Consulta: subjectFacets:"Similarity"
Registros recuperados: 34
Data/hora: 29/05/2024 06:14:20

Establecimiento de Arachis pintoi Krap. &amp; Greg. Como cobertura de suelo en plátano macho en Cárdenas, Tabasco
Provedor de dados: 32
Autores: Ramos Hernández, Eder.
El experimento se realizó en Cárdenas, Tabasco en una plantación de plátano macho, en un suelo con textura franca, pH moderadamente ácido, contenido de materia orgánica y nitrógeno total bajo; con la finalidad de evaluar la repuesta al establecimiento de Arachis pintoi Krap. y Greg. como una cobertura viva, el cual se plantó a una distancia de 30 cm entre plantas y líneas. Se evaluaron tres porcentajes de sombra producida por la plantación de plátano macho (21, 45 y 50 %). Estadísticamente el nivel con menor porcentaje de sombra presentó los valores más altos en el índice de sobrevivencia de estolones de Arachis pintoi (ISE) a los 60 días después de la siembra (dds) y registró cobertura del suelo de 94.2 % y crecimiento lateral de estolones de 112.5 cm con...
Tipo: Tesis
Palavras-chave: Sombra; Sobrevivencia; Crecimiento; Altura; Efectividad; Materia seca; Shannon-Weaver; Similtud; Shade; Survival; Growth; Effectivenness; Dry matter; Shannon-Weaver; Similarity.
Ano: 2009
URL: http://hdl.handle.net/10521/1603

Establecimiento de Arachis pintoi Krap. &amp; Greg. como cobertura de suelo en plátano macho en Cárdenas, Tabasco
Provedor de dados: 32
Autores: Ramos Hernández, Eder.
El experimento se realizó en Cárdenas, Tabasco en una plantación de plátano macho,  en un suelo con textura franca, pH moderadamente ácido, contenido de materia  orgánica y nitrógeno total bajo; con la finalidad de evaluar la repuesta al  establecimiento de Arachis pintoi Krap. y Greg. como una cobertura viva, el cual se  plantó a una distancia de 30 cm entre plantas y líneas. Se evaluaron tres porcentajes  de sombra producida por la plantación de plátano macho (21, 45 y 50 %).  Estadísticamente el nivel con menor porcentaje de sombra presentó los valores más  altos en el índice de sobrevivencia de estolones de Arachis pintoi (ISE) a los 60 días  después de la siembra (dds) y registró cobertura del suelo de 94.2 % y crecimiento  lateral de estolones de...
Tipo: Tesis
Palavras-chave: Sombra; Sobrevivencia; Crecimiento; Altura; Efectividad; Materia seca; Shannon-Weaver; Similtud; Maestría; Producción Agroalimentaria en el Trópico; Shade; Survival; Growth; Effectivenness; Dry matter; Similarity.
Ano: 2009
URL: http://hdl.handle.net/10521/1276

Dynamic Time Warping-based imputation for univariate time series data
Provedor de dados: 5
Autores: Phan, Thi-thu-hong; Poisson Caillault, Émilie Poisson; Lefebvre, Alain; Bigand, André.
Time series with missing values occur in almost any domain of applied sciences. Ignoring missing values can lead to a loss of efficiency and unreliable results, especially for large missing sub-sequence(s). This paper proposes an approach to fill in large gap(s) within time series data under the assumption of effective information. To obtain the imputation of missing values, we find the most similar sub-sequence to the sub-sequence before (resp. after) the missing values, then complete the gap by the next (resp. previous) sub-sequence of the most similar one. Dynamic Time Warping algorithm is applied to compare sub-sequences, and combined with the shape-feature extraction algorithm for reducing insignificant solutions. Eight well-known and real-world data...
Tipo: Text
Palavras-chave: Imputation; Missing data; Univariate time series; DTW; Similarity.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00396/50696/51387.pdf

Sponge beta diversity in the Spermonde Archipelago, SW Sulawesi, Indonesia
Provedor de dados: 16
Autores: Voogd, N.J. de; Cleary, D.F.R.; Hoeksema, B.W.; Noor, A.; Soest, R.W.M. van.
Sponge assemblages were investigated in the Spermonde Archipelago, southwestern Sulawesi, Indonesia. In this study spatial patterns of sponge similarity among sites were significantly related to remotely sensed environmental variables, the degree of human settlement and depth, but not to the distance between sites. Both oviparous and viviparous species groups responded to similar environmental constraints, and differences in similarity were unrelated to the distance between sites. The degree of human settlement, however, was significantly related to variation in the composition of viviparous, but not oviparous species. Our results demonstrate, most importantly, the utility of remotely sensed data in predicting the spatial turnover of diverse species...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Indonesia; Porifera; Similarity; Spatial; 42.72.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/227743

