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Registros recuperados: 414 | |
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Biagi,Renata; Melo,Gustavo A. S.. |
The aim of the present study was to characterize the composition of Majoidea crabs inhabiting the infralittoral rocky/sandy bottom of Anchieta Island (Ubatuba), from north coast of São Paulo State. Crabs were collected monthly during 1999 and 2000 by using SCUBA and cages. The occurrence of eight species of majoids (Epialtus brasiliensis, Mithraculus forceps, Mithrax braziliensis, Mithrax hispidus, Mithrax tortugae, Pelia rotunda, Pitho lherminieri and Stenorhynchus seticornis) was registered and corresponded to 24.2% of total of majid crabs recorded in the coast of São Paulo State. Mithraculus forceps, Mithrax tortugae and Stenorhynchus seticornis were most abundant in samples and constituted populations that belonged to the brachyuran community of the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Majoidea; Diversity. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200015 |
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Mratinić,Evica; Akšić,Milica Fotirić. |
To determine the overall degree of polymorphism, detect similarities among the accessions and collect highly valued genotypes of native apples, 21 characters of 18 autochthonous apple cultivars were studied for three years. Particular individual accessions were selected from the south region of Serbia according to economically valuable characters and tested in situ. Agronomic evaluation of germplasm accessions revealed considerable diversity among different accessions for all the characters studied. The analysis of variance revealed significant differences among the accessions and among years for some characters as well. Cluster analysis distinguished Malus sp. accessions into three distinct groups. Despite of the significant differences among the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apple; Cluster analysis; Diversity; Genetic resources. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300004 |
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Dantas,Natália Carla Fernandes Medeiros; Silva Júnior,Carlos Antônio Beserra; Lippi,Daniel Lino; Feitosa,Caroline Vieira. |
ABSTRACT For the demersal fish that inhabit sandy beaches, the variation between day and night periods represents a determinant factor in their behavior, especially for species that live in shallow waters. This research aims at determining whether there are differences in the fish assemblage structure of the sandy beach of São Cristóvão, RN, Brazil, between diurnal and nocturnal periods. Samplings were carried out in 2011, during spring high tide period, with an otter trawl net. Dissimilarity between diurnal and nocturnal fish assemblages was confirmed by PERMANOVA results. No statistical differences were observed for richness and diversity of fish assemblage between day and night periods. The first and third order carnivores were the significantly more... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Demersal ichthyofauna; Density; Diversity; Total length; Day; Night. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100347 |
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FLOETER,S. R.; SOARES-GOMES,A.. |
Patterns of richness and biogeography of Gastropoda molluscs were determined based on lists of species from five sites along the southwestern Atlantic. The analysis of the distribution patterns of these sites confirmed the existence of a broader transition zone between southern Espírito Santo State (21°S) and Rio Grande do Sul State (32°S). This zone is very heterogeneous, presenting a low endemism rate and a significant number of species common to the near provinces, and does not show enough consistency to be considered as an independent biogeographic province as proposed by Palacio (1980). Observing the distribution of species along the southwestern Atlantic we find an increase in the proportion of species with greatest latitudinal ranges (occurring from... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogeography; Gastropoda; Southwestern Atlantic; Diversity. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400006 |
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BAPTISTA,D. F.; BUSS,D. F.; DORVILLÉ,L. F. M.; NESSIMIAN,J. L.. |
Diversity and habitat preference of macroinvertebrates were studied in Macaé River basin, Rio de Janeiro State, Brazil, along its longitudinal gradient. We selected stream reaches corresponding to 1st, 2nd, 4th, 5th and 6th orders. A Surber sampler was used to collect four macroinvertebrates samples of each substrate (sand, litter in pool areas, stones, and litter in riffle areas) during the three sampling periods, defined based on the rain regime: April (end of the rainy season), July (dry season), and October (beginning of the rainy season). We identified 46,431 specimens corresponding to 117 taxa. Analysis of diversity numbers (both for family or genus level) indicated that all insect taxonomic orders had higher numbers on 2nd order stream reach, except... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Aquatic insects; Longitudinal gradient; Tropical river; Brazil. |
Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200007 |
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Lyra,Andre C.; Fan,Xiaofeng; Di Bisceglie,Adrian M.. |
CD81 is a surface-associated protein expressed in the membranes of mammalian cells. It has been suggested that CD81 interacts with hepatitis C virus E2 protein, and thus might facilitate the entry of HCV into hepatocytes. The envelope-binding site appears to involve amino acids (aa) 480-493 and 544-551 within the E2 glycoprotein. Little is known about the quasispecies genetic diversity of these two regions. We studied four patients who underwent transplantation for HCV-related cirrhosis and who developed recurrent hepatitis C. We evaluated HCV quasispecies diversity in serum samples obtained at the time of transplantation and at several time points thereafter. Quasispecies diversity was assessed by cloning and sequencing of viral isolates, with computer... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hepatitis C virus; CD81; Diversity. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702004000200002 |
