Navegando por Autor "Ferreira, Ríudo de Paiva"

Agora exibindo 1 - 2 de 2

A apifauna do Parque Estadual do Itacolomi, MG.
(2011) Sabino, William de Oliveira; Ferreira, Ríudo de Paiva; Itabaiana, Yasmine Antonini
O presente trabalho objetivou inventariar a apifauna do Parque Estadual do Itacolomi (PEIT) em três diferentes fitofisionomias (área de mata fechada, área aberta e uma área de mata de altitude). Foram realizadas coletas quinzenais, sendo que em cada local foi traçado um quadrante de 50x10m. Foram coletados 380 indivíduos na área aberta, 5 indivíduos na área de mata fechada e 22 indivíduos na mata de altitude, uma diferença estatisticamente significativa (F=30,113; p<0,001). As abelhas apresentaram sazonalidade ao longo do ano (Q=132,099; p<0,05), e uma correlação positiva com a riqueza de plantas (r=0,692; p=0,008). O PEIT apresenta um grande potencial em relação à comunidade de abelhas por apresentar uma grande heterogeneidade ambiental e recursos para as abelhas alimentarem a prole.
Old fragments of forest inside an urban area are able to keep orchid bee (Hymenoptera: Apidae: Euglossini) assemblages? The case of a brazilian historical city.
(2013) Ferreira, Ríudo de Paiva; Martins, Rafael; Dutra, Marina de Carvalho; Mentone, C. B.; Itabaiana, Yasmine Antonini
Retention of habitat fragments within the urban matrix can provide critical resources for the maintenance of regional biodiversity while still providing socio-economic value. Euglossini bees are important components in a community as they are important pollinators for economically valuable plants as well as hundreds of orchid species. However, some species are very sensitive to environmental impacts like urbanization. This study presents the role of antique urban fragments in a historical city in Brazil and compares it with a conservation area on the aspects of orchid bee assemblage, such as richness, composition, and abundance. Four fragments inside the city of Ouro Preto and three inside Parque Estadual do Itacolomi (PEIT) were sampled for Euglossini bees. Sorensen similarity index was used to compare community composition. The Mantel test was applied to verify the hypothesis that an urban center is a barrier for the mobility of the individuals. Fourteen Euglossini species from the region were registered. Close to 75% of the sampled bees were collected from the PEIT sampling areas. The fragments presented differences in Euglossini richness and abundance. A majority of the sampled fragments were dominated by the Eulaema cingulata Fabricius, Eulaema nigrita Lepeletier, and Euglossa securigera Dressler species. We found differences on community composition between the fragments localized in PEIT and those located in the urban center. The data suggest that there is a possible flux of individuals between the sampled fragments. The various small forest fragments in Ouro Preto, primarily in backyards, may also serve as stepping stones between sampled fragments.