Consulta: subjectFacets:"Beta diversity"
Registros recuperados: 19
Data/hora: 17/06/2024 02:32:14

Germinated millet (Pennisetum glaucum (L.) R. Br.) flour improved the gut function and its microbiota composition in rats fed with high-fat high-fructose diet.
Provedor de dados: 119
Autores: THEODORO, J. M. V.; GRANCIERI, M.; GOMES,, M. J. C.; TOLEDO, R. C. L.; SÃO JOSÉ, V. P. B. DE; MANTOVANI, H. C.; CARVALHO, C. W. P. de; SILVA, B. P. DA; MARTINO, H. S. D.
Germinated millet (Pennisetum glaucum (L.) R. Br.) is a source of phenolic compounds that has potential prebiotic action. This study aims at evaluating the action of germinated pearl millet on gut function and its microbiota composition in Wistar rats fed with a high-fat high-fructose (HFHF) diet. In the first stage, lasting eight weeks, the experiment consisted of two groups: AIN93M (n = 10) and HFHF group (n = 20). In the second stage, which lasted ten weeks, the animals of the AIN-93M group (n = 10) were kept, while the HFHF group was dismembered into HFHF (HFHF diet, n = 10) and HFHF + millet (HFHF added 28.6% of germinated millet flour, n = 10) groups. After the 18th week, the urine of the animals was collected for the analysis of lactulose and...
Tipo: Artigo de periódico
Palavras-chave: Beta diversity; Intestinal health; Intestinal permeability; Tecnologia de Alimento; Goblet cells; Prebiotics; Whole grain foods.
Ano: 2022
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148424

Consumption of extruded sorghum SC319 improved gut microbiota at genus level and reduced anthropometric markers in men with overweight: a randomized controlled clinical trial.
Provedor de dados: 119
Autores: LÚCIO, H.; ANUNCIAÇÃO, P.; SILVA, B. da; SILVA, A. da; QUEIROZ, V. A. V.; CARVALHO, C. W. P. de; PINHEIRO-SANT'ANA, H.; MARTINO, H.
Background: Sorghum is a cereal source of energy, carbohydrates, resistant starch, proanthocyanidins, and 3-deoxyanthocyanins; it promotes satiety by slowing digestion and benefits intestinal health. Objective: This study investigated the effects of extruded sorghum SC319 consumption on intestinal health, weight loss, and inflammatory markers in men with overweight. Methods: This was a randomized, controlled, single-blind clinical trial. Twenty-one men were randomly allocated into one of two groups: the sorghum group (test), which received 40 g of extruded SC319 whole sorghum (n = 10), or the wheat group (control), which received 38 g of extruded whole wheat (n = 11) for eight weeks. Results: The sorghum consumption increased the weight loss intragroup,...
Tipo: Artigo de periódico
Palavras-chave: Fecal pH; Short-chain; Beta diversity; Sorgo; Extrusão; Peso; Sorghum Bicolor; Ácido Graxo; Cadeia Alimentar; Perda de Peso; Fatty acids; Weight loss; Body fat.
Ano: 2023
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1156322

Patterns of species diversity in different spatial scales and spatial heterogeneity on beta diversity
Provedor de dados: 39
Autores: Soares,Caio J. R. S.; Sampaio,Mauricio B.; Santos-Filho,Francisco S.; Martins,Fernando R.; Santos,Flavio A. M. dos.
ABSTRACT Patterns of species diversity are essential to understand community structure. We aimed to determine species diversity and patterns of beta diversity in different spatial scales. We sampled three thousand individuals between the coordinates 22°10'S to 22°16'S and 47°47'W to 48°00'W to assess species diversity in three spatial scales (maximum distances of 80 m, 1,400 m, and 12,000 m), using the point-centered-quarter method. We partitioned gamma diversity into alpha and beta components. Beta diversity was partitioned into dissimilarities produced by spatial species turnover and nestedness. The contribution of beta diversity to gamma diversity was greater than that of alpha diversity in all scales, although the patterns of species diversity were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta diversity; Biogeography; Disturbance; Diversity partition; Local spatial scale; Nestedness; Phytogeography; Spatial species turnover.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100009

