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Registros recuperados: 7
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The best of both worlds: Phylogenetic eigenvector regression and mapping Genet. Mol. Biol.
Diniz Filho,José Alexandre Felizola; Villalobos,Fabricio; Bini,Luis Mauricio.
Eigenfunction analyses have been widely used to model patterns of autocorrelation in time, space and phylogeny. In a phylogenetic context, Diniz-Filho et al. (1998) proposed what they called Phylogenetic Eigenvector Regression (PVR), in which pairwise phylogenetic distances among species are submitted to a Principal Coordinate Analysis, and eigenvectors are then used as explanatory variables in regression, correlation or ANOVAs. More recently, a new approach called Phylogenetic Eigenvector Mapping (PEM) was proposed, with the main advantage of explicitly incorporating a model-based warping in phylogenetic distance in which an Ornstein-Uhlenbeck (O-U) process is fitted to data before eigenvector extraction. Here we compared PVR and PEM in respect to...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Evolutionary models; Phylogenetic comparative methods; Phylogenetic imputation; Phylogenetic signal.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300396
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A comparison of metrics for estimating phylogenetic signal under alternative evolutionary models Genet. Mol. Biol.
Diniz-Filho,José Alexandre F.; Santos,Thiago; Rangel,Thiago Fernando; Bini,Luis Mauricio.
Several metrics have been developed for estimating phylogenetic signal in comparative data. These may be important both in guiding future studies on correlated evolution and for inferring broad-scale evolutionary and ecological processes (e.g., phylogenetic niche conservatism). Notwithstanding, the validity of some of these metrics is under debate, especially after the development of more sophisticated model-based approaches that estimate departure from particular evolutionary models (i.e., Brownian motion). Here, two of these model-based metrics (Blomberg's K-statistics and Pagel's λ) are compared with three statistical approaches [Moran's I autocorrelation coefficient, coefficients of determination from the autoregressive method (ARM), and phylogenetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autocorrelation; Blomberg's K; Pagel's lambda; Autoregressive method; Moran's I; Phylogenetic eigenvector regression.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400019
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Mantel test in population genetics Genet. Mol. Biol.
Diniz-Filho,José Alexandre F.; Soares,Thannya N.; Lima,Jacqueline S.; Dobrovolski,Ricardo; Landeiro,Victor Lemes; Telles,Mariana Pires de Campos; Rangel,Thiago F.; Bini,Luis Mauricio.
The comparison of genetic divergence or genetic distances, estimated by pairwise F ST and related statistics, with geographical distances by Mantel test is one of the most popular approaches to evaluate spatial processes driving population structure. There have been, however, recent criticisms and discussions on the statistical performance of the Mantel test. Simultaneously, alternative frameworks for data analyses are being proposed. Here, we review the Mantel test and its variations, including Mantel correlograms and partial correlations and regressions. For illustrative purposes, we studied spatial genetic divergence among 25 populations of Dipteryx alata ("Baru"), a tree species endemic to the Cerrado, the Brazilian savannas, based on 8 microsatellite...
Tipo: Info:eu-repo/semantics/article Palavras-chave: "Baru" tree; Genetic distances; Geographical genetics; Partial correlation; Partial regression.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400002
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Agriculture, habitat loss and spatial patterns of human occupation in a biodiversity hotspot Scientia Agricola
Diniz-Filho,José Alexandre Felizola; Oliveira,Guilherme de; Lobo,Fábio; Ferreira,Laerte Guimarães; Bini,Luis Mauricio; Rangel,Thiago Fernando Lopes Valle Brito.
The Cerrado biome, the second largest biome in Neotropical region, consists of a mosaic of different habitat types, ranging from open grasslands to dense woodlands and dry forests. An intensive recent occupation process has transformed it into the most important region for cattle ranching and intensive commodity crops in Brazil. In this study, a macroecological approach was used to evaluate broad-scale spatial patterns of habitat loss in the Brazilian Cerrado, applying a series of spatial autocorrelation and partial regression analyses to understand how the proportion of remaining natural habitats is correlated with socio-economic variables, expressing different dimensions of human occupation and climatic variation. On average, 59% of the area is occupied...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MODIS; Brazilian Cerrado; Spatial autocorrelation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600007
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Selection of an experimental fish ladder located at the dam of the Itaipu Binacional, Paraná River, Brazil BABT
Fernandez,Domingo Rodriguez; Agostinho,Angelo Antônio; Bini,Luis Mauricio.
The specific selection of a weir and orifice type experimental fish ladder in the dam of the Itaipu Reservoir (Paraná River) was evaluated by samplings in the river downstream and at two points along the ladder (at heights of 10 m and 27 m) during 28 months. Among the 65 species recorded in the river (immediate downstream of the dam), 27 were captured on the ladder. The species that showed highest density on the ladder, the majority migratory, were moderately, or only slightly, abundant downstream. Among the most abundant species downstream, only one, non-migratory, was recorded in the ladder. The structure presented a negative selection in relation to large migratory pimelodids that might be overcome by enlarging the scale of its design. The sampling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish ladder; Fish migration; Selectivity; Fish transposition; Reservoir.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400012
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Diel variation in the ascent of fishes up an experimental fish ladder at Itaipu Reservoir: fish size, reproductive stage and taxonomic group influences Neotropical Ichthyology
Fernandez,Domingo Rodriguez; Agostinho,Angelo Antonio; Bini,Luis Mauricio; Pelicice,Fernando Mayer.
In this study, we evaluated the fish ascent in the experimental ladder at Itaipu Reservoir (Paraná State, Brazil), in relation to diel variation, fish size, reproductive stages and species composition. The study was carried out from October, 1995 to February, 1996 and from November, 1996 to January, 1997 at two points on the ladder (boxes at heights of 10 and 27 m). Twenty-two species were recorded, and Prochilodus lineatus, Pimelodus maculatus, Leporinus obtusidens, Schizodon borellii and Leporinus friderici accounted for 86.6 % of the total catch. Fish length did not differ between diel periods and boxes. On the other hand, fish abundance of the main species was significantly influenced by box position, reproductive stage and diel period. The higher box...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish migration; Fish passage; Selectivity; Non-reproductive fish; Management.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200016
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Correspondências entre classificações fisiográficas e padrões espaciais de assembleias de aves e mamíferos no Pantanal Brasileiro Ecología austral
Rodrigues Faria,Rogério; Braga,Rosana Talita; Leonardo Mioto,Camila; Paranhos Filho,Antonio Conceição; Souza,Franco Leandro; Bini,Luis Mauricio.
Estudos prévios no Pantanal brasileiro sugerem que heterogeneidade fisiográfica poderia ser usada para delimitar diferentes sub-regiões. Todavia, a magnitude na qual essas regionalizações refletem padrões espaciais de variação na diversidade beta para diferentes grupos taxonômicos não foi testada até o momento. O objetivo deste trabalho foi avaliar se os esquemas de regionalização propostos para o Pantanal brasileiro descrevem adequadamente a diversidade beta para aves e mamíferos. A presença e ausência de cada espécie de mamíferos e aves foram registradas em cada uma das 80 células de 0.5x0.5 graus em um mapa de grade quadriculada. O índice de similaridade de Jaccard foi usado para estimar a similaridade em cada par de células. Um método de classificação...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Regionalização; Áreas úmidas; Biodiversidade animal; K-means; T áxons como substituto; Forças de classificação.
Ano: 2013 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2013000100002
Registros recuperados: 7
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