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| Registros recuperados: 32 | |
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| FALESI, I. C.. |
| A pesquisa foi realizada em áreas com pastos de idades diferentes, desde meses de idade (formação) ate 11 anos, tomando-se a área com floresta natural como elemento de comparação (testemunha). Foram coletadas amostras de solos de 0-20 cm em cada uma dessas áreas, alem da coleta de perfis pedagógicos ate a uma profundidade de 1,50 m. Apos a obtenção das analises no laboratório, constatou-se que vários nutrientes e índices ou valores, sofreram acréscimos quando o solo foi cultivado com pastagem, melhorando portanto, as suas propriedades químicas. Os elementos que mais se evidenciaram, foram: cálcio, magnésio, fosforo, alumínio, e os índices de pH, V (saturação de bases), S (soma de bases) e saturação de alumínio. Os quadros de analises e gráficos constantes... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Brasil; Sown pasture; Ecosystem; Fertility.; Clima; Ecologia; Ecossistema; Fertilidade; Geologia; Pastagem Cultivada; Topografia; Solo; Vegetação.; Amazonia; Ecology; Geology; Climate; Topography; Soil; Vegetation.. |
| Ano: 1976 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/385693 |
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| Malatesta, Rj; Auster, Pj. |
| Benthic habitats can be loosely divided into low and high relief based upon gross bottom topography. While fish community studies in high relief environments such as coral reefs have been extensively studied using in situ visual analysis, most studies of low relief environments have utilized trawl-based methodologies. Such studies while valuable, are unable to detect small-scale variations in habitat availability and faunal responses to that variation. This paper presents the availability of other techniques, ranging from visual surveys to sonar and bathymetric analysis, which allow research era to address questions of habitat utilization in low relief environments. |
| Tipo: Text |
Palavras-chave: Habitat; Communauté de poissons; Topographie; Habitat; Fish community; Topography. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43587/44027.pdf |
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| Noyon, Margaux; Rasoloarijao, Zo; Huggett, Jenny; Ternon, Jean-francois; Roberts, Michael. |
| Seamounts are recognised as hotspots of biodiversity, attracting large numbers of top predators, but the underlying mechanisms are still unclear. We studied mesozooplankton abundance and size distribution at three shallow seamounts (60m, 240m and 18m deep) in the South West Indian Ocean, along a latitudinal gradient (19°S, 27°S and 33°S). Samples were analysed using a ZooScan, allowing the use of a size-based approach. Differences were observed between seamount areas, but overall zooplankton communities did not seem to be affected by the changes in topography. Only in the lee of La Pérouse seamount was the zooplankton community slightly more concentrated than upstream, suggesting that zooplankton were flushed downstream of the seamount. The southernmost... |
| Tipo: Text |
Palavras-chave: Normalised biovolume size spectrum (NBSS); Mesoscale eddies; Topography; Oligotrophic environment; Pelagic ecology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00609/72157/70920.pdf |
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| Ardhuin, Fabrice. |
| Primary microseisms are background seismic oscillations recorded everywhere on Earth with typical frequencies 0.05 < f < 0.1 Hz. They appear to be generated by ocean waves of the same frequency f, propagating over shallow bottom topography. Previous quantitative models for the generation of primary microseisms considered wave propagation over topographic features with either large scales, equivalent to a vertical point force, or small scales matching ocean wave wavelengths, equivalent to a horizontal force. While the first requires unrealistic bottom slopes to explain measured Rayleigh wave amplitudes, the second produced Love waves and not enough Rayleigh waves. Here we show how the small scales actually produce comparable horizontal and vertical... |
| Tipo: Text |
Palavras-chave: Microseisms; Ocean waves; Topography; Sand waves. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00461/57240/59237.pdf |
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| De Marez, Charly; Carton, Xavier; Morvan, Mathieu; Reinaud, Jean N.. |
| We study the influence of bottom topography on the interaction of two identical vortices in a two-layer, quasi-geostrophic model. The two vortices have piecewise-uniform potential vorticity and are lying in the upper layer of the model. The topography is a smooth bottom slope. For two cyclones, topography modifies the merger critical distance and the merger efficiency: the topographic wave and vortices can advect the two cyclones along the shelf when they are initially far from it or towards the shelf when they are initially closer to it. They can also advect the two cyclones towards each other and thus favour merger. The cyclones deform, and the potential vorticity field undergoes filamentation. Regimes of partial vortex merger or of vortex splitting are... |
| Tipo: Text |
Palavras-chave: Vortex interaction; Topography; Quasi-geostrophic model. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00600/71250/69625.pdf |
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| Le Sommer, Julien; Penduff, Thierry; Theetten, Sebastien; Madec, Gurvan; Barnier, Bernard. |
| Recent studies have shown that the use of an enstrophy-and-energy-conserving momentum advection scheme substantially reduces widespread biases of mean currents in the global 1/4 degrees DRAKKAR model. This paper investigates the origin of these improvements. A series of sensitivity simulations with different momentum advection schemes is performed with the North Atlantic 1/4 degrees DRAKKAR model. Three second order momentum advection schemes conserving, respectively, enstrophy (ens), energy (efx) and both quantities (een) are tested and their impact on the model solution are compared. The mean kinetic energy vertical profile is found to change up to 10% depending on the chosen scheme. This sensitivity is maximum in bottom layers. The analysis of the... |
| Tipo: Text |
Palavras-chave: Z level models; Topography; Momentum advection schemes. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6440.pdf |
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| Omar, Youssouf Moussa; Memery, Laurent; Carton, Xavier; Daher, Abdourahman; Duvielbourg, Eric. |
