Autochthonous Communities
Mostrando 1-12 de 17 artigos, teses e dissertações.
-
1. POTENTIAL OF AUTOCHTHONOUS SULFATE-REDUCING MICROBIAL COMMUNITIES FOR TREATING ACID MINE DRAINAGE IN A BENCH-SCALE SULFIDOGENIC REACTOR
Abstract Biological acid mine drainage treatment depends significantly on inoculum origin, pH, COD/sulfate ratio, and carbon source. In this study, the performance and microbial diversity of anaerobic batch reactors used for sulfate reduction was evaluated. A medium COD/sulfate ratio of 1.14 ± 0.10 was used, and the evaluation was performed in two steps: Ph
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
-
2. Feeding ecology of stream-dwelling Characidae (Osteichthyes: Characiformes) from the upper Tocantins River, Brazil
In this contribution we studied the trophic ecology of four Characidae species from the Cavalo Stream, upper Tocantins River, considering diet overlap and trophic niche breadth. The diet of the four species was composed of adult and immature insects, both autochthonous and allochthonous in origin. Autochthonous items dominated the diet of Moenkhausia dichrou
Zoologia (Curitiba). Publicado em: 06/12/2013
-
3. Composition and trophic structure of fish communities in the Ribeirão Bananal sub-basin, Parque Nacional de Brasília, biome Cerrado, DF / Composição e estrutura trófica da comunidade de peixes de riachos da sub-bacia do Ribeirão Bananal, Parque Nacional de Brasília, bioma Cerrado, DF
The purpose of this study was determined the composition and the trophic structure of fish communities in the Ribeirão Bananal sub-basin, which belongs to a well preserved Cerrado area in the National Park of Brasília, Brazil. Furthermore, due to a marked sazonality in this biome, it was examined the influence of environmental variations on the fish specie
Publicado em: 2008
-
4. O turismo na periferia do capitalismo: a revelação de um cartão postal
Tourism has expanded considerably over the past few decades, with an annual movement of almost a million tourists, revenues of 4 trillion dollars per year and the provision of more than 280 million people with a job. The gigantic proportions of this activity arouse the interest of the government and businessmen. Furthermore, the combined actions to exploit t
Publicado em: 2008
-
5. Composição, abundância e dinâmica reprodutiva e alimentar de populações de peixes de um reservatório recém-formado (UHE - Capim Branco I / MG)
The loss of diversity is one of the main damage to the environment caused by the construction of reservoirs and it is related to the disappearance of terrestrial habitats by flooding, and the changes produced in the aquatic habitat. These changes reflect, above all, in the availability of food and in the reproduction of the fish species, leading to a remarka
Publicado em: 2008
-
6. ComposiÃÃo, abundÃncia e dinÃmica reprodutiva e alimentar de populaÃÃes de peixes de um reservatÃrio recÃm-formado (UHE - Capim Branco I / MG)
The loss of diversity is one of the main damage to the environment caused by the construction of reservoirs and it is related to the disappearance of terrestrial habitats by flooding, and the changes produced in the aquatic habitat. These changes reflect, above all, in the availability of food and in the reproduction of the fish species, leading to a remarka
Publicado em: 2008
-
7. Molecular Epidemiology of the virus of the imunodeficiência human being type 1 (HIV-1) in cities of the interior of the State of Rio de Janeiro, with emphasis in the cities of Miracema, Santo Antonio de Pádua and Saquarema, 2001 the 2006. / Epidemiologia Molecular do Vírus da Imunodeficiência Humana Tipo 1 (HIV-1) em Municípios do Interior do Estado do Rio de Janeiro, com Ênfase nas Cidades de Miracema, Santo Antonio de Pádua e Saquarema, 2001 a 2006.
The AIDS epidemic in Brazil is spreading from the large urban centers to small cities and the innermost parts of the country, yet data on the features of HIV-1 infection in these places are scarce. Such spread is expected to pose formidable medical, social and logistic challenges. By using mainly HIV-1 envelope and polymerase genomic regions, the studies tha
Publicado em: 2007
-
8. Dinamica da dispersão de sementes e regeneração de plantas da planicie litoranea da Ilha do Mel, PR
(Seed dispersal and plant regeneration dynamics in a Sandy Coastal Plain on Ilha do Mel, southern Brazil): The island Ilha do Mel is located in the municipality of Paranaguá (25°29 /25°34 32"S e 48°17 15"/48°23 16"W) in the central coastal region of Paraná State, Brazil and comprises 2760ha. The higher areas above the Sandy Coastal Plain contains very
Publicado em: 2002
-
9. Effects of Alkaline Phosphatase Activity on Nucleotide Measurements in Aquatic Microbial Communities †
Alkaline phosphatase (APase) activity was detected in aquatic microbial assemblages from the subtropics to Antarctica. The occurrence of APase in environmental nucleotide extracts was shown to significantly affect the measured concentrations of cellular nucleotides (adenosine triphosphate, adenosine diphosphate, adenosine monophosphate, guanosine triphosphat
-
10. Autochthonous eukaryotic diversity in hydrothermal sediment and experimental microcolonizers at the Mid-Atlantic Ridge
The diversity and mode of life of microbial eukaryotes in hydrothermal systems is very poorly known. We carried out a molecular survey based on 18S ribosomal RNA genes of eukaryotes present in different hydrothermal niches at the Mid-Atlantic Ridge. These included metal-rich and rare-earth-element-rich hydrothermal sediments of the Rainbow site, fluid–seaw
The National Academy of Sciences.
-
11. Colonization of the gut of the blue crab (Callinectes sapidus) by Vibrio cholerae.
Attachment of Vibrio cholerae to the mucosal surface of the intestine is considered to be an important virulence characteristic. Vibrio cholerae, an autochthonous member of brackish water and estuarine bacterial communities, also attaches to crustacea, a significant factor in multiplication and survival of V. cholerae in nature. The ability of V. cholerae to
-
12. Isolation of Non-O1 Vibrio cholerae Serovars from Oregon Coastal Environments †
Water, sediment, and shellfish from three Oregon estuaries were cultured for pathogenic Vibrio species. Non-O1 serovars of V. cholerae were the most common pathogenic Vibrio species recovered. Non-O1 V. cholerae were isolated from all three estuaries sampled, covering an area of about 170 miles along the Oregon coast. Non-O1 V. cholerae were isolated from wa