BATS IN SETTLEMENTS FROM AN ATLANTIC FOREST AREA IN NORTHEASTERN BRAZIL
Provedor de dados: 84
Autores: ZEPPELINI,CAIO GRACO; REGO,KARLLA MORGANNA COSTA; LOPEZ,LUIZ CARLOS SERRAMO.
ABSTRACT Bats are key components of ecological networks, and studies in degraded areas are especially important to understand the impact of the human settlements on bats communities. Here, we surveyed the bat fauna in Guaribas Biological Reserve, a protected area in the Atlantic Forest in Paraiba state, northeastern Brazil, and compared it with the bat fauna that occupies the nearby villages. In the villages, we recorded 650 individuals from 14 species, while 1,127 individuals from 20 species were recorded in the Reserve. Diversity estimation pointed out 19 species for the settlements, and 22 for the Reserve. A Bray-Curtis/Sorensen similarity cluster analysis informed that the Reserve areas and the villages form two distinct groups. Additionally, a Wilcox...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bats; Anthropic impact; Similarity; Human occupation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017003100405

Faunistic analysis of Carabidae and Staphylinidae (Coleoptera) in five agroecosystems in northeastern São Paulo state, Brazil
Provedor de dados: 86
Autores: Cividanes,Francisco Jorge; Barbosa,José Carlos; Ide,Sérgio; Perioto,Nelson Wanderlei; Lara,Rogéria Inês Rosa.
The objective of this study was to determined species composition and community structure of Carabidae and Staphylinidae in five areas of forest fragment and soybean/corn crops or orange orchard, from December 2004 to May 2007. Beetles were captured in pitfall traps distributed along two parallel transects of 200 m in length, placed across crop land/forest boundary fragment, with 100 m each. The Shannon-Wiener diversity and evenness indexes and Morisita similarity index were calculated. The carabids Abaris basistriatus Chaudoir, Calosoma granulatum Perty, Megacephala brasiliensis Kirby, Odontochila nodicornis (Dejean) and Selenophorus seriatoporus Putzeys. are dominant and are widely distributed in northeastern São Paulo state, Brazil. Point-scale species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sinensis; Glycine max; Zea mays; Diversity; No-tillage; Similarity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800023

Similarity networks for the classification of rice genotypes as to adaptability and stability
Provedor de dados: 86
Autores: Silva,Gabi Nunes; Silva Júnior,Antônio Carlos da; Sant’Anna,Isabela de Castro; Cruz,Cosme Damião; Nascimento,Moysés; Soares,Plínio César.
Abstract: The objective of this work was to evaluate the similarity network graphic methodology for the classification of flood-irrigated rice (Orzya sativa) genotypes regarding their adaptability and stability. Two statistical measures were used to represent the proximity of the behavior (based on Pearson’s correlation) or values (based on Gower’s distance) between pairs of genotypes or between genotype and environment. Productivity data of 18 genotypes were evaluated in three locations in the state of Minas Gerais, Brazil, in the harvests of 2012/2013, 2013/2014, 2014/2015, and 2015/2016, in a randomized complete block design. The genotypes were previously assessed for adaptability and stability by the Eberhart &amp; Russell and centroid methods. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Orzya sativa; Flood-irrigated rice; Genotype x environment interaction; Graphic analysis; Similarity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2020000102901

Phytosociological surveys: tools for weed science?
Provedor de dados: 87
Autores: Concenço,G.; Tomazi,M.; Correia,I.V.T.; Santos,S.A.; Galon,L.
In simple terms, a phytosociological survey is a group of ecological evaluation methods whose aim is to provide a comprehensive overview of both the composition and distribution of plant species in a given plant community. To understand the applicability of phytosociological surveys for weed science, as well as their validity, their ecological basis should be understood and the most suitable ones need to be chosen, because cultivated fields present a relatively distinct group of selecting factors when compared to natural plant communities. For weed science, the following sequence of steps is proposed as the most suitable: (1) overall infestation; (2) phytosociological tables/graphs; (3) intra-characterization by diversity; (4) inter-characterization and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed community; Density; Frequency; Dominance; Diversity; Similarity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200025