Bird diversity along a gradient of fragmented habitats of the Cerrado
Provedor de dados: 42
Autores: JESUS,SHAYANA DE; PEDRO,WAGNER A.; BISPO,ARTHUR A.
ABSTRACT Understanding the factors that affect biodiversity is of central interest to ecology, and essential to species conservation and ecosystems management. We sampled bird communities in 17 forest fragments in the Cerrado biome, the Central-West region of Brazil. We aimed to know the communities structure pattern and the influence of geographical distance and environmental variables on them, along a gradient of fragmented habitats at both local and landscape scales. Eight structural variables of the fragments served as an environmental distance measurement at the local scale while five metrics served as an environmental distance measurement at the landscape scale. Species presence-absence data were used to calculate the dissimilarity index. Beta...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta diversity; Environmental distance; Forest fragments; Landscape scale; Turnover.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100123

Trait‐based approach to monitoring marine benthic data along 500 km of coastline
Provedor de dados: 5
Autores: Boyé, Aurelien; Thiébaut, Éric; Grall, Jacques; Legendre, Pierre; Broudin, Caroline; Houbin, Céline; Le Garrec, Vincent; Maguer, Marion; Droual, Gabin; Gauthier, Olivier.
Aim β diversity and its linkages with ecosystem functioning remain poorly documented. This impedes our capacity to predict biodiversity changes and how they affect ecosystem functioning at scales relevant for conservation. Here, we address the functional implications of ongoing seafloor changes by characterizing at regional scale the taxonomic and functional α and β diversities of benthic habitats currently threatened by biotic homogenization. Location Western Europe. Methods Combining a trait‐based approach to benthic community monitoring data covering a 7‐year period and 500 km of coast, we explored the mechanisms governing community assembly in habitats associated with two types of foundation species, intertidal seagrass and subtidal maerl beds,...
Tipo: Text
Palavras-chave: Beta diversity; Biotic homogenization; Broad-scale monitoring; Community assembly; Coralline algae; Ecosystem engineers; Functional diversity; Zostera marina.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00515/62688/67074.pdf

Interplay between abiotic factors and species assemblages mediated by the ecosystem engineer Sabellaria alveolata (Annelida: Polychaeta)
Provedor de dados: 5
Autores: Jones, Auriane; Dubois, Stanislas; Desroy, Nicolas; Fournier, Jerome.
abellaria alveolata is a gregarious polychaete that uses sand particles to build three-dimensional structures known as reefs, fixed atop rocks or built on soft sediments. These structures are known to modify the local grain-size distribution and to host a highly diversified macrofauna, altered when the reef undergoes disturbances. The goal of this study was to investigate the different sedimentary and biological changes associated with the presence of a S. alveolata reef over two contrasting seasons (late winter and late summer), and how these changes were linked. Three different sediments were considered: the engineered sediment (the actual reef), the associated sediment (the soft sediment surrounding the reef structures) and a control soft sediment (i.e....
Tipo: Text
Palavras-chave: Honeycomb worm; Macrobenthos; Benthic primary production; Habitat disturbance; Silt; Beta diversity; France; Brittany; Mont Saint-Michel Bay.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00405/51649/52198.pdf

Spatial pattern in species richness of demersal fish assemblages on the continental shelf of the northern Mediterranean Sea: a multiscale analysis
Provedor de dados: 5
Autores: Gaertner, J; Bertrand, Jacques; Relini, G; Papaconstantinou, C; Mazouni, N; De Sola, L; Durbec, J; Jukic Peladic, S; Souplet, Arnauld.
The species richness pattern of groundfish species in the entire northern Mediterranean Sea was examined at 3 spatial scales: region, large biogeographical zone and basin. We analysed 1914 trawl hauls collected using a single sampling design in the trawlable areas of the continental shelves between the Strait of Gibraltar and the Strait of Dardanelles (from 36.3 to 45.7 degrees N and 5.3 degrees W to 28 E). Spatial pattern in species diversity was assessed using complementary methods (Chao2 estimates of total species richness, mean species richness and beta diversity). No matter which scale was used, the expected longitudinally decreasing trend in species richness, which has been widely described in previous studies, did not appear when comparing estimates...
Tipo: Text
Palavras-chave: Lessepsian; Large scale; Mediterranean Sea; Groundfishes; Beta diversity; Species richness.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3569.pdf