| The vertical thermohaline and biogeochemical structures of the upper layer (0 - 200 m) were studied in the Gulf of Tadjourah using high-resolution hydrographic data collected in July-August 2013, September 2013 and February 2014. During summer, the superficial layer consisted of the mixed layer (ML) extending to a depth of about 20 - 30 m followed by the thermocline located between 30 and 50 m depth. The ML was thicker in the west and the southeast where the thermal gradient and chlorophyll a concentrations were particularly high. During September, this stratification persisted but the ML became warmer and saltier and the thermocline moved slightly deeper. In February, the ML extended to about 120 m, and the thermocline was less pronounced. A comparison of... |
| Tipo: Text |
Palavras-chave: Thermohaline; Biogeochemical Structures; Mixed Layer Depth; Thermocline; Monsoon Wind; Topography. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00601/71286/69693.pdf |
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| Yang,Kiwook; Park,Jae-Hee; Jung,Soo-Jung; Lee,Hyunsu; Choi,In-Jang; Lee,Jae-Ho. |
| Total knee arthroplasty has increased substantially, however anatomical studies of the genicular arteries (GAs) in this region are rare. The aim of this study was to identify the pattern and branching points of GAs and their relationship. In 42 lower limbs, the pattern and branching points of GAs were confirmed. The horizontal line which extends between the most prominent point of the lateral and medial margins of patella was defined as a reference line. The distance of branching point of the GAs from the reference line was measured, and the correlations between these points were analyzed. The superior lateral and medial genicular arteries (SLGA and SMGA) were located at + 38.17 ± 3.10 mm and + 32.68 ± 3.83 mm from the reference line, respectively. The... |
| Tipo: Journal article |
Palavras-chave: Genicular artery; Popliteal artery; Topography; Variations. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300019 |
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| Alves dos Santos,Daniel; Iatecola,Amilton; Dias Vecina,Cesar Adriano; Caldeira,Eduardo Jose; Noboro Isayama,Ricardo; Chacon,Erivelto Luis; Alves,Marianna Carla; Palomari,Evanisi Teresa; Salete Viotto,Maria Jose; Rodrigues da Cunha,Marcelo. |
| Brachial plexus neuropathies are common complaints among patients seen at orthopedic clinics. The causes range from traumatic to occupational factors and symptoms include paresthesia, paresis, and functional disability of the upper limb. Treatment can be surgical or conservative, but detailed knowledge of the brachial plexus is required in both cases to avoid iatrogenic injuries and to facilitate anesthetic block, preventing possible vascular punctures. Therefore, the objective of this study was to evaluate the topography of the infraclavicular brachial plexus fascicles in different upper limb positions adopted during some clinical procedures. A formalin-preserved, adult, male cadaver was used. The infraclavicular and axillary regions were dissected and... |
| Tipo: Journal article |
Palavras-chave: Brachial plexus; Topography; Peripheral nerve injuries; Upper limb. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300040 |
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| BERTANI,DANIELA FESSEL; RODRIGUES,RICARDO RIBEIRO; BATISTA,JOÃO LUIZ FERREIRA; SHEPHERD,GEORGE JOHN. |
| Neste trabalho, foram estudadas a composição florística e a estrutura fitossociológica da vegetação em um fragmento de floresta ribeirinha, ao longo do rio Passa Cinco, Ipeúna, SP. Foram amostradas 157 parcelas contínuas de 5 x 10 m, em uma área de 0,785 ha. Foram feitas medidas de diâmetro e mapeados todos os indivíduos com DAP maior ou igual a 5 cm, em 1989 e 1998. Constatou-se a presença de um mosaico vegetacional e discutiram-se os possíveis fatores definidores deste mosaico. Foram, também, verificadas as alterações florísticas e fitossociológicas na área após nove anos. As análises multivariadas da vegetação mostraram a presença de três grupos vegetacionais com grande sobreposição aos três tipos de solo identificados na área. As análises quantitativas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical riverine forest; Tree communities; Dynamics; Soil; Topography. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100002 |
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| CATTANIO,JOSÉ H.; ANDERSON,ANTHONY B.; CARVALHO,MANOEL S.. |
| Slight topographic variations appear to exert dramatic effects on the structure of forests subject to inundation. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we examined these effects by studying floristic composition along a topographic gradient. We predicted that, relative to high sites, low sites would be characterized by high representation of life forms and taxa characteristic of inundated sites. We found striking variations in floristic composition along a slight topographic gradient. In comparison with topographically high sites, low sites were characterized by a high representation of Palm trees (Arecaceae), low diversity of trees and lianas, and high plant density. These variations appear to reflect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplain; Floristic; Forest; Topography; Várzea. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000006 |
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| Objetivou-se caracterizar a topografia da área estudada e avaliar sua relação com a distribuição das 20 principais espécies arbóreas amostradas em um gradiente florestal (galeria, mesófila semidecídua de encosta e cerradão), na Estação Ecológica do Panga, município de Uberlândia, Minas Gerais, Brasil. Utilizando-se mangueira de nível, foram medidos os desníveis entre pontos de 211 parcelas distribuídas em oito transectos. O gradiente florestal situa-se sobre uma vertente predominantemente convexa, voltada para Nordeste, com inclinação de cerca de 4% no topo até mais de 40% sobre rochas na base da formação. A sobreposição de mapas (distribuição das espécies e topográfico) mostrou que algumas das espécies são influenciadas positiva ou negativamente às... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Topography; Tree distribution; Gallery forest; Semideciduous forest; Cerradão. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300004 |
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| Registros recuperados: 32 | |
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