Phytosociological Survey of Sugarcane Crop Weeds in Different Agroecological Areas in Tucumán Province, Argentina
Provedor de dados: 87
Autores: CABRERA,D.C.; CHAILA,S.; SOBRERO,M.T.; VARELA,A.E.
ABSTRACT: Weeds constitute the main constraint on the productivity of sugarcane agroecosystems in Argentina. This work aimed to analyze the floristic and phytosociological composition of sugarcane weed communities in different agroecological areas in Tucumán. Fifteen plots from each area were sampled 60 to 90 days after crop shooting, by throwing a 0.5 m x 0.5 m quadrat metallic frame six times in random directions in each of the plots. Species found within the frame were identified. Later, fresh and dry biomass weight were calculated per quadrat sample and species. Frequency, density, dominance, importance value index, Shannon-Wiener and Simpson species diversity index and Jaccard similarity index were calculated. The unweighted pair group method with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sacharum officinarum L.; Importance value index; Diversity; Similarity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100226

Similarity and Income Content at the International Trade: The Case of BRICs during the Period 2000/09
Provedor de dados: 31
Autores: Silva,   Orlando Monteiro da; Drumond,   Rafael Rodrigues; Almeida,   Fernanda Maria de.
This study aimed to calculate the patterns of similarity and income content of Brazilian, Russian, Chinese and Indian exports by means of indexes, and compare those patterns with those of OECD countries, covering a period between 2000 and 2009. The results indicate that Brazilian, Russian, Chinese and Indian exports became more similar between 2000 and 2006, but that similarity has declined ever since. Exports from China and India, in turn, are increasingly similar to each other and less different from the exports of OECD countries. Export sophistication has increased over the years, with higher growth rates in China and India. India and Russia's sophistication indexes surpassed that of Brazil in 2007, which signal that those countries currently export...
Tipo: Conference Paper or Presentation
Palavras-chave: Exports; Brazil; Russia; China; India; Similarity; Income content; Agribusiness; F14.
Ano: 2011
URL: http://purl.umn.edu/115527

Similarity among periphyton algal communities in a lentic-lotic gradient of the upper Paraná river floodplain, Brazil
Provedor de dados: 88
Autores: RODRIGUES,LILIANA; BICUDO,DENISE DE C.
Floristic comparison of periphyton communities from three systems with different hydrodynamic regimes (lentic, semilotic, and lotic) was carried out during high and low water periods on the Upper Paraná River floodplain. For each period and system, glass slides were sampled every two days during 18-day periods, and Eichhornia azurea Kunth petioles were sampled three times. A total of 228 species was collected, representing 12 classes, mainly diatoms and desmids. The highest species-richness was found in communities from lentic system and during high water. Species richness in the lotic system was more stable over succession and hydrological periods. Algal taxonomic structure in river community was clearly separated from the other two systems, with 43% of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Periphyton; Benthic algae; Species composition; Similarity; Tropical floodplain.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000300001

Floristic and vegetation structure of a granitic grassland in Southern Brazil
Provedor de dados: 88
Autores: Ferreira,Pedro Maria de Abreu; Müller,Sandra Cristina; Boldrini,Ilsi Iob; Eggers,Lilian.
A floristic and structural survey of a natural grassland community was conducted on Morro do Osso, a granitic hill in Porto Alegre, RS, Brazil. Structural data were surveyed in 39 one square meter plots placed over two major grassland areas. An accidental fire has occurred in one of the areas approximately one year prior to our survey, leading to further analysis of parameters differences between sites. The floristic list contains 282 species, whereas the structural survey has found 161 species. Families with highest accumulated importance values were Poaceae, Asteraceae and Fabaceae. The diversity and evenness indexes were 4.51 nats ind-1 and 0.86, respectively. Cluster analysis denoted two groups coinciding with the areas distinguished by the fire...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Campos; Diversity; Fire; Relict vegetation; Similarity; Threatened species.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000100004

The snake assemblage (Squamata: Serpentes) of a Cerrado-Caatinga transition area in Castelo do Piauí, state of Piauí, Brazil
Provedor de dados: 103
Autores: Rodrigues,Francílio da Silva; Prudente,Ana Lúcia da Costa.
This study records and analyzes the diversity and structure of a snake assemblage in a transition area between Cerrado and Caatinga, in the municipality of Castelo do Piauí, state of Piauí, comparing the distribution and similarity of the species composition with other open localities already studied in Brazil. We used three complementary sampling methods: time constrained search (TCS), pitfall traps with drift fences (PFT), and incidental encounters (IE). During the TCS and PFT, 912 hours/observer and 6,468 days/trap were used, respectively. We estimated 23 species of snakes for the locality, although only 19 species were recorded. Philodryas nattereri Steindachner, 1870 (n = 10), Liophis poecilogyrus (Schlegel, 1837) (n = 9), Liophis viridis Günther,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Composition; Ecotones; Richness; Similarity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400005