The influence of geological, geochemical, and biogenic habitat heterogeneity on seep biodiversity
Provedor de dados: 5
Autores: Cordes, Erik E.; Cunha, Marina R.; Galeron, Joelle; Mora, Camilo; Olu-le Roy, Karine; Sibuet, Myriam; Van Gaever, Saskia; Vanreusel, Ann; Levin, Lisa A.
Cold seeps are among the most heterogeneous of all continental margin habitats. Abiotic Sources of heterogeneity in these systems include local variability in fluid flow, geochemistry, and substrate type, which give rise to different sets of microbial communities, microbial symbiont-bearing foundation species, and associated heterotrophic species. Biogenic habitats created by microbial mats and the symbiotic species including vesicomyid clams, bathymodiolin mussels, and siboglinid tubeworms add an additional layer of complexity to seep habitats. These forms of habitat heterogeneity result in a variety of macrofaunal and meiofaunal communities that respond to changes in structural complexity, habitat geochemistry, nutrient sources, and interspecific...
Tipo: Text
Palavras-chave: Beta diversity; Chemosynthetic communities; Cold seep; Continental margin; Macrofauna; Meiofauna; Metacommunity; Species accumulation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11281/7826.pdf

Community composition and species richness of parasitoids infesting Yponomeuta species in the Netherlands
Provedor de dados: 16
Autores: Cleary, Daniel F.R.
Parasitoid assemblages infesting Yponomeuta species in the Netherlands were investigated. Parasitoid species richness and community composition were related to host species, habitat, temporal and spatial variation. Both community structure and species richness did not differ among habitats. There was no significant difference in species richness between years (1994 and 1995) but there was a significant difference in community composition. Community composition and species richness both differed among host species, although this latter result was solely due to the host species Y. evonymellus. There was no significant relationship between community similarity and distance. These results indicate that the parasitoids of the moth genus Yponomeuta in the...
Tipo: Article / Letter to the editor
Palavras-chave: ANOSIM; Beta diversity; Community composition; Distance; Species richness.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/534398

Environment heterogeneity and seasonal effects in ground-dwelling ant (Hymenoptera: Formicidae) assemblages in the Parque Estadual do Rio Doce, MG, Brazil
Provedor de dados: 82
Autores: Coelho,Igor R.; Ribeiro,Sérvio P.
This work aimed to explore the response of ant species assemblage to contrasting types of forests in a semideciduous stationary rainforest, in the Parque Estadual do Rio Doce, South Eastern Brazil. We compared antropomorphic borders of this park and natural ecotones, such as lake margins continuous with forests, as well as preserved forests far from ecotones. We investigated whether ground-dwelling ant species richness, abundance and composition would change according to forest types and ecotones. We expected greater species richness in interior tall forest, compared with low forest or ecotone habitats. In addition, we tested the effect of climate seasonality on ant assemblages found in each studied vegetation type. Each forest type was surveyed based on a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alpha diversity; Beta diversity; Edge effect; Functional groups; Atlantic rainforest.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000100004

Orb-weaving spider diversity in the Iberá Marshlands, Argentina
Provedor de dados: 82
Autores: Rubio,Gonzalo D; Moreno,Claudia E.
The Iberá Marshlands RAMSAR reserve, in the northeast of Argentina, is one of the largest and most important wetlands of America. In this study we assess orb-weaving spider (Araneae: Orbiculariae) diversity in this reserve, analyzing different facets of local diversity (species richness, diversity, evenness and taxonomic distinctness), and the contribution of species differentiation (beta diversity) among localities and habitat types to the composition of regional diversity. We found 1657 individuals of 59 orb-weaving spider species/morphospecies. Local diversity differs among the three sampled localities. At the habitat level, the different facets of biodiversity followed a clear pattern, where woodlands have higher species richness, diversity, evenness...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spider inventory; Species richness; Ecological diversity; Taxonomic distinctness; Beta diversity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400006