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Aanniz,Tarik; Ouadghiri,Mouna; Melloul,Marouane; Swings,Jean; Elfahime,Elmostafa; Ibijbijen,Jamal; Ismaili,Mohamed; Amar,Mohamed. |
The diversity of thermophilic bacteria was investigated in four hot springs, three salt marshes and 12 desert sites in Morocco. Two hundred and forty (240) thermophilic bacteria were recovered, identified and characterized. All isolates were Gram positive, rod-shaped, spore forming and halotolerant. Based on BOXA1R-PCR and 16S rRNA gene sequencing, the recovered isolates were dominated by the genus Bacillus (97.5%) represented by B. licheniformis (119), B. aerius (44), B. sonorensis (33), B. subtilis (subsp. spizizenii (2) and subsp. inaquosurum (6)), B. amyloliquefaciens (subsp. amyloliquefaciens (4) and subsp. plantarum (4)), B. tequilensis (3), B. pumilus (3) and Bacillus sp. (19). Only six isolates (2.5%) belonged to the genus Aeribacillus represented... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermophilic bacteria; Hot springs; Diversity; 16S rRNA gene sequencing; Hydrolytic enzymes. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000200443 |
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Braga,Raíssa Mesquita; Dourado,Manuella Nóbrega; Araújo,Welington Luiz. |
ABSTRACT The microorganism-microorganism or microorganism-host interactions are the key strategy to colonize and establish in a variety of different environments. These interactions involve all ecological aspects, including physiochemical changes, metabolite exchange, metabolite conversion, signaling, chemotaxis and genetic exchange resulting in genotype selection. In addition, the establishment in the environment depends on the species diversity, since high functional redundancy in the microbial community increases the competitive ability of the community, decreasing the possibility of an invader to establish in this environment. Therefore, these associations are the result of a co-evolution process that leads to the adaptation and specialization,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial interaction; Diversity; Microbe-host interaction; Molecular interaction. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000500086 |
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Reche,Maria Helena Lima Ribeiro; Fiuza,Lídia Mariana. |
Bacteria are the most diverse living beings on earth and only a fraction of them have been identified. This paper aims at the analysis of the diversity of mesophilic and heterotrophic bacteria found in samples of irrigation water from rice-fields areas in Rio Grande do Sul State, Brazil. Sample collection was carried out in five rice crop regions areas and followed by isolation, multiplication and bacterial characterization. The species' identification was based on biochemical tests (API-System, bioMérieux). Bacterial diversity was determined by the Shannon & Weaner and Pielou index. The results regarding bacterial diversity revealed 26 species. The most abundant representatives belonged to the Bacillus, Corynebacterium, Staphylococcus and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Diversity; Water; Rice-field. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300009 |
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Zilli,Jerri Édson; Valisheski,Romano Roberto; Freire Filho,Francisco Rodrigues; Neves,Maria Cristina Prata; Rumjanek,Norma Gouvêa. |
In order to contribute for the optimization of biological nitrogen fixation (BNF) associated with cowpea in Cerrado areas in the Northeast region of Brazil, this work aimed to analyze the diversity of rhizobial populations in eight areas of Cerrado, during a soybean and rice-cowpea rotation. Morphological traits (mucous production and colony morphology), genotypic analyzes (ARDRA 16S) and intrinsic resistance to antibiotics were determined for a collection of isolates captured using cowpea as a host-plant. The morphological data showed a inverse correlation (p < 0.05) between the number of legume (soybean and cowpea) crops, according to the history of each area, and rhizobium diversity, estimated by the Shannon-Weaver index. ARDRA data showed that... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Bradyrhizobium; Cerrado; Cowpea; Antibiotic. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300002 |
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Su,Yuan-Ying; Sun,Xin; Guo,Liang-Dong. |
The seasonal change and host preference of arbuscular mycorrhizal (AM) colonization and community composition of five common plant species Agropyron cristatum, Anemarrhena asphodeloides, Cleistogenes squarrosa, Leymus chinensis, and Stipa grandis in the Inner Mongolia steppe were investigated. The AM root length colonization rates were different among the five plant species and were generally high in early (May and June) and late (September) growth seasons and low in August. A total of 18 AM fungal species representing five genera were isolated from rhizosphere soils of the five plant species, and most AM fungi had not host specificity, except that Acaulospora sp., Glomus constrictum, G. diaphanum and Glomus sp. showed a certain degree of host preference.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seasonal dynamics; Arbuscular mycorrhizal fungi; Diversity; Grassland. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100008 |
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Registros recuperados: 414 | |
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