Abiotic gradients drive floristic composition and structure of plant communities in the Monte Desert
Provedor de dados: 97
Autores: ACEBES,PABLO; TRABA,JUAN; PECO,BEGOÑA; REUS,MARÍA L; GIANNONI,STELLA M; MALO,JUAN E.
Defining plant communities in desert zones is difficult due to large scale homogeneity and small scale heterogeneity, thus making provision of systematic information for conservation decisions problematic. We analysed plant communities of the most arid sector of Monte Desert for structure, plant composition and environmental variables. Small-scale variables such as slope, rock cover, bare ground and litter, as well as large-scale ones such as species diversity, composition and similarity within and between sites were included. Analyses of floristic composition showed the difficulty of segregating distinct communities due to high internal heterogeneity and overlap between the different sites. Only mesquite woodlands, a community situated at the extreme of...
Tipo: Journal article
Palavras-chave: Arid environment; Heterogeneity; Shrubland; Similarity; Species richness.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000300007

Patterns of turnover and floristic similarity show a non-random distribution of naturalized flora in Chile, South America
Provedor de dados: 97
Autores: CASTRO,SERGIO A; JAKSIC,FABIÁN M.
The current geographical distribution of alien species could be informative of processes involved in the biological invasions facilitated by humans. Because environmental and anthropic factors affect the geographic distribution of alien plants, we hypothesize that naturalized plants have a non-random distribution along extensive geographical ranges. On the basis of a complete and updated database of naturalized plants in Chile, we analyzed their turnover and floristic similarities among regions that encompass a wide latitudinal gradient in South America. Using Moran's index and Mantel's test we characterized the spatial auto-correlation (regional aggregation) and the effect of geographical distance on the index values. Additionally, we used clustering...
Tipo: Journal article
Palavras-chave: Jaccard's index; Whittaker's index; Plant invasions; Naturalized plants; Similarity; Turnover.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000100009

Comments on plant-herbivore-parasitoid interactions in two cerrado areas of Southern Brazil
Provedor de dados: 104
Autores: Caldas,Astrid; Passos,Fernando de C.
This work describes some interactions between lepidopteran larvae and braconid parasitoids on a group of plants at two sites. There was no significant difference in parasitoid diversity between the sites (Shannon index, p&lt;0.05), and similarity was 62.5%, estimated through Sorensen's index. The diversity of hosts was also not different (p&lt;0.05), but the similarity of host diversity was only 28.5%. This suggests that the parasitoids have strategies for maintaining similar reproduction rates, population densities and communities in areas with different potential hosts.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Braconidae; Diversity; Community; Lepidoptera; Similarity.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200010

Colonização ictiofaunística do Reservatório de Itaipu e áreas adjacentes
Provedor de dados: 104
Autores: Benedito Cecilio,Evanilde; Agostinho,Angelo Antonio; Júlio Jr,Horácio Ferreira; Pavanelli,Carla Simone.
Samples were taken from November 1983 to October 1989 in sites along the main body of the Itaipu reservoir and its area of influence to evaluate the impacts of this reservoir on ichthyofauna and to provide information about the colonization process in the dammed area. The ichthyofaunistic similarity between the sites was analysed during the studied period. Spatial and temporal variations of the ichthyofaunistic diversity were also done, using Shannon-Winer Index of Diversity, eveness and species richness, comparing the results with those obtained before the damming. After Itaipu Reservoir formation, it was observed significative alteration in specific abundance and ichthyofauna structure of the Paraná River, with an increase in species number in ali...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyofauna; Paraná river; Itaipu reservoir; Diversity; Similarity.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100001

Estudo comparativo sobre a composição e a diversidade de lepidópteros noturnos em cinco áreas da Região dos Cerrados
Provedor de dados: 104
Autores: Camargo,Amabílio J. Aires de.
The understanding of the distribution and richness patterns of species is very important in ecology. Also, for the Cerrado region, this is very important and urgent, because of the strong pressure for new areas designated for agriculture. In five areas of the Cerrado, an exploratory study was carried out on the diversity, evenness and similarity of moth species. Moths were captured in a white sheet hung vertically and illuminated by a 250 Watt mercury vapor lamp. The alpha diversity was calculated using the Shannon-Wiener index (H') and the Simpson index (γ). The beta diversity was examined for all sampled localities and estimated by Wittaker's measure. The Sörensen and Jaccard indexes were used to calculate similarity. A total of 11130 individuals, 1064...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lepidoptera; Moths; Brazilian savannas; Biodiversity; Similarity.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200004