Spatio-temporal segregation and size distribution of fish assemblages as related to non-native species occurrence in the middle rio Doce Valley, MG, Brazil
Provedor de dados: 83
Autores: Giacomini,Henrique Corrêa; Lima Jr.,Dilermando Pereira; Latini,Anderson Oliveira; Espírito-Santo,Helder Mateus Viana.
The lakes in the middle rio Doce Valley (MG) are suffering impacts due to the introduction of invasive fish species, mainly piscivorous species like red piranha Pygocentrus nattereri and peacock bass Cichla kelberi. Fishes were collected in bimonthly samples conducted at ten lakes along a year. The present study showed that the composition of native fish assemblages is significantly related to the presence and type of non-native species. Fish species distribution among lakes can be explained by differences in species body size: smaller native species are less concentrated in lakes with invasive piscivores, which is in accordance with the hypothesis that they have greater susceptibility to predation by invaders. Another probable cause for this correlation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Species invasions; Beta diversity; Metacommunity; Body size; Predation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100012

Zoogeography of Elasmobranchs in the Colombian Pacific Ocean and Caribbean Sea
Provedor de dados: 83
Autores: Navia,Andrés Felipe; Mejía-Falla,Paola Andrea; Hleap,José Sergio.
ABSTRACT In order to investigate zoogeographical patterns of the marine elasmobranch species of Colombia, species richness of the Pacific and Caribbean and their subareas (Coastal Pacific, Oceanic Pacific, Coastal Caribbean, Oceanic Caribbean) was analyzed. The areas shared 10 families, 10 genera and 16 species of sharks, and eight families, three genera and four species of batoids. Carcharhinidae had the highest contribution to shark richness, whereas Rajidae and Urotrygonidae had the greatest contribution to batoid richness in the Caribbean and Pacific, respectively. Most elasmobranchs were associated with benthic and coastal habitats. The similarity analysis allowed the identification of five groups of families, which characterize the elasmobranch...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Batoids; Beta diversity; Historical biogeography; Richness; Sharks; Vagility.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200215

Ant species distribution along a topographic gradient in a "terra-firme" forest reserve in Central Amazonia
Provedor de dados: 86
Autores: Oliveira,Pollyana Yvonica de; Souza,Jorge Luiz Pereira de; Baccaro,Fabricio Beggiato; Franklin,Elizabeth.
In Amazonia, topographical variations in soil and forest structure within "terra-firme" ecosystems are important factors correlated with terrestrial invertebrates' distribution. The objective of this work was to assess the effects of soil clay content and slope on ant species distribution over a 25 km² grid covering the natural topographic continuum. Using three complementary sampling methods (sardine baits, pitfall traps and litter samples extracted in Winkler sacks), 300 subsamples of each method were taken in 30 plots distributed over a wet tropical forest in the Ducke Reserve (Manaus, AM, Brazil). An amount of 26,814 individuals from 11 subfamilies, 54 genera, 85 species and 152 morphospecies was recorded (Pheidole represented 37% of all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta diversity; Environmental gradient; Formicidae; Soil texture; Tropical forest.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800008

Fauna de Muscidae (Diptera) em três localidades do Estado do Paraná, Brasil, capturada por armadilha Malaise
Provedor de dados: 92
Autores: Costacurta,Nise do Carmo; Marinoni,Renato C.; Carvalho,Claudio J. B. de.
During two years, from August 1986 to July 1988, the entomofauna of some preserved areas of Parana State, southern Brazil, was sampled in a project called "Levantamento da Fauna Entomológica no Estado do Paraná (PROFAUPAR)". Specimens of Muscidae (Diptera) were sorted out from the material collected using Malaise traps in three of the eight sites sampled (Colombo, Ponta Grossa and Guarapuava) in the first year (August 1986 to July 1987). A total of 7,014 specimens of Muscidae was captured and 91 species were identified. Neodexiopsis flavipalpis Albuquerque was the most abundant species in Ponta Grossa (672 specimens) and in Guarapuava (332 specimens). For Colombo, the most abundant species was Neodexiopsis vulgaris Couri &amp;amp; Albuquerque (172...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alpha diversity; Beta diversity; Faunistic; Seasonality; Species richness estimators.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000300005

