavior of these organisms causing variations in community.