Conservation potential of shade-tolerant forest species in agricultural mosaics in the eastern Brazilian Amazon
Provedor de dados: 36
Autores: DO VALE,Igor; MIRANDA,Izildinha Souza; MITJA,Danielle; SANTOS,Alessio Moreira; SANTOS,Graciliano Galdino Alves dos; LEÃO,Fábio Miranda; OLIVEIRA,Mariana Gomes; COSTA,Luiz Gonzaga da Silva.
ABSTRACT Shade-tolerant forest species are among the most susceptible to habitat loss in agricultural mosaics, where a variety of croplands is connected to forests at different levels of anthropogenic disturbance. We aimed to evaluate the community similarity of shade-tolerant species among different land use types across agricultural mosaics with different levels of disturbance. The study was conducted in three municipalities in southern and southeastern Pará state, in eastern Amazonia. A multiple-community similarity measure based on the Horn similarity index was used to compare land use types and assess the resilience of shade-tolerant species towards forest loss and disturbance at the landscape level. High shade-tolerant species similarity was found...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floristics; Land use; Pasture; Resilience; Similarity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200124

Lycophytes and ferns composition of Atlantic Forest conservation units in western Paraná with comparisons to other areas in southern Brazil
Provedor de dados: 39
Autores: Lautert,Mayara; Temponi,Lívia Godinho; Viveros,Raquel S.; Salino,Alexandre.
This study surveyed lycophyte and fern species in four forest fragments in western Paraná, Brazil, and compared them to 15 other fragments with different plant formations from the Atlantic Forest biome in southern Brazil. In total, five lycophyte species (in two families and two genera) and 98 species and two varieties of ferns (in 16 families and 38 genera) were registered in the four fragments. The most represented families were Pteridaceae (23 spp.), Polypodiaceae (18 spp.), Aspleniaceae (13 spp.), and Thelypteridaceae (11 spp.). Asplenium (12 spp.), Thelypteris (10 spp.), and Blechnum (seven spp.) were among the most represented genera. The occurrence of Dicksonia sellowiana was noteworthy because it was associated with seasonal semideciduous forest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria forest; Pteridophytes; Semideciduous forest; Similarity; Species richness.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400499

Vascular epiphytic flora of a high montane environment of Brazilian Atlantic Forest: composition and floristic relationships with other ombrophilous forests
Provedor de dados: 39
Autores: Furtado,Samyra Gomes; Menini Neto,Luiz.
ABSTRACT Only a few studies regarding vascular epiphytes have been conducted in mixed ombrophilous forests (MOF) in Serra da Mantiqueira, a mountainous environment in the Brazilian Atlantic Forest, where the relationships of epiphytic flora with other physiognomies are unknown. This study aimed to survey the epiphytes of a MOF remnant located in Serra da Mantiqueira, and to analyze the floristic relationships with ombrophilous forests of the Southern and Southeastern regions of Brazil. The checklist was compared with 51 other areas composed of ombrophilous forests and/or ecotones with other physiognomies using UPGMA (with Sørensen index), and canonical correspondence analysis (CCA). We recorded 138 species, and Orchidaceae and Polypodiaceae were the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Conservation; Endangered species; Environmental variables; Epiphytism; Mixed ombrophilous forest; Serra da Mantiqueira; Similarity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300422

Genetic diversity and population structure of sugarcane (Saccharum spp.) accessions by means of microsatellites markers
Provedor de dados: 1
Autores: Zeni Neto, Hugo; Borsuk, Luiz Gustavo da Mata; Santos, Luiz Renato Frederico  dos; Angeli, Henrique Sanches; Berton, Guilherme Souza; Sousa, Lorena Lopes de.
The success of sugarcane (Saccharum spp.) breeding programs depends on the choice of productive parent lines that have a high industrial yield and are genetically divergent. This study assessed the genetic divergence and population structure of sugarcane accessions that are the parents of the RB05 Series of the Sugarcane Breeding Program of Brazil. The DNA of 82 accessions was evaluated using 36 simple sequence repeat markers. The Jaccard similarity coefficient and Unweighted Pair Group Method with Arithmetic Mean clustering method were used to generate a cluster that was divided into 17 distinct groups derived from probabilistic models. The similarity coefficient used in both cases showed that the degree of similarity varied from 0.4716 (RB971551 x...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymorphism content; UPGMA; Similarity; RB Series. polymorphism content UPGMA similarity RB Series Divergência Genética.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45088

