Responses of Euglossine Bees (Hymenoptera, Apidae, Euglossina) to an Edge-Forest Gradient in a Large Tabuleiro Forest Remnant in Eastern Brazil

Dinoponera lucida is a poneromorph ant endemic to the Atlantic Forest of Brazil. The species is classified as endangered in Brazil’s Red List due to its peculiar reproductive biology and high habitat fragmentation. Herein, we characterize D. lucida foraging activity and response to litter surface temperature in a lowland forest remnant in south-eastern Brazil. The mean flow of workers at nest openings was 3.8 ± 0.6 per hour, mean foraging trip was 14.2 ± 2.2 min, and mean foraging distance was 3.8 ± 0.4 m. The time spent per foraging trip and litter surface temperature were positively correlated. Flow of workers at nest openings was higher with mean temperature of litter surface between 21.0 and 27.0 °C. Our results show that D. lucida has a diurnal foraging activity related to habitat temperature. Our data contribute to the knowledge about the ecology of D. lucida and support the hypothesis of optimal food foraging regulated by habitat temperature. In addition, the better understanding of D. lucida activity patterns can assist on conservation planning of this endangered and endemic ant.

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Spatial distribution of functional traits of bryophytes along environmental gradients in an Atlantic Forest remnant in north-eastern Brazil

Plant Ecology & Diversity ◽

10.1080/17550874.2019.1709227 ◽

2020 ◽

Vol 13 (1) ◽

pp. 93-104

Author(s):

João P. S. Souza ◽

Mércia P. P. Silva ◽

Kátia C. Pôrto

Keyword(s):

Spatial Distribution ◽

Atlantic Forest ◽

Functional Traits ◽

Environmental Gradients ◽

Eastern Brazil ◽

Forest Remnant ◽

North Eastern

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Chemical Composition and Antibacterial Activity of Essential Oils from Myrcia alagoensis (Myrtaceae)

Natural Product Communications ◽

10.1177/1934578x1300800235 ◽

2013 ◽

Vol 8 (2) ◽

pp. 1934578X1300800 ◽

Cited By ~ 1

Author(s):

Aline do N. Silva ◽

Ana Paula T. Uetanabaro ◽

Angélica M. Lucchese

Keyword(s):

Antibacterial Activity ◽

Chemical Composition ◽

Essential Oils ◽

Secondary Forest ◽

Antimicrobial Properties ◽

Drying Process ◽

Eastern Brazil ◽

Forest Remnant ◽

North Eastern

The chemical composition and antibacterial activity of essential oils obtained from fresh and dried leaves of Myrcia alagoensis O. Berg, collected in a secondary forest remnant in north-eastern Brazil, was compared. The essential oils were obtained by hydrodistillation from fresh and dried leaves, and analysed by GC/FID and GC/MS. The antimicrobial properties of the oils were investigated against five bacteria by determination of the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC). The essential oils were rich in cyclic sesquiterpenes, such as germacrene B, with antibiotic action against Gram-positive and Gram-negative bacteria. The drying process after collection interfered with the chemical composition and antibacterial activity of the assessed samples.

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