Organic matter decay and bacterial community succession in mangroves under simulated climate change scenarios.

Mangroves are coastal environments that provide resources for adjacent ecosystems due to their high productivity, organic matter decomposition, and carbon cycling by microbial communities in sediments. Since the industrial revolution, the increase of Greenhouse Gases (GHG) released due to fossil fuel burning led to many environmental abnormalities such as an increase in average temperature and ocean acidification. Based on the hypothesis that climate change modifies the microbial diversity associated with decaying organic matter in mangrove sediments, this study aimed to evaluate the microbial diversity under simulated climate change conditions during the litter decomposition process and the emission of GHG.

Fungal succession on the decomposition of three plant species from a Brazilian mangrove.

Leaf decomposition is the primary process in release of nutrients in the dynamic mangrove habitat, supporting the ecosystem food webs. On most environments, fungi are an essential part of this process. However, due to the peculiarities of mangrove forests, this group is currently neglected.

Performance evaluation of hybrid crowdsensing systems with stateful CrowdSenSim 2.0 simulator.

Mobile crowdsensing (MCS) has become a popular paradigm for data collection in urban environments. In MCS systems, a crowd supplies sensing information for monitoring phenomena through mobile devices. Depending on the degree of involvement of users, MCS systems can be participatory, opportunistic or hybrid, which combines strengths of above approaches.

The unexplored bacterial lifestyle on leaf surface.

Social interactions impact microbial communities and these relationships are mediated by small molecules. The chemical ecology of bacteria on the phylloplane environment is still little explored. The harsh environmental conditions found on leaf surface require high metabolic performances of the bacteria in order to survive.

Phosphorus-solubilizing Trichoderma spp. from Amazon soils improve soybean plant growth.

Acidic soils rapidly retain applied phosphorus fertilizers and consequently present low availability of this nutrient to plants. The use of phosphate-solubilizing microorganisms to help plant phosphorus (P) absorption is a promising sustainable strategy for managing P deficiencies in agricultural soils. Trichoderma strains have been one of the most studied filamentous fungi for improving the production and development of several crop species mainly due to their capability for symbiotic associations and their ability to control soil-borne plant diseases.

Intraspecific variation on epiphytic bacterial community from Laguncularia racemosa phylloplane.

Mangroves are dynamic and unique ecosystems that provide important ecological services to coastal areas. The phylloplane is one of the greatest microbial habitats, and most of its microorganisms are uncultivated under common laboratory conditions. Bacterial community structure of Laguncularia racemosa phylloplane, a well-adapted mangrove species with salt exudation at foliar levels, was accessed through 16S rRNA amplicon sequencing.

Bacterial Succession Decreases Network Complexity During Plant Material Decomposition in Mangroves.

In this study, 16S rRNA gene amplicon sequencing was used to assess bacterial diversity and dynamics throughout different stages of leaves decomposition of three plant species (Rhizophora mangle, Laguncularia racemosa, and Avicennia schaueriana) in three distinct mangroves of São Paulo state, Brazil. The experiments were conducted in microcosms. Phylogenetic diversity (Faiths' PD) index showed differences between samples and suggested that some treatments like R.

Higher phylogenetic diversity prevents loss of functional diversity caused by successive drying and rewetting cycles.

Microbial communities regulate nutrient cycling in soil, thus the impact of climate change on the structure and function of these communities can cause an imbalance of nutrients in the environment. Structural and functional changes of soil bacterial communities in two contrasting biomes in Brazil, the Atlantic Forest and the Tropical Dry Forest (Caatinga), were studied by simulating, in microcosms, rainfall and drought events. Soil samples were collected in three Brazilian states: Bahia, Pernambuco and São Paulo, in a total of four sampling sites.

[The in-vitro action of amoxicillin on 87 strains of Staphylococcus aureus of 1st isolation].

In vitro activity of Amoxycillin towards 87 strains of Staphilococcus aureus clinically isolated was analyzed. The 70% of the strains were very sensitive to the antibiotic action. Moreover the growth of the 50% of the strains was inhibited by Amoxycillin concentrations less than 0.

[A new technic for determination of antibiotics in the renal parenchyma].

The determination of antibiotics in the renal tissue is of real value only if the blood and the residue urine are removed from the kidney. The Authors report a new technique dealing with the washing of the organ "in situ" by means of an artery-vein perfusion succeeded by the sucking of the residue urine from the ureter. The experiments were carried on male albino rats with the following antibiotics: indanylcarbenicillin, tobramycin, fosfomycin and cefazolin.