Structural and compositional shifts in Cerrado fragments in up to 11 years monitoring
Provedor de dados: 3
Autores: Cordeiro, Natielle Gomes; Pereira, Kelly Marianne Guimarães; Terra, Marcela de Castro Nunes Santos; Mello, José Márcio de.
The Cerrado has a wide diversity of fauna and flora, and the knowledge of its horizontal structure, in different time intervals allows the prediction of its structural and floristic characteristics. The aim of this study was to evaluate the changes in structure and composition of tree community in three fragments of Cerrado with low anthropization, in an interval of 11 years at Minas Gerais state. Rectangular plots of fixed size were sampled, measuring stem diameter and height of all living arboreal individuals with diameter at 1.30 meters above ground (DBH) ≥ 5 cm. The tree vegetation dynamics study of the areas was performed, as well as the floristic analysis and the diametric structure. Considering all fragments and years of measurement, the recruitment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tree community dynamics; Diversity; Ingrowth; Recruitment; Similarity; Vegetation. tree community dynamics; Diversity; Ingrowth; Recruitment; Similarity; Vegetation.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/48357

Estrutura da comunidade das larvas de Chironomidae (Insecta: Diptera), em diferentes substratos artificiais e fases hídricas, no trecho superior do rio Paraná, Estado do Paraná, Brasil - doi: 10.4025/actascibiolsci.v32i2.5387
Provedor de dados: 3
Autores: Anjos, Adriana Felix dos; UEM; Takeda, Alice Michiyo; UEM.
Este estudo teve como objetivo verificar a influência das fases hídricas sobre a composição, a densidade e a dominância das larvas de Chironomidae em diferentes tipos de substratos artificiais. As coletas foram realizadas quinzenalmente, entre os meses de agosto de 2004 e dezembro de 2005. A análise de agrupamento revelou diferenças na composição e densidade das morfoespécies entre as fases hídricas e, de acordo com o índice de dominância de Kownacki, Cricotopus sp. foi dominante ou subdominante em todos os substratos e fases hídricas. Na fase de águas baixas, a maior similaridade foi observada entre os substratos de mesma forma. Nesse período, os maiores valores de riqueza e densidade das larvas foram registrados nos substratos em forma de X. Na fase de...
Palavras-chave: Rio Paraná; Similaridade; Dominância; Colonização; Fases hídricas 2.05.00.00-9 Paraná river; Similarity; Dominance; Colonization; Hydrological phases.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5387

Periphytic algal community in artificial and natural substratum in a tributary of the Rosana reservoir (Corvo Stream, Paraná State, Brazil) - doi: 10.4025/actascibiolsci.v32i4.4627
Provedor de dados: 3
Autores: Felisberto, Sirlene Aparecida; Universidade Federal de Goiás; Rodrigues, Liliana; Universidade Estadual de Maringá.
Periphytic algal community in artificial and natural substratum in a tributary of the Rosana reservoir (Corvo Stream, Paraná State, Brazil). This study evaluated the heterogeneity in periphytic algal community, under the influence of time colonization on artificial substratum. We also examined which abiotic variables most influenced the community in natural and artificial substratum. Egeria najas Planchon was used as natural substratum, and a plastic plant, as artificial. This experiment was carried out in a lateral arm from Rosana Reservoir, formed by Corvo Stream (Paranapanema river basin), in the period from November 21st to December 12nd, 2003, characterized as a warm and rainy period. Changes in species composition were assessed using the similarity...
Palavras-chave: 2.00.00.00-6; 2.05.02.00-1 Ecology; Colonization; Phycoperiphyton; Zygnemaphyceae; Similarity Ecologia Ecology; Colonization; Phycoperiphyton; Zygnemaphyceae; Similarity.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4627