Spatio-temporal dynamics of Alticini (Coleoptera, Chrysomelidae) in a fragment of Araucaria Forest in the state of Parana, Brazil
Provedor de dados: 92
Autores: Linzmeier,Adelita Maria; Ribeiro-Costa,Cibele Stramare.
Alticini fauna from five areas, two with different types of management (Borda and Araucaria) and three with different levels of conservation (Fase 1, Fase 2 and Fase 3), in the Araucaria Forest of the Parana was captured with malaise traps. The material was collected weekly, from September/1999 to August/2001, in the Parque Estadual of Vila Velha, Ponta Grossa. 1,891 individuals of 106 Alticini species were collected with only seven species common to all areas. Despite the proximity between sampling areas, the number of species shared between pairs of areas was low, not reaching 40%, with the Araucaria and Fase 1 areas being the most similar. The community structure of the areas Fase 1 and Fase 2 were most related. Fase 1, in initial stage of succession,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Beta diversity; Community structure; Flea beetles; Malaise.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000200013

Spatial variation of dung beetle assemblages associated with forest structure in remnants of southern Brazilian Atlantic Forest
Provedor de dados: 92
Autores: Silva,Pedro Giovâni da; Hernández,Malva Isabel Medina.
ABSTRACT The Brazilian Atlantic Forest is one of the world's biodiversity hotspots, and is currently highly fragmented and disturbed due to human activities. Variation in environmental conditions in the Atlantic Forest can influence the distribution of species, which may show associations with some environmental features. Dung beetles (Coleoptera: Scarabaeinae) are insects that act in nutrient cycling via organic matter decomposition and have been used for monitoring environmental changes. The aim of this study is to identify associations between the spatial distribution of dung beetle species and Atlantic Forest structure. The spatial distribution of some dung beetle species was associated with structural forest features. The number of species among the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta diversity; Species composition; Species diversity; Spatial distribution; Tropical forest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100073

Spatial diversity patterns of birds in a vegetation mosaic of the Pantanal, Mato Grosso, Brazil
Provedor de dados: 103
Autores: Signor,Cleiton Adriano; Pinho,João Batista.
In this contribution we characterize the spatial diversity of bird populations in a heterogeneous landscape with respect to vegetation in the northern Pantanal region of Brazil. The method of additive partitioning of species diversity (γ = &amp;#945; + β) was used. Samples were collected in a grid with 30 sampling plots within a 25 km² area (5 x 5 km). A total of 163 bird species were found, comprising 114 resident species and 49 regional migrants. Most species were restricted spatially, with 58% found in a maximum of five sampling plots, while 15% were found in only one plot. The beta diversity comprised 77% of total diversity and was lower for residents than for regional migrants (66% and 88%, respectively). This suggests greater spatial heterogeneity in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Additive diversity; Beta diversity; Flood plains; Regional migration.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600005

Environmental heterogeneity: Anuran diversity in homogeneous environments
Provedor de dados: 103
Autores: Silva,Rodrigo Augusto; Martins,Itamar Alves; Rossa-Feres,Denise de C.
The northwestern region of São Paulo was extensively deforested during the agricultural expansion in the last century and only small fragments of the original vegetation cover remained. In this study, we investigated how habitat features influence the composition, richness, and diversity of anurans in environments homogenized by agricultural activities. We sampled monthly six breeding ponds located in pasture areas during twelve months. We recorded ten environmental descriptors for each breeding pond. We found 18 anuran species. The breeding ponds were structurally similar, but species composition differed among them. The environmental descriptors influence varies for each species, as demonstrated by the different associations between species and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibia; Community ecology; Environmental indicators; Habitat use; Beta diversity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500009