Parasite infracommunities of  Leporinus friderici: A comparison of three tributaries of the Jurumirim Reservoir in southeastern Brazil
Provedor de dados: 42
Autores: YAMADA,FÁBIO H.; BONGIOVANI,MARCELA F.; YAMADA,PRISCILLA O.F.; SILVA,REINALDO J. DA.
ABSTRACT The degradation and homogenization of natural habitats is considered a major cause of biotic homogenization. Many studies have been undertaken on the effects of dams on aquatic wildlife, in particular fish assemblages. But how do dams affect the parasitic fauna of such fish? The aim of the present study was to examine parasitic similarity, comparing the diversity and structure of parasite communities of Leporinus friderici (Characiformes, Anostomidae) in three upstream tributaries under the influence of the Jurumirim Dam on the Upper Paranapanema River in southeastern Brazil. The present study did not find any significant differences in parasite communities among populations of L. friderici in the three upstream tributaries. This result highlights...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical region; Leporinus friderici; Metazoan parasites; Similarity; Watershed conservation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300953

Floristic-functional variation of tree component along an altitudinal gradient in araucaria forest areas, in Southern Brazil
Provedor de dados: 42
Autores: SOBOLESKI,VANESSA F.; HIGUCHI,PEDRO; SILVA,ANA CAROLINA DA; SILVA,MARIELE A.F. DA; NUNES,AMANDA S.; LOEBENS,RODINELI; SOUZA,KARINE DE; FERRARI,JHENIFFER; LIMA,CARLA L.; KILCA,RICARDO V.
ABSTRACT We aimed to investigate the taxonomic and functional variations of tree component of Araucaria Forest (AF) areas located along an altitudinal gradient (700, 900 and 1,600 m asl), in the southern region of Brazil. The functional traits determined were leaf area, specific leaf area, wood density, maximum potential height and dispersal syndromes and deciduousness. The data were analyzed through a functional and taxonomic dissimilarity dendrograms, community-weighted mean trait values, parametric and nonparametric tests, and Principal Component Analysis. The largest floristic-structural similarity was observed between the lower altitude areas (700 and 900 m asl), whose Bray-Curtis distance was 0.63. The area at 700 m asl was characterized by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional traits; Altitude; Similarity; Subtropical forest.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502219

Mixed thermal convection: fundamental issues and analysis of the planar case
Provedor de dados: 42
Autores: PADET,JACQUES; COTTA,RENATO M.; MLADIN,EMILIA C.; PADET,COLETTE.
This paper aims to renew interest on mixed thermal convection research and to emphasize three issues that arise from the present analysis: (i) a clear definition of the reference temperature in the Boussinesq approximation; (ii) a practical delimitation of the three convective modes, which are the forced convection (FC), mixed convection (MC) and natural (or free) convection (NC); (iii) and, finally, a uniform description of the set FC/MC/NC in the similarity framework. The planar case, for which analytical solutions are available, allows a detailed illustration of the answers here advanced to the above issues.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mixed convection; Boussinesq approximation; Similarity; Buoyancy forces; Entropy production; Reverse flow.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401865

Tree and shrub species of the Atlantic Forest on the slopes of Marambaia Island, Rio de Janeiro, Brazil
Provedor de dados: 49
Autores: Nettesheim,Felipe Cito; Menezes,Luis Fernando Tavares de; Carvalho,Daniel Costa de; Conde,Marilena Menezes Silva; Somner,Genise Vieira; Rodrigues,Guilherme de Assis; Araujo,Dorothy Sue Dunn de.
This study describes the tree and shrub component of the Atlantic Forest on the slopes of Marambaia Island, RJ. It further evaluates which species are found at threatened species lists and the similarity that the studied forest component has with other nearby locations with similar vegetation. Data gathering relied on the joint effort of arbitrary walks and sampling units known as Transect. The same sampling criterion was applied at both approaches (DBH greater than or equal to 5 cm). A similarity analysis, followed by a Cluster analysis, was used to compare the studied vegetation component. Similarity calculations were based in the Bray-Curtis coefficient. We detected a total of 235 species. These are divided in 134 genera and 52 families. The richest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dense ombrophilous forest; Floristic; Species richness; Similarity; Phytogeography.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300021

Composition and diversity of anurans in the largest conservation unit in Pampa biome, Brazil
Provedor de dados: 49
Autores: Bolzan,Ana Maria Rigon; Saccol,Suélen Alves; Santos,Tiago Gomes dos.
Grassy biomes occupy about 20% of the earth's surface, and are characteristic of northern Australia, Africa and South America, being biodiversity in these environments poorly understood. The Área de Proteção Ambiental (APA) do Ibirapuitã includes areas with the best-preserved grassland areas in the Pampa biome in Rio Grande do Sul state, Brazil. This study aimed to determine anuran species richness, abundance, constancy of occurrence, and reproductive modes, and to compare the taxonomic composition in the APA with other localities within the grassland areas of the southernmost of South America. We collected frogs from September to November 2012 and in November 2013 by sampling of reproductive sites. We also examined specimens deposited in herpetological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anuran communities; Native grasslands; Tadpoles; Reproductive modes; Similarity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200302

Species composition of climbers in seasonal semideciduous forest fragments of Southeastern Brazil
Provedor de dados: 49
Autores: Santos,Karin dos; Kinoshita,Luiza Sumiko; Rezende,Andréia Alves.
In this study we evaluated floristic composition patterns of communities of climbers within ten inventories carried out in semideciduous forest fragments of southeastern Brazil. One of the inventories is original, being carried out for the present study in Ribeirão Cachoeira forest, Campinas, São Paulo State, Southeastern Brazil. This inventory was then pooled together to other nine climbers' inventories made in other forests of Southeastern Brazil to form a data base, which was examined regarding species richness, similarity, species distribution and climbing methods. The total number of species obtained was 355, belonging to 145 genera and 43 families. The ten most diverse families Bignoniaceae (45 species), Fabaceae (42), Malpighiaceae (36), Asteraceae...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lianas; Climbing mechanism; Floristic; Similarity; NMS.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400018

Pollination and dispersal systems in a Cerrado remnant (Brazilian Savanna) in Southeastern Brazil
Provedor de dados: 52
Autores: Ishara,Katia Losano; Maimoni-Rodella,Rita de Cassia Sindrônia.
The aim of this work was to identify the pollination and dispersal systems among the species in a disjunct marginal cerrado area and to compare the frequency of these systems to those found in other Neotropical vegetation. The floral and diaspore traits and the pollination and dispersal systems of 176 species were analysed in a cerrado remnant in Southeastern Brazil. The most frequent pollination system was melittophily (63% of the studied species) with the remaining 37% distributed among diverse pollination systems. Zoochory was the predominant system of dispersal (44.9%). The frequencies of melittophily and zoochory observed in diverse tropical areas were the main feature that allowed the formation of distinct groups in the dendrograms generated by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dispersal syndrome; Melittophily; Pollination syndrome; Similarity; Zoochory.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300025

Genetic similarity between staphylococcus sp isolated from human and hospital settings, and susceptibility to different antimicrobials
Provedor de dados: 58
Autores: Fabiano,Telma Luciana Trovó; Ávila,Bruna Helena Pinheiro de; Dias,Cleusa Cascaes; Maluta,Renato Pariz; Ávila,Fernando Antonio de.
One hundred and forty-three samples from human hands and hospital beds were collected at a teaching hospital in the city of Ribeirão Preto/SP by swabs, and placed in BHI broth. Following a 24 h incubation period at 37ºC, they were seeded on Petri dishes containing Agar "Staphylococcus Medium 110". Colonies typical of the genus Staphylococcus were collected and stored at 4ºC until tested for catalase, mannitol, hemolysis, DNAse and coagulase. Strains were analyzed by RAPD-PCR to verify their similarity, and tested for sensitivity to ten different antibiotics. From the ninety-two isolated strains, 67 (72,8%) were coagulase- negative and 25 (27,2%) coagulase-positive. Similarity analysis showed a great heterogeneity among strains, but some presented 100%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Similarity; RAPD-PCR; Multiresistance.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400010

Genetic divergence among Nellore breed herds raised in the South Region of Brazil
Provedor de dados: 65
Autores: Lopes,Jader Silva; Rorato,Paulo Roberto Nogara; Weber,Tomás; Araújo,Ronyere Olegário de; Everling,Dionéia Magda; Bresolin,Tiago; Dornelles,Mariana de Almeida; Breda,Fernanda Cristina.
The objective of this study was to evaluate the genetic divergence among Nellore breed animals raised in 45 farms in the Southern Region of Brazil. The characteristic studied was weaning weight adjusted to 205 days of life (P205), from 10,874 animals sired by 425 bulls and 7,629 cows, collected between 1976 and 2001, and distributed in the states of Rio Grande do Sul (1,499), Santa Catarina (2,332) and Paraná (7,043). The animals were distributed by cluster analysis in eight genetic divergent groups, enabling this technique to be applied to organize the matings in order to obtain heterotic effect. The herd/farm groups were formed through the hierarchical Ward method, using the direct (VGD) and maternal (VGM) breeding values predicted by the REML method....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cluster analysis; Genetic diversity; Multivariate analysis; Similarity; Ward hierarchical